/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/mainThreadTerminates.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 01:34:01,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 01:34:01,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 01:34:01,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 01:34:01,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 01:34:01,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 01:34:01,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 01:34:01,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 01:34:01,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 01:34:01,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 01:34:01,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 01:34:01,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 01:34:01,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 01:34:01,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 01:34:01,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 01:34:01,854 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 [2021-04-15 01:34:01,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 01:34:01,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 01:34:01,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 01:34:01,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 01:34:01,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 01:34:01,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 01:34:01,892 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 01:34:01,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 01:34:01,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 01:34:01,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 01:34:01,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 01:34:01,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 01:34:01,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 01:34:01,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 01:34:01,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 01:34:01,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 01:34:01,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 01:34:01,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 01:34:01,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 01:34:01,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 01:34:01,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 01:34:01,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 01:34:01,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 01:34:01,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 01:34:01,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 01:34:01,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 01:34:01,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 01:34:01,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 01:34:01,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 01:34:01,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 01:34:01,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 01:34:01,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 01:34:02,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 01:34:02,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 01:34:02,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 01:34:02,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 01:34:02,236 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 01:34:02,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/mainThreadTerminates.c [2021-04-15 01:34:02,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4aa56d8/34ffb77dcee444fb988fc7b7e6fa705a/FLAG002b51c49 [2021-04-15 01:34:02,705 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 01:34:02,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/mainThreadTerminates.c [2021-04-15 01:34:02,705 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-04-15 01:34:02,705 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-04-15 01:34:02,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4aa56d8/34ffb77dcee444fb988fc7b7e6fa705a/FLAG002b51c49 [2021-04-15 01:34:02,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4aa56d8/34ffb77dcee444fb988fc7b7e6fa705a [2021-04-15 01:34:02,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 01:34:02,745 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-15 01:34:02,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 01:34:02,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 01:34:02,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 01:34:02,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:02,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1163d89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02, skipping insertion in model container [2021-04-15 01:34:02,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:02,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 01:34:02,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 01:34:02,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 01:34:02,922 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 01:34:02,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 01:34:02,943 INFO L208 MainTranslator]: Completed translation [2021-04-15 01:34:02,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02 WrapperNode [2021-04-15 01:34:02,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 01:34:02,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 01:34:02,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 01:34:02,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 01:34:02,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:02,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:02,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 01:34:02,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 01:34:02,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 01:34:02,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 01:34:02,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:02,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:03,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:03,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:03,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:03,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:03,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (1/1) ... [2021-04-15 01:34:03,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 01:34:03,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 01:34:03,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 01:34:03,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 01:34:03,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (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 [2021-04-15 01:34:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 01:34:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure worker_thread [2021-04-15 01:34:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_thread [2021-04-15 01:34:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 01:34:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 01:34:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 01:34:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 01:34:03,088 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 01:34:03,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 01:34:03,261 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-04-15 01:34:03,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:34:03 BoogieIcfgContainer [2021-04-15 01:34:03,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 01:34:03,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 01:34:03,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 01:34:03,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 01:34:03,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 