/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/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:14:03,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:14:03,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:14:03,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:14:03,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:14:03,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:14:03,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:14:03,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:14:03,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:14:03,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:14:03,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:14:03,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:14:03,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:14:03,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:14:03,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:14:03,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:14:03,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:14:03,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:14:03,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:14:03,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:14:03,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:14:03,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:14:03,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:14:03,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:14:03,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:14:03,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:14:03,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:14:03,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:14:03,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:14:03,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:14:03,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:14:03,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:14:03,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:14:03,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:14:03,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:14:03,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:14:03,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:14:03,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:14:03,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:14:03,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:14:03,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:14:03,401 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 16:14:03,432 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:14:03,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:14:03,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:14:03,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:14:03,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:14:03,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:14:03,436 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:14:03,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:14:03,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:14:03,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:14:03,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:14:03,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:14:03,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:14:03,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:14:03,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:14:03,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:14:03,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:14:03,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:14:03,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:14:03,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:14:03,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:14:03,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:14:03,440 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:14:03,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:14:03,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:14:03,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:14:03,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:14:03,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:14:03,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:14:03,787 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:14:03,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2021-07-09 16:14:03,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97220a31/585a17ecd03c4d6a8fedbf5921d56e61/FLAGc79d22c07 [2021-07-09 16:14:04,406 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:14:04,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2021-07-09 16:14:04,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97220a31/585a17ecd03c4d6a8fedbf5921d56e61/FLAGc79d22c07 [2021-07-09 16:14:04,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97220a31/585a17ecd03c4d6a8fedbf5921d56e61 [2021-07-09 16:14:04,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:14:04,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:14:04,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:14:04,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:14:04,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:14:04,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:14:04" (1/1) ... [2021-07-09 16:14:04,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d7f682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:04, skipping insertion in model container [2021-07-09 16:14:04,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:14:04" (1/1) ... [2021-07-09 16:14:04,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:14:04,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:14:05,300 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/fib_bench-1.i[30920,30933] [2021-07-09 16:14:05,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:14:05,313 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:14:05,359 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/fib_bench-1.i[30920,30933] [2021-07-09 16:14:05,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:14:05,399 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:14:05,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05 WrapperNode [2021-07-09 16:14:05,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:14:05,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:14:05,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:14:05,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:14:05,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:14:05,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:14:05,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:14:05,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:14:05,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:14:05,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:14:05,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:14:05,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:14:05,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (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 16:14:05,565 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:14:05,566 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:14:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:14:05,566 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:14:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:14:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 16:14:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:14:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:14:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:14:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 16:14:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:14:05,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:14:05,568 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 16:14:05,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:14:05,864 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-09 16:14:05,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:14:05 BoogieIcfgContainer [2021-07-09 16:14:05,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:14:05,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:14:05,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:14:05,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:14:05,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:14:04" (1/3) ... [2021-07-09 16:14:05,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b52c5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:14:05, skipping insertion in model container [2021-07-09 16:14:05,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (2/3) ... [2021-07-09 16:14:05,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b52c5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:14:05, skipping insertion in model container [2021-07-09 16:14:05,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:14:05" (3/3) ... [2021-07-09 16:14:05,872 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2021-07-09 16:14:05,877 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:14:05,877 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:14:05,877 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:14:05,878 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:14:05,902 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,908 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,908 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,908 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,915 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,915 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,916 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,916 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,916 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,916 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,920 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,920 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,921 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,921 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,921 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,921 