01:34:02" (1/3) ... [2021-04-15 01:34:03,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7569601c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:34:03, skipping insertion in model container [2021-04-15 01:34:03,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:34:02" (2/3) ... [2021-04-15 01:34:03,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7569601c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:34:03, skipping insertion in model container [2021-04-15 01:34:03,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:34:03" (3/3) ... [2021-04-15 01:34:03,283 INFO L111 eAbstractionObserver]: Analyzing ICFG mainThreadTerminates.c [2021-04-15 01:34:03,287 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 01:34:03,288 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 01:34:03,291 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 01:34:03,292 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 01:34:03,334 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,334 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,334 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,334 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,335 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,335 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,335 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,335 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,341 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,341 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,342 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,342 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,342 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,342 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,342 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,342 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,343 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,344 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,352 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,352 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,352 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,352 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,352 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,352 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:34:03,373 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-04-15 01:34:03,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 01:34:03,403 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 01:34:03,404 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 01:34:03,404 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 01:34:03,404 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 01:34:03,404 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 01:34:03,404 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 01:34:03,404 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 01:34:03,404 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 01:34:03,412 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 25 transitions, 55 flow [2021-04-15 01:34:03,429 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 68 states, 66 states have (on average 1.878787878787879) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 66 states have (on average 1.878787878787879) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 01:34:03,437 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:34:03,438 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:34:03,438 INFO L428 AbstractCegarLoop]: === Iteration 1 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-15 01:34:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:34:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash -905728310, now seen corresponding path program 1 times [2021-04-15 01:34:03,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:34:03,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145876588] [2021-04-15 01:34:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:34:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:34:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:03,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145876588] [2021-04-15 01:34:03,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:34:03,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 01:34:03,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663097817] [2021-04-15 01:34:03,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-04-15 01:34:03,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:34:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-04-15 01:34:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-04-15 01:34:03,625 INFO L87 Difference]: Start difference. First operand has 68 states, 66 states have (on average 1.878787878787879) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:34:03,638 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-04-15 01:34:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-04-15 01:34:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 01:34:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:34:03,645 INFO L225 Difference]: With dead ends: 56 [2021-04-15 01:34:03,646 INFO L226 Difference]: Without dead ends: 56 [2021-04-15 01:34:03,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-04-15 01:34:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-04-15 01:34:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-04-15 01:34:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 96 transitions. [2021-04-15 01:34:03,690 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 96 transitions. Word has length 12 [2021-04-15 01:34:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:34:03,690 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 96 transitions. [2021-04-15 01:34:03,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 96 transitions. [2021-04-15 01:34:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 01:34:03,693 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:34:03,693 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:34:03,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 01:34:03,694 INFO L428 AbstractCegarLoop]: === Iteration 2 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-15 01:34:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:34:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash -905728279, now seen corresponding path program 1 times [2021-04-15 01:34:03,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:34:03,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385065409] [2021-04-15 01:34:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:34:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:34:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385065409] [2021-04-15 01:34:03,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:34:03,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 01:34:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421413851] [2021-04-15 01:34:03,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:34:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:34:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:34:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:34:03,775 INFO L87 Difference]: Start difference. First operand 56 states and 96 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:34:03,799 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-04-15 01:34:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:34:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 01:34:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:34:03,806 INFO L225 Difference]: With dead ends: 74 [2021-04-15 01:34:03,806 INFO L226 Difference]: Without dead ends: 74 [2021-04-15 