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,922 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-09 16:14:05,939 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 16:14:05,953 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:14:05,954 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:14:05,954 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:14:05,954 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:14:05,954 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:14:05,954 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:14:05,954 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:14:05,954 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:14:05,963 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-07-09 16:14:06,019 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 16:14:06,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:06,041 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:06,041 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:06,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-07-09 16:14:06,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:06,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769146229] [2021-07-09 16:14:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:06,425 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 16:14:06,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:06,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769146229] [2021-07-09 16:14:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769146229] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:06,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:06,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:14:06,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033102683] [2021-07-09 16:14:06,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:14:06,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:14:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:14:06,456 INFO L87 Difference]: Start difference. First operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:06,626 INFO L93 Difference]: Finished difference Result 1756 states and 4724 transitions. [2021-07-09 16:14:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 16:14:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 16:14:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:06,654 INFO L225 Difference]: With dead ends: 1756 [2021-07-09 16:14:06,654 INFO L226 Difference]: Without dead ends: 1425 [2021-07-09 16:14:06,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:14:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-07-09 16:14:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-07-09 16:14:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-07-09 16:14:06,769 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-07-09 16:14:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:06,793 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-07-09 16:14:06,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-07-09 16:14:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 16:14:06,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:06,798 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] [2021-07-09 16:14:06,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:14:06,799 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:06,799 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-07-09 16:14:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342540710] [2021-07-09 16:14:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:06,967 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 16:14:06,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342540710] [2021-07-09 16:14:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342540710] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:06,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:06,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:14:06,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253665024] [2021-07-09 16:14:06,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:14:06,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:14:06,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:14:06,972 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:07,084 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-07-09 16:14:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:14:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 16:14:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:07,097 INFO L225 Difference]: With dead ends: 2025 [2021-07-09 16:14:07,097 INFO L226 Difference]: Without dead ends: 1758 [2021-07-09 16:14:07,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:14:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-09 16:14:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-07-09 16:14:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-07-09 16:14:07,165 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-07-09 16:14:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:07,166 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-07-09 16:14:07,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-07-09 16:14:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 16:14:07,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:07,174 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] [2021-07-09 16:14:07,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:14:07,176 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-07-09 16:14:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:07,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834698770] [2021-07-09 16:14:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,244 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 16:14:07,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:07,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834698770] [2021-07-09 16:14:07,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834698770] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:07,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:07,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:14:07,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77413475] [2021-07-09 16:14:07,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:14:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:14:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:14:07,247 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:07,333 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-07-09 16:14:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:14:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 16:14:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:07,343 INFO L225 Difference]: With dead ends: 2062 [2021-07-09 16:14:07,343 INFO L226 Difference]: Without dead ends: 1758 [2021-07-09 16:14:07,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:14:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-09 16:14:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-07-09 16:14:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-07-09 16:14:07,429 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-07-09 16:14:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:07,429 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-07-09 16:14:07,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-07-09 16:14:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 16:14:07,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:07,432 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] [2021-07-09 16:14:07,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:14:07,432 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-07-09 16:14:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:07,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548461411] [2021-07-09 16:14:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,516 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 16:14:07,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:07,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548461411] [2021-07-09 16:14:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548461411] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:07,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:07,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:14:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702722238] [2021-07-09 16:14:07,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:14:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:07,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:14:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:14:07,518 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:07,624 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-07-09 16:14:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:14:07,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 16:14:07,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:07,644 INFO L225 Difference]: With dead ends: 2318 [2021-07-09 16:14:07,644 INFO L226 Difference]: Without dead ends: 1987 [2021-07-09 16:14:07,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:14:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-07-09 16:14:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-07-09 16:14:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-07-09 16:14:07,697 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-07-09 16:14:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:07,699 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-07-09 16:14:07,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-07-09 16:14:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:07,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:07,703 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:07,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:14:07,703 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-07-09 16:14:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:07,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372036515] [2021-07-09 16:14:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:07,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:07,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372036515] [2021-07-09 16:14:07,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372036515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:07,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954584118] [2021-07-09 16:14:07,849 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 16:14:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:14:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:08,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954584118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:08,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:08,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 16:14:08,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533193389] [2021-07-09 16:14:08,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:14:08,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:14:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:14:08,239 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:08,481 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-07-09 16:14:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:14:08,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 16:14:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:08,495 INFO L225 Difference]: With dead ends: 2931 [2021-07-09 16:14:08,495 INFO L226 Difference]: Without dead ends: 2549 [2021-07-09 16:14:08,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:14:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-07-09 16:14:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-07-09 16:14:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-07-09 16:14:08,548 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-07-09 16:14:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:08,548 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-07-09 16:14:08,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-07-09 16:14:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:08,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:08,551 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] [2021-07-09 16:14:08,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:08,773 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-07-09 16:14:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:08,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825750376] [2021-07-09 16:14:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:08,876 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 16:14:08,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825750376] [2021-07-09 16:14:08,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825750376] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:08,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:08,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 16:14:08,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341388424] [2021-07-09 16:14:08,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:14:08,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:14:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:14:08,886 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:08,982 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-07-09 16:14:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:14:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 16:14:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:08,995 INFO L225 Difference]: With dead ends: 2566 [2021-07-09 16:14:08,995 INFO L226 Difference]: Without dead ends: 2414 [2021-07-09 16:14:08,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:14:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-07-09 16:14:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-07-09 16:14:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-07-09 16:14:09,054 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-07-09 16:14:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:09,054 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-07-09 16:14:09,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-07-09 16:14:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:09,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:09,058 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] [2021-07-09 16:14:09,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 16:14:09,059 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-07-09 16:14:09,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:09,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002244595] [2021-07-09 16:14:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,171 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 16:14:09,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002244595] [2021-07-09 16:14:09,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002244595] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:09,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:09,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 16:14:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411111105] [2021-07-09 16:14:09,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:14:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:14:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:14:09,179 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:09,344 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-07-09 16:14:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:14:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 16:14:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:09,359 INFO L225 Difference]: With dead ends: 2949 [2021-07-09 16:14:09,359 INFO L226 Difference]: Without dead ends: 2682 [2021-07-09 16:14:09,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-09 16:14:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1866. [2021-07-09 16:14:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 2.72171581769437) internal successors, (5076), 1865 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 5076 transitions. [2021-07-09 16:14:09,418 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 5076 transitions. Word has length 42 [2021-07-09 16:14:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:09,418 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 5076 transitions. [2021-07-09 16:14:09,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 5076 transitions. [2021-07-09 16:14:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:09,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:09,422 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] [2021-07-09 16:14:09,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 16:14:09,422 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1574389667, now seen corresponding path program 3 times [2021-07-09 16:14:09,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:09,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216247577] [2021-07-09 16:14:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,542 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 16:14:09,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:09,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216247577] [2021-07-09 16:14:09,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216247577] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:09,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:09,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 16:14:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837451906] [2021-07-09 16:14:09,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:14:09,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:09,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:14:09,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:14:09,543 INFO L87 Difference]: Start difference. First operand 1866 states and 5076 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:09,729 INFO L93 Difference]: Finished difference Result 3342 states and 8950 transitions. [2021-07-09 16:14:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:14:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 16:14:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:09,760 INFO L225 Difference]: With dead ends: 3342 [2021-07-09 16:14:09,760 INFO L226 Difference]: Without dead ends: 2896 [2021-07-09 16:14:09,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:14:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-07-09 16:14:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2103. [2021-07-09 16:14:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7121788772597526) internal successors, (5701), 2102 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5701 transitions. [2021-07-09 16:14:09,823 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5701 transitions. Word has length 42 [2021-07-09 16:14:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:09,824 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5701 transitions. [2021-07-09 16:14:09,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5701 transitions. [2021-07-09 16:14:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:09,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:09,828 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:09,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 16:14:09,829 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-07-09 16:14:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:09,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361514223] [2021-07-09 16:14:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:09,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:09,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361514223] [2021-07-09 16:14:09,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361514223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542863922] [2021-07-09 16:14:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:10,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:10,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542863922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:10,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:10,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391794314] [2021-07-09 16:14:10,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:10,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:10,361 INFO