01:34:03,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:34:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-04-15 01:34:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-04-15 01:34:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 61 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 107 transitions. [2021-04-15 01:34:03,815 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 107 transitions. Word has length 12 [2021-04-15 01:34:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:34:03,816 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 107 transitions. [2021-04-15 01:34:03,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 107 transitions. [2021-04-15 01:34:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 01:34:03,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:34:03,817 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:34:03,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 01:34:03,817 INFO L428 AbstractCegarLoop]: === Iteration 3 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-15 01:34:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:34:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1287582195, now seen corresponding path program 1 times [2021-04-15 01:34:03,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:34:03,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079361534] [2021-04-15 01:34:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:34:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:34:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:03,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079361534] [2021-04-15 01:34:03,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646308267] [2021-04-15 01:34:03,900 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 [2021-04-15 01:34:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:34:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 01:34:03,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:34:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:34:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 01:34:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129506783] [2021-04-15 01:34:04,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 01:34:04,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:34:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 01:34:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 01:34:04,079 INFO L87 Difference]: Start difference. First operand 62 states and 107 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:34:04,147 INFO L93 Difference]: Finished difference Result 98 states and 173 transitions. [2021-04-15 01:34:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 01:34:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 01:34:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:34:04,149 INFO L225 Difference]: With dead ends: 98 [2021-04-15 01:34:04,149 INFO L226 Difference]: Without dead ends: 98 [2021-04-15 01:34:04,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 01:34:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-04-15 01:34:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-04-15 01:34:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.776470588235294) internal successors, (151), 85 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 151 transitions. [2021-04-15 01:34:04,158 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 151 transitions. Word has length 16 [2021-04-15 01:34:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:34:04,159 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 151 transitions. [2021-04-15 01:34:04,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 151 transitions. [2021-04-15 01:34:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 01:34:04,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:34:04,160 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:34:04,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 01:34:04,379 INFO L428 AbstractCegarLoop]: === Iteration 4 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-15 01:34:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:34:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash -223200463, now seen corresponding path program 2 times [2021-04-15 01:34:04,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:34:04,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048068928] [2021-04-15 01:34:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:34:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:34:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:04,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048068928] [2021-04-15 01:34:04,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359555498] [2021-04-15 01:34:04,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 01:34:04,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:34:04,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:34:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 01:34:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:34:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:04,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:34:04,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 01:34:04,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079800084] [2021-04-15 01:34:04,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 01:34:04,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:34:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 01:34:04,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 01:34:04,627 INFO L87 Difference]: Start difference. First operand 86 states and 151 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:34:04,714 INFO L93 Difference]: Finished difference Result 122 states and 217 transitions. [2021-04-15 01:34:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 01:34:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 01:34:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:34:04,717 INFO L225 Difference]: With dead ends: 122 [2021-04-15 01:34:04,718 INFO L226 Difference]: Without dead ends: 122 [2021-04-15 01:34:04,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:34:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-04-15 01:34:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-04-15 01:34:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.7889908256880733) internal successors, (195), 109 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 195 transitions. [2021-04-15 01:34:04,727 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 195 transitions. Word has length 20 [2021-04-15 01:34:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:34:04,728 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 195 transitions. [2021-04-15 01:34:04,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 195 transitions. [2021-04-15 01:34:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 01:34:04,737 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:34:04,738 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:34:04,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:34:04,938 INFO L428 AbstractCegarLoop]: === Iteration 5 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-15 01:34:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:34:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1916783019, now seen corresponding path program 3 times [2021-04-15 01:34:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:34:04,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069893305] [2021-04-15 01:34:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:34:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:34:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069893305] [2021-04-15 01:34:05,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083633841] [2021-04-15 