L87 Difference]: Start difference. First operand 2103 states and 5701 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:10,500 INFO L93 Difference]: Finished difference Result 3026 states and 7980 transitions. [2021-07-09 16:14:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:14:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 16:14:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:10,508 INFO L225 Difference]: With dead ends: 3026 [2021-07-09 16:14:10,509 INFO L226 Difference]: Without dead ends: 2874 [2021-07-09 16:14:10,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:14:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-07-09 16:14:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2191. [2021-07-09 16:14:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.6968036529680366) internal successors, (5906), 2190 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 5906 transitions. [2021-07-09 16:14:10,566 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 5906 transitions. Word has length 47 [2021-07-09 16:14:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:10,567 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 5906 transitions. [2021-07-09 16:14:10,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 5906 transitions. [2021-07-09 16:14:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:10,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:10,571 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:10,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 16:14:10,785 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-07-09 16:14:10,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:10,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30027908] [2021-07-09 16:14:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:10,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:10,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30027908] [2021-07-09 16:14:10,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30027908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:10,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864130753] [2021-07-09 16:14:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:10,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:10,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864130753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:11,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:11,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:11,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998696376] [2021-07-09 16:14:11,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:11,356 INFO L87 Difference]: Start difference. First operand 2191 states and 5906 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:11,859 INFO L93 Difference]: Finished difference Result 4271 states and 11252 transitions. [2021-07-09 16:14:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:14:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 16:14:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:11,869 INFO L225 Difference]: With dead ends: 4271 [2021-07-09 16:14:11,869 INFO L226 Difference]: Without dead ends: 3561 [2021-07-09 16:14:11,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:14:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-07-09 16:14:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2325. [2021-07-09 16:14:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 2.7104130808950084) internal successors, (6299), 2324 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 6299 transitions. [2021-07-09 16:14:11,940 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 6299 transitions. Word has length 47 [2021-07-09 16:14:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:11,940 INFO L482 AbstractCegarLoop]: Abstraction has 2325 states and 6299 transitions. [2021-07-09 16:14:11,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 6299 transitions. [2021-07-09 16:14:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:11,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:11,946 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:12,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 16:14:12,161 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1589922218, now seen corresponding path program 1 times [2021-07-09 16:14:12,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:12,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607493373] [2021-07-09 16:14:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:12,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:12,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607493373] [2021-07-09 16:14:12,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607493373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:12,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71330910] [2021-07-09 16:14:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:14:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:12,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71330910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:12,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:12,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640565851] [2021-07-09 16:14:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:12,570 INFO L87 Difference]: Start difference. First operand 2325 states and 6299 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:12,968 INFO L93 Difference]: Finished difference Result 5225 states and 13859 transitions. [2021-07-09 16:14:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:14:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 16:14:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:12,981 INFO L225 Difference]: With dead ends: 5225 [2021-07-09 16:14:12,981 INFO L226 Difference]: Without dead ends: 4488 [2021-07-09 16:14:12,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:14:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4488 states. [2021-07-09 16:14:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4488 to 2392. [2021-07-09 16:14:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.7314930991217063) internal successors, (6531), 2391 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 6531 transitions. [2021-07-09 16:14:13,049 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 6531 transitions. Word has length 47 [2021-07-09 16:14:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:13,050 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 6531 transitions. [2021-07-09 16:14:13,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 6531 transitions. [2021-07-09 16:14:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:13,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:13,054 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 16:14:13,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 16:14:13,277 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-07-09 16:14:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:13,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130443271] [2021-07-09 16:14:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:13,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:13,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130443271] [2021-07-09 16:14:13,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130443271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:13,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526966757] [2021-07-09 16:14:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:13,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:13,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:13,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:13,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526966757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:13,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:13,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 16:14:13,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736459390] [2021-07-09 16:14:13,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:14:13,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:13,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:14:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:14:13,658 INFO L87 Difference]: Start difference. First operand 2392 states and 6531 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:13,904 INFO L93 Difference]: Finished difference Result 4172 states and 11147 transitions. [2021-07-09 16:14:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:14:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:13,913 INFO L225 Difference]: With dead ends: 4172 [2021-07-09 16:14:13,913 INFO L226 Difference]: Without dead ends: 3790 [2021-07-09 16:14:13,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:14:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2021-07-09 16:14:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 2692. [2021-07-09 16:14:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.7435897435897436) internal successors, (7383), 2691 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7383 transitions. [2021-07-09 16:14:13,977 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7383 transitions. Word has length 52 [2021-07-09 16:14:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:13,978 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 7383 transitions. [2021-07-09 16:14:13,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7383 transitions. [2021-07-09 16:14:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:13,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:13,983 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 16:14:14,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 16:14:14,208 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-07-09 16:14:14,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:14,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134387943] [2021-07-09 16:14:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:14,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:14,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134387943] [2021-07-09 16:14:14,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134387943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:14,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083980792] [2021-07-09 16:14:14,297 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 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 16:14:14,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 16:14:14,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:14,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083980792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:14,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:14,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 16:14:14,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456032299] [2021-07-09 16:14:14,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:14:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:14:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:14:14,614 INFO L87 Difference]: Start difference. First operand 2692 states and 7383 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:14,851 INFO L93 Difference]: Finished difference Result 3829 states and 10132 transitions. [2021-07-09 16:14:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:14:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:14,858 INFO L225 Difference]: With dead ends: 3829 [2021-07-09 16:14:14,859 INFO L226 Difference]: Without dead ends: 3677 [2021-07-09 16:14:14,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:14:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-07-09 16:14:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2779. [2021-07-09 16:14:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 2.7289416846652266) internal successors, (7581), 2778 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 7581 transitions. [2021-07-09 16:14:14,920 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 7581 transitions. Word has length 52 [2021-07-09 16:14:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:14,921 INFO L482 AbstractCegarLoop]: Abstraction has 2779 states and 7581 transitions. [2021-07-09 16:14:14,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 7581 transitions. [2021-07-09 16:14:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:14,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:14,926 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 16:14:15,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:15,151 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-07-09 16:14:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:15,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671756526] [2021-07-09 16:14:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:15,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671756526] [2021-07-09 16:14:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671756526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778897914] [2021-07-09 16:14:15,238 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 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 16:14:15,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:14:15,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778897914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:15,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:15,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:15,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460006245] [2021-07-09 16:14:15,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:15,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:15,569 INFO L87 Difference]: Start difference. First operand 2779 states and 7581 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:16,038 INFO L93 Difference]: Finished difference Result 4833 states and 12979 transitions. [2021-07-09 16:14:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:14:16,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:16,050 INFO L225 Difference]: With dead ends: 4833 [2021-07-09 16:14:16,051 INFO L226 Difference]: Without dead ends: 4451 [2021-07-09 16:14:16,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:14:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-07-09 16:14:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 2806. [2021-07-09 16:14:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 2.736898395721925) internal successors, (7677), 2805 states have internal predecessors, (7677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 7677 transitions. [2021-07-09 16:14:16,114 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 7677 transitions. Word has length 52 [2021-07-09 16:14:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:16,114 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 7677 transitions. [2021-07-09 16:14:16,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 7677 transitions. [2021-07-09 16:14:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:16,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:16,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:16,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 16:14:16,344 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:16,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-07-09 16:14:16,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:16,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968191106] [2021-07-09 16:14:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:16,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968191106] [2021-07-09 16:14:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968191106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717483949] [2021-07-09 16:14:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:16,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:16,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717483949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:16,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:16,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:16,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277736487] [2021-07-09 16:14:16,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:16,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:16,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:16,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:16,696 INFO L87 Difference]: Start difference. First operand 2806 states and 7677 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:17,019 INFO L93 Difference]: Finished difference Result 4312 states and 11204 transitions. [2021-07-09 16:14:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:14:17,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:17,028 INFO L225 Difference]: With dead ends: 4312 [2021-07-09 16:14:17,029 INFO L226 Difference]: Without dead ends: 4008 [2021-07-09 16:14:17,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:14:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-07-09 16:14:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 2978. [2021-07-09 16:14:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.702384951293248) internal successors, (8045), 2977 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8045 transitions. [2021-07-09 16:14:17,090 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8045 transitions. Word has length 52 [2021-07-09 16:14:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:17,090 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8045 transitions. [2021-07-09 16:14:17,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8045 transitions. [2021-07-09 16:14:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:17,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:17,096 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:17,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:17,318 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-07-09 16:14:17,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:17,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64041757] [2021-07-09 16:14:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:17,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64041757] [2021-07-09 16:14:17,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64041757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301152893] [2021-07-09 16:14:17,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:17,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:17,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:17,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301152893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:17,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:17,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:17,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457994693] [2021-07-09 16:14:17,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:17,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:17,632 INFO L87 Difference]: Start difference. First operand 2978 states and 8045 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:18,041 INFO L93 Difference]: Finished difference Result 4936 states and 12772 transitions. [2021-07-09 16:14:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:14:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:18,050 INFO L225 Difference]: With dead ends: 4936 [2021-07-09 16:14:18,050 INFO L226 Difference]: Without dead ends: 4632 [2021-07-09 16:14:18,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:14:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-07-09 16:14:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3133. [2021-07-09 16:14:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 2.7426564495530013) internal successors, (8590), 3132 states have internal predecessors, (8590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 8590 transitions. [2021-07-09 16:14:18,122 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 8590 transitions. Word has length 52 [2021-07-09 16:14:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:18,123 INFO L482 AbstractCegarLoop]: Abstraction has 3133 states and 8590 transitions. [2021-07-09 16:14:18,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 8590 transitions. [2021-07-09 16:14:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:18,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:18,133 