01:34:05,022 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 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 [2021-04-15 01:34:05,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 01:34:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:34:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 01:34:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:34:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:34:05,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:34:05,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 01:34:05,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132544914] [2021-04-15 01:34:05,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 01:34:05,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:34:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 01:34:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 01:34:05,160 INFO L87 Difference]: Start difference. First operand 110 states and 195 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:34:05,239 INFO L93 Difference]: Finished difference Result 134 states and 239 transitions. [2021-04-15 01:34:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 01:34:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 01:34:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:34:05,241 INFO L225 Difference]: With dead ends: 134 [2021-04-15 01:34:05,241 INFO L226 Difference]: Without dead ends: 134 [2021-04-15 01:34:05,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-04-15 01:34:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-04-15 01:34:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-04-15 01:34:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.7969924812030076) internal successors, (239), 133 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 239 transitions. [2021-04-15 01:34:05,251 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 239 transitions. Word has length 24 [2021-04-15 01:34:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:34:05,251 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 239 transitions. [2021-04-15 01:34:05,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:34:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 239 transitions. [2021-04-15 01:34:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 01:34:05,252 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:34:05,252 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:34:05,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:34:05,473 INFO L428 AbstractCegarLoop]: === Iteration 6 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-15 01:34:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:34:05,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004039, now seen corresponding path program 4 times [2021-04-15 01:34:05,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:34:05,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056126044] [2021-04-15 01:34:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:34:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 01:34:05,485 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 01:34:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 01:34:05,493 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 01:34:05,511 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-15 01:34:05,512 INFO L652 BasicCegarLoop]: Counterexample might be feasible [2021-04-15 01:34:05,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 01:34:05,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 01:34:05 BasicIcfg [2021-04-15 01:34:05,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 01:34:05,537 INFO L168 Benchmark]: Toolchain (without parser) took 2790.92 ms. Allocated memory is still 348.1 MB. Free memory was 310.9 MB in the beginning and 177.1 MB in the end (delta: 133.8 MB). Peak memory consumption was 132.8 MB. Max. memory is 16.0 GB. [2021-04-15 01:34:05,537 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 348.1 MB. Free memory was 329.4 MB in the beginning and 329.4 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:34:05,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.15 ms. Allocated memory is still 348.1 MB. Free memory was 310.7 MB in the beginning and 327.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. [2021-04-15 01:34:05,538 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.72 ms. Allocated memory is still 348.1 MB. Free memory was 327.2 MB in the beginning and 331.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 01:34:05,538 INFO L168 Benchmark]: Boogie Preprocessor took 25.21 ms. Allocated memory is still 348.1 MB. Free memory was 331.2 MB in the beginning and 331.2 MB in the end (delta: 2.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:34:05,538 INFO L168 Benchmark]: RCFGBuilder took 244.18 ms. Allocated memory is still 348.1 MB. Free memory was 331.2 MB in the beginning and 318.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-04-15 01:34:05,538 INFO L168 Benchmark]: TraceAbstraction took 2270.94 ms. Allocated memory is still 348.1 MB. Free memory was 317.4 MB in the beginning and 177.1 MB in the end (delta: 140.3 MB). Peak memory consumption was 140.5 MB. Max. memory is 16.0 GB. [2021-04-15 01:34:05,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 348.1 MB. Free memory was 329.4 MB in the beginning and 329.4 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 198.15 ms. Allocated memory is still 348.1 MB. Free memory was 310.7 MB in the beginning and 327.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 45.72 ms. Allocated memory is still 348.1 MB. Free memory was 327.2 MB in the beginning and 331.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.21 ms. Allocated memory is still 348.1 MB. Free memory was 331.2 MB in the beginning and 331.2 MB in the end (delta: 2.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 244.18 ms. Allocated memory is still 348.1 MB. Free memory was 331.2 MB in the beginning and 318.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2270.94 ms. Allocated memory is still 348.1 MB. Free memory was 317.4 MB in the beginning and 177.1 MB in the end (delta: 140.3 MB). Peak memory consumption was 140.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: assertion can be violated assertion can be violated We found a FailurePath: [L26] 0 pthread_t thread; [L27] FCALL, FORK 0 pthread_create(&thread, NULL, worker_thread, NULL) VAL [arg={0:0}] [L18] 1 int x = 0; VAL [arg={0:0}, arg={0:0}, x=0] [L19] COND TRUE 1 x < 4 VAL [arg={0:0}, arg={0:0}, x=0] [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=1] [L19] COND TRUE 1 x < 4 VAL [arg={0:0}, arg={0:0}, x=1] [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=2] [L19] COND TRUE 1 x < 4 VAL [arg={0:0}, arg={0:0}, x=2] [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=3] [L19] COND TRUE 1 x < 4 VAL [arg={0:0}, arg={0:0}, x=3] [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=4] [L19] COND FALSE 1 !(x < 4) VAL [arg={0:0}, arg={0:0}, x=4] [L22] 1 CodeAnnotStmt[Assertion] VAL [arg={0:0}, arg={0:0}, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2111.1ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 20.8ms, AutomataDifference: 323.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 129 SDtfs, 170 SDslu, 363 SDs, 0 SdLazy, 104 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 258.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 36 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 47.9ms SsaConstructionTime, 114.8ms SatisfiabilityAnalysisTime, 619.3ms InterpolantComputationTime, 172 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 246 SizeOfPredicates, 12 NumberOfNonLiveVariables, 135 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/44 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...