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:18,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:18,349 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-07-09 16:14:18,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:18,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163396448] [2021-07-09 16:14:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:18,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:18,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163396448] [2021-07-09 16:14:18,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163396448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:18,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740609272] [2021-07-09 16:14:18,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:18,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:14:18,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:18,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740609272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:18,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:18,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:18,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428760937] [2021-07-09 16:14:18,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:18,769 INFO L87 Difference]: Start difference. First operand 3133 states and 8590 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:19,209 INFO L93 Difference]: Finished difference Result 5131 states and 13622 transitions. [2021-07-09 16:14:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:14:19,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:19,219 INFO L225 Difference]: With dead ends: 5131 [2021-07-09 16:14:19,219 INFO L226 Difference]: Without dead ends: 4827 [2021-07-09 16:14:19,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:14:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2021-07-09 16:14:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 3149. [2021-07-09 16:14:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 2.7461880559085134) internal successors, (8645), 3148 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 8645 transitions. [2021-07-09 16:14:19,291 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 8645 transitions. Word has length 52 [2021-07-09 16:14:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:19,291 INFO L482 AbstractCegarLoop]: Abstraction has 3149 states and 8645 transitions. [2021-07-09 16:14:19,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 8645 transitions. [2021-07-09 16:14:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:19,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:19,297 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:19,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:19,520 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-07-09 16:14:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233378883] [2021-07-09 16:14:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:19,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:19,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233378883] [2021-07-09 16:14:19,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233378883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:19,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302441002] [2021-07-09 16:14:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:19,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:14:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:19,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302441002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:19,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:19,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62746107] [2021-07-09 16:14:19,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:19,832 INFO L87 Difference]: Start difference. First operand 3149 states and 8645 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:20,578 INFO L93 Difference]: Finished difference Result 6785 states and 18364 transitions. [2021-07-09 16:14:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 16:14:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-09 16:14:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:20,591 INFO L225 Difference]: With dead ends: 6785 [2021-07-09 16:14:20,591 INFO L226 Difference]: Without dead ends: 6109 [2021-07-09 16:14:20,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=507, Invalid=1749, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 16:14:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-07-09 16:14:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 3407. [2021-07-09 16:14:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-07-09 16:14:20,674 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-07-09 16:14:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:20,674 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-07-09 16:14:20,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-07-09 16:14:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:20,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:20,680 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 16:14:20,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 16:14:20,903 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-07-09 16:14:20,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:20,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813261520] [2021-07-09 16:14:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:21,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:21,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813261520] [2021-07-09 16:14:21,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813261520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:21,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775270353] [2021-07-09 16:14:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:21,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 16:14:21,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:21,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775270353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:21,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:21,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 16:14:21,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240685574] [2021-07-09 16:14:21,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:14:21,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:14:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:14:21,342 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:21,528 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-07-09 16:14:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:14:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 16:14:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:21,535 INFO L225 Difference]: With dead ends: 4692 [2021-07-09 16:14:21,535 INFO L226 Difference]: Without dead ends: 4540 [2021-07-09 16:14:21,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:14:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-07-09 16:14:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-07-09 16:14:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-07-09 16:14:21,600 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-07-09 16:14:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:21,601 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-07-09 16:14:21,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-07-09 16:14:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:21,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:21,606 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 16:14:21,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:21,821 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:21,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-07-09 16:14:21,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:21,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506883665] [2021-07-09 16:14:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:21,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:21,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506883665] [2021-07-09 16:14:21,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506883665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:21,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747436927] [2021-07-09 16:14:21,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:21,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 16:14:21,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:22,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747436927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:22,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:22,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 16:14:22,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500328596] [2021-07-09 16:14:22,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:14:22,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:14:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:14:22,328 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:22,910 INFO L93 Difference]: Finished difference Result 6576 states and 17655 transitions. [2021-07-09 16:14:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:14:22,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 16:14:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:22,919 INFO L225 Difference]: With dead ends: 6576 [2021-07-09 16:14:22,919 INFO L226 Difference]: Without dead ends: 6018 [2021-07-09 16:14:22,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:14:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-07-09 16:14:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 3424. [2021-07-09 16:14:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 2.7788489628980426) internal successors, (9512), 3423 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 9512 transitions. [2021-07-09 16:14:22,980 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 9512 transitions. Word has length 57 [2021-07-09 16:14:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:22,980 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 9512 transitions. [2021-07-09 16:14:22,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 9512 transitions. [2021-07-09 16:14:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:22,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:22,985 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:23,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:14:23,185 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 5 times [2021-07-09 16:14:23,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:23,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085869672] [2021-07-09 16:14:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:23,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085869672] [2021-07-09 16:14:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085869672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068150] [2021-07-09 16:14:23,303 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 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 16:14:23,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 16:14:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:23,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:23,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:23,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:23,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:23,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 16:14:23,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091029115] [2021-07-09 16:14:23,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:14:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:23,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:14:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:14:23,659 INFO L87 Difference]: Start difference. First operand 3424 states and 9512 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:24,083 INFO L93 Difference]: Finished difference Result 5340 states and 14012 transitions. [2021-07-09 16:14:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:14:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 16:14:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:24,091 INFO L225 Difference]: With dead ends: 5340 [2021-07-09 16:14:24,091 INFO L226 Difference]: Without dead ends: 4948 [2021-07-09 16:14:24,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 464.3ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:14:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-07-09 16:14:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 3552. [2021-07-09 16:14:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 2.758941143339904) internal successors, (9797), 3551 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 9797 transitions. [2021-07-09 16:14:24,144 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 9797 transitions. Word has length 57 [2021-07-09 16:14:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:24,144 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 9797 transitions. [2021-07-09 16:14:24,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 9797 transitions. [2021-07-09 16:14:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:24,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:24,149 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:24,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:24,360 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 6 times [2021-07-09 16:14:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:24,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928458457] [2021-07-09 16:14:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:24,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:24,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928458457] [2021-07-09 16:14:24,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928458457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:24,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908949482] [2021-07-09 16:14:24,469 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 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 16:14:24,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 16:14:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:24,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:24,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908949482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:24,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:24,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 16:14:24,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34536235] [2021-07-09 16:14:24,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:14:24,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:14:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:14:24,834 INFO L87 Difference]: Start difference. First operand 3552 states and 9797 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:25,344 INFO L93 Difference]: Finished difference Result 5417 states and 14247 transitions. [2021-07-09 16:14:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:14:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 16:14:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:25,352 INFO L225 Difference]: With dead ends: 5417 [2021-07-09 16:14:25,353 INFO L226 Difference]: Without dead ends: 5265 [2021-07-09 16:14:25,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:14:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-07-09 16:14:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 3672. [2021-07-09 16:14:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 2.7709071097793516) internal successors, (10172), 3671 states have internal predecessors, (10172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 10172 transitions. [2021-07-09 16:14:25,402 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 10172 transitions. Word has length 57 [2021-07-09 16:14:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:25,402 INFO L482 AbstractCegarLoop]: Abstraction has 3672 states and 10172 transitions. [2021-07-09 16:14:25,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 10172 transitions. [2021-07-09 16:14:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:25,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:25,406 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:25,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 16:14:25,607 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:25,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 7 times [2021-07-09 16:14:25,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:25,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876735059] [2021-07-09 16:14:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:25,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:25,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876735059] [2021-07-09 16:14:25,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876735059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:25,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763217978] [2021-07-09 16:14:25,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:26,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763217978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:26,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:26,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 16:14:26,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757943558] [2021-07-09 16:14:26,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:14:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:14:26,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:14:26,044 INFO L87 Difference]: Start difference. First operand 3672 states and 10172 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:26,728 INFO L93 Difference]: Finished difference Result 6477 states and 17215 transitions. [2021-07-09 16:14:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:14:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-09 16:14:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:26,740 INFO L225 Difference]: With dead ends: 6477 [2021-07-09 16:14:26,741 INFO L226 Difference]: Without dead ends: 6085 [2021-07-09 16:14:26,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:14:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-07-09 16:14:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 3980. [2021-07-09 16:14:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 3979 states have (on average 2.80120633324956) internal successors, (11146), 3979 states have internal predecessors, (11146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 11146 transitions. [2021-07-09 16:14:26,832 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 11146 transitions. Word has length 57 [2021-07-09 16:14:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:26,832 INFO L482 AbstractCegarLoop]: Abstraction has 3980 states and 11146 transitions. [2021-07-09 16:14:26,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 11146 transitions. [2021-07-09 16:14:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:26,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:26,839 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:27,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:27,064 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 8 times [2021-07-09 16:14:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206828737] [2021-07-09 16:14:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:27,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:27,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206828737] [2021-07-09 16:14:27,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206828737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:27,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404503934] [2021-07-09 16:14:27,188 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 16:14:27,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:27,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:36,510 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 1639 [2021-07-09 16:14:36,895 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 1639 [2021-07-09 16:14:37,712 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 1653 [2021-07-09 16:14:38,148 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 1653 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown