/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-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:57:37,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:57:37,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:57:37,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 18:57:37,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:57:37,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:57:37,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:57:37,165 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 [2021-07-13 18:57:37,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:57:37,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:57:37,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:57:37,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:57:37,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:57:37,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:57:37,223 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:57:37,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:57:37,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:57:37,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:57:37,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:57:37,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:57:37,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:57:37,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:57:37,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:57:37,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:57:37,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:57:37,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:57:37,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:57:37,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:57:37,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:57:37,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:57:37,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:57:37,226 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:57:37,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:57:37,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:57:37,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:57:37,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:57:37,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:57:37,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:57:37,525 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:57:37,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-07-13 18:57:37,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33aae6b2/fa98d265e4bd4abca98f0a5cf2b166a2/FLAGc2f2f8185 [2021-07-13 18:57:38,022 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:57:38,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-07-13 18:57:38,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33aae6b2/fa98d265e4bd4abca98f0a5cf2b166a2/FLAGc2f2f8185 [2021-07-13 18:57:38,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33aae6b2/fa98d265e4bd4abca98f0a5cf2b166a2 [2021-07-13 18:57:38,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:57:38,310 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:57:38,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:57:38,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:57:38,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:57:38,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b57b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38, skipping insertion in model container [2021-07-13 18:57:38,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:57:38,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:57:38,506 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-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-07-13 18:57:38,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:57:38,790 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:57:38,797 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-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-07-13 18:57:38,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:57:38,860 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:57:38,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38 WrapperNode [2021-07-13 18:57:38,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:57:38,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:57:38,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:57:38,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:57:38,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:57:38,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:57:38,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:57:38,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:57:38,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (1/1) ... [2021-07-13 18:57:38,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:57:38,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:57:38,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:57:38,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:57:38,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (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 [2021-07-13 18:57:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:57:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:57:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 18:57:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-07-13 18:57:38,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-07-13 18:57:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:57:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:57:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:57:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:57:38,961 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:57:39,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:57:39,210 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-13 18:57:39,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:57:39 BoogieIcfgContainer [2021-07-13 18:57:39,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:57:39,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:57:39,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:57:39,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:57:39,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:57:38" (1/3) ... [2021-07-13 18:57:39,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a192674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:57:39, skipping insertion in model container [2021-07-13 18:57:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:38" (2/3) ... [2021-07-13 18:57:39,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a192674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:57:39, skipping insertion in model container [2021-07-13 18:57:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:57:39" (3/3) ... [2021-07-13 18:57:39,216 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-07-13 18:57:39,219 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:57:39,219 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:57:39,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 18:57:39,220 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:57:39,257 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,257 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,257 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,258 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,259 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,259 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,259 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,259 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,259 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,259 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,260 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,261 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,262 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,263 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,263 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,263 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,263 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,264 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,264 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,264 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,264 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,265 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,265 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,265 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,265 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:39,270 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-07-13 18:57:39,284 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 18:57:39,295 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:57:39,295 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:57:39,295 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:57:39,295 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:57:39,295 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:57:39,295 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:57:39,295 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:57:39,295 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:57:39,302 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 94 transitions, 196 flow [2021-07-13 18:57:39,325 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 18:57:39,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:39,337 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:39,337 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1922949937, now seen corresponding path program 1 times [2021-07-13 18:57:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:39,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57103395] [2021-07-13 18:57:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:39,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57103395] [2021-07-13 18:57:39,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57103395] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:39,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:57:39,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 18:57:39,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217019597] [2021-07-13 18:57:39,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-13 18:57:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-13 18:57:39,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 18:57:39,530 INFO L87 Difference]: Start difference. First operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 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 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:39,556 INFO L93 Difference]: Finished difference Result 342 states and 642 transitions. [2021-07-13 18:57:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-13 18:57:39,557 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-13 18:57:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:39,578 INFO L225 Difference]: With dead ends: 342 [2021-07-13 18:57:39,578 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 18:57:39,579 INFO L764 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 [2021-07-13 18:57:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 18:57:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-07-13 18:57:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.864864864864865) internal successors, (552), 296 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 552 transitions. [2021-07-13 18:57:39,669 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 552 transitions. Word has length 61 [2021-07-13 18:57:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:39,669 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 552 transitions. [2021-07-13 18:57:39,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 552 transitions. [2021-07-13 18:57:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 18:57:39,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:39,672 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:39,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:57:39,672 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 69507375, now seen corresponding path program 1 times [2021-07-13 18:57:39,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:39,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021308600] [2021-07-13 18:57:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:39,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:39,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021308600] [2021-07-13 18:57:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021308600] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:57:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:57:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997213100] [2021-07-13 18:57:39,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:57:39,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:39,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:57:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:57:39,798 INFO L87 Difference]: Start difference. First operand 297 states and 552 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:39,835 INFO L93 Difference]: Finished difference Result 357 states and 672 transitions. [2021-07-13 18:57:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:57:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-13 18:57:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:39,837 INFO L225 Difference]: With dead ends: 357 [2021-07-13 18:57:39,837 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 18:57:39,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:57:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 18:57:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 312. [2021-07-13 18:57:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.8713826366559485) internal successors, (582), 311 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 582 transitions. [2021-07-13 18:57:39,848 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 582 transitions. Word has length 61 [2021-07-13 18:57:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:39,848 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 582 transitions. [2021-07-13 18:57:39,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 582 transitions. [2021-07-13 18:57:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 18:57:39,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:39,856 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:39,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:57:39,857 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 518804448, now seen corresponding path program 1 times [2021-07-13 18:57:39,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:39,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044017990] [2021-07-13 18:57:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:39,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:39,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044017990] [2021-07-13 18:57:39,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044017990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:39,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745472512] [2021-07-13 18:57:39,993 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 [2021-07-13 18:57:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-07-13 18:57:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 18:57:40,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745472512] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:40,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 18:57:40,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-07-13 18:57:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922602753] [2021-07-13 18:57:40,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:57:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:57:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:57:40,252 INFO L87 Difference]: Start difference. First operand 312 states and 582 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:40,263 INFO L93 Difference]: Finished difference Result 438 states and 834 transitions. [2021-07-13 18:57:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:57:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-13 18:57:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:40,265 INFO L225 Difference]: With dead ends: 438 [2021-07-13 18:57:40,265 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 18:57:40,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:57:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 18:57:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 330. [2021-07-13 18:57:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.878419452887538) internal successors, (618), 329 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 618 transitions. [2021-07-13 18:57:40,274 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 618 transitions. Word has length 66 [2021-07-13 18:57:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:40,275 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 618 transitions. [2021-07-13 18:57:40,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 618 transitions. [2021-07-13 18:57:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-13 18:57:40,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:40,276 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:40,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 18:57:40,496 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:40,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash -393434949, now seen corresponding path program 1 times [2021-07-13 18:57:40,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:40,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638893151] [2021-07-13 18:57:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 18:57:40,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638893151] [2021-07-13 18:57:40,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638893151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551812005] [2021-07-13 18:57:40,531 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 [2021-07-13 18:57:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 18:57:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 18:57:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551812005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:40,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:40,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 18:57:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602502198] [2021-07-13 18:57:40,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:57:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:57:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:57:40,720 INFO L87 Difference]: Start difference. First operand 330 states and 618 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:40,752 INFO L93 Difference]: Finished difference Result 458 states and 874 transitions. [2021-07-13 18:57:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 18:57:40,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-07-13 18:57:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:40,754 INFO L225 Difference]: With dead ends: 458 [2021-07-13 18:57:40,754 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 18:57:40,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:57:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 18:57:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 410. [2021-07-13 18:57:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.902200488997555) internal successors, (778), 409 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 778 transitions. [2021-07-13 18:57:40,788 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 778 transitions. Word has length 74 [2021-07-13 18:57:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 778 transitions. [2021-07-13 18:57:40,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 778 transitions. [2021-07-13 18:57:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-07-13 18:57:40,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:40,790 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:41,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:41,007 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:41,008 INFO L82 PathProgramCache]: Analyzing trace with hash 402363818, now seen corresponding path program 2 times [2021-07-13 18:57:41,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:41,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565959528] [2021-07-13 18:57:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 18:57:41,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565959528] [2021-07-13 18:57:41,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565959528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174714820] [2021-07-13 18:57:41,049 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 [2021-07-13 18:57:41,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:57:41,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 18:57:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 18:57:41,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174714820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:41,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:41,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 18:57:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909027916] [2021-07-13 18:57:41,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:57:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:57:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:57:41,289 INFO L87 Difference]: Start difference. First operand 410 states and 778 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:41,325 INFO L93 Difference]: Finished difference Result 732 states and 1422 transitions. [2021-07-13 18:57:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 18:57:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-07-13 18:57:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:41,328 INFO L225 Difference]: With dead ends: 732 [2021-07-13 18:57:41,328 INFO L226 Difference]: Without dead ends: 732 [2021-07-13 18:57:41,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:57:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-13 18:57:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 594. [2021-07-13 18:57:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.9325463743676223) internal successors, (1146), 593 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1146 transitions. [2021-07-13 18:57:41,340 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1146 transitions. Word has length 79 [2021-07-13 18:57:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:41,341 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1146 transitions. [2021-07-13 18:57:41,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1146 transitions. [2021-07-13 18:57:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-13 18:57:41,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:41,342 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:41,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:41,556 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1060470651, now seen corresponding path program 3 times [2021-07-13 18:57:41,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:41,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973874259] [2021-07-13 18:57:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 18:57:41,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:41,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973874259] [2021-07-13 18:57:41,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973874259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:41,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708800720] [2021-07-13 18:57:41,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:41,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 18:57:41,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:57:41,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 18:57:41,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708800720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:41,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:41,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 18:57:41,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114908908] [2021-07-13 18:57:41,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:57:41,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:57:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:57:41,823 INFO L87 Difference]: Start difference. First operand 594 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 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) [2021-07-13 18:57:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:42,657 INFO L93 Difference]: Finished difference Result 1220 states and 2398 transitions. [2021-07-13 18:57:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 18:57:42,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 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 87 [2021-07-13 18:57:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:42,662 INFO L225 Difference]: With dead ends: 1220 [2021-07-13 18:57:42,662 INFO L226 Difference]: Without dead ends: 1220 [2021-07-13 18:57:42,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 18:57:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-07-13 18:57:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 938. [2021-07-13 18:57:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.9573105656350054) internal successors, (1834), 937 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1834 transitions. [2021-07-13 18:57:42,681 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1834 transitions. Word has length 87 [2021-07-13 18:57:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:42,681 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 1834 transitions. [2021-07-13 18:57:42,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 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) [2021-07-13 18:57:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1834 transitions. [2021-07-13 18:57:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-13 18:57:42,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:42,686 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:42,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:42,901 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1607478993, now seen corresponding path program 4 times [2021-07-13 18:57:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599714318] [2021-07-13 18:57:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-13 18:57:42,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599714318] [2021-07-13 18:57:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599714318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656182723] [2021-07-13 18:57:42,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:43,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:57:43,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:57:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-13 18:57:43,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656182723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:43,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:43,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 18:57:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560585750] [2021-07-13 18:57:43,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:57:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:43,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:57:43,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:57:43,167 INFO L87 Difference]: Start difference. First operand 938 states and 1834 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:43,232 INFO L93 Difference]: Finished difference Result 1194 states and 2346 transitions. [2021-07-13 18:57:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:57:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-13 18:57:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:43,236 INFO L225 Difference]: With dead ends: 1194 [2021-07-13 18:57:43,236 INFO L226 Difference]: Without dead ends: 1194 [2021-07-13 18:57:43,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:57:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-07-13 18:57:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1098. [2021-07-13 18:57:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 1.9635369188696445) internal successors, (2154), 1097 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2154 transitions. [2021-07-13 18:57:43,253 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2154 transitions. Word has length 100 [2021-07-13 18:57:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:43,253 INFO L482 AbstractCegarLoop]: Abstraction has 1098 states and 2154 transitions. [2021-07-13 18:57:43,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2154 transitions. [2021-07-13 18:57:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-13 18:57:43,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:43,256 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:43,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 18:57:43,473 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1071562496, now seen corresponding path program 5 times [2021-07-13 18:57:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:43,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380543686] [2021-07-13 18:57:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-13 18:57:43,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:43,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380543686] [2021-07-13 18:57:43,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380543686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:43,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831284821] [2021-07-13 18:57:43,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:43,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:57:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:57:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-13 18:57:43,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831284821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:43,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:43,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:57:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443704618] [2021-07-13 18:57:43,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:57:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:57:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:57:43,800 INFO L87 Difference]: Start difference. First operand 1098 states and 2154 transitions. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2021-07-13 18:57:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:43,885 INFO L93 Difference]: Finished difference Result 1354 states and 2666 transitions. [2021-07-13 18:57:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:57:43,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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 105 [2021-07-13 18:57:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:43,889 INFO L225 Difference]: With dead ends: 1354 [2021-07-13 18:57:43,889 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 18:57:43,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:57:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 18:57:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1258. [2021-07-13 18:57:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 1.9681782020684169) internal successors, (2474), 1257 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2474 transitions. [2021-07-13 18:57:43,906 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2474 transitions. Word has length 105 [2021-07-13 18:57:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:43,906 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 2474 transitions. [2021-07-13 18:57:43,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2021-07-13 18:57:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2474 transitions. [2021-07-13 18:57:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-13 18:57:43,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:43,908 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:44,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:44,125 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1117647921, now seen corresponding path program 6 times [2021-07-13 18:57:44,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:44,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912434668] [2021-07-13 18:57:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-07-13 18:57:44,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912434668] [2021-07-13 18:57:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912434668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026703542] [2021-07-13 18:57:44,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:44,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:57:44,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:57:44,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-07-13 18:57:44,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026703542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:44,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:44,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-07-13 18:57:44,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385190778] [2021-07-13 18:57:44,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:57:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:57:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:57:44,505 INFO L87 Difference]: Start difference. First operand 1258 states and 2474 transitions. Second operand has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:47,848 INFO L93 Difference]: Finished difference Result 2158 states and 4274 transitions. [2021-07-13 18:57:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-07-13 18:57:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-07-13 18:57:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:47,854 INFO L225 Difference]: With dead ends: 2158 [2021-07-13 18:57:47,854 INFO L226 Difference]: Without dead ends: 2158 [2021-07-13 18:57:47,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16756 ImplicationChecksByTransitivity, 3049.6ms TimeCoverageRelationStatistics Valid=7859, Invalid=30361, Unknown=0, NotChecked=0, Total=38220 [2021-07-13 18:57:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-07-13 18:57:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1762. [2021-07-13 18:57:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.9772856331629756) internal successors, (3482), 1761 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3482 transitions. [2021-07-13 18:57:47,885 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3482 transitions. Word has length 110 [2021-07-13 18:57:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:47,885 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3482 transitions. [2021-07-13 18:57:47,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3482 transitions. [2021-07-13 18:57:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-07-13 18:57:47,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:47,888 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:48,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:48,105 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1276635771, now seen corresponding path program 7 times [2021-07-13 18:57:48,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:48,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499565226] [2021-07-13 18:57:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-13 18:57:48,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:48,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499565226] [2021-07-13 18:57:48,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499565226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225800585] [2021-07-13 18:57:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:57:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-13 18:57:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225800585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:48,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:48,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:57:48,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977258642] [2021-07-13 18:57:48,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:57:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:57:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:57:48,490 INFO L87 Difference]: Start difference. First operand 1762 states and 3482 transitions. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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) [2021-07-13 18:57:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:48,627 INFO L93 Difference]: Finished difference Result 2082 states and 4122 transitions. [2021-07-13 18:57:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:57:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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 123 [2021-07-13 18:57:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:48,633 INFO L225 Difference]: With dead ends: 2082 [2021-07-13 18:57:48,633 INFO L226 Difference]: Without dead ends: 2082 [2021-07-13 18:57:48,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:57:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-07-13 18:57:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1962. [2021-07-13 18:57:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.979602243753187) internal successors, (3882), 1961 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3882 transitions. [2021-07-13 18:57:48,697 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3882 transitions. Word has length 123 [2021-07-13 18:57:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:48,697 INFO L482 AbstractCegarLoop]: Abstraction has 1962 states and 3882 transitions. [2021-07-13 18:57:48,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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) [2021-07-13 18:57:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3882 transitions. [2021-07-13 18:57:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-07-13 18:57:48,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:48,703 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 18:57:48,921 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1626379628, now seen corresponding path program 8 times [2021-07-13 18:57:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:48,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132556945] [2021-07-13 18:57:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-13 18:57:49,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132556945] [2021-07-13 18:57:49,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132556945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:49,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117276993] [2021-07-13 18:57:49,081 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 [2021-07-13 18:57:49,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:57:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:57:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-13 18:57:49,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117276993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:49,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:49,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:57:49,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775706440] [2021-07-13 18:57:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:57:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:57:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:57:49,319 INFO L87 Difference]: Start difference. First operand 1962 states and 3882 transitions. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:49,490 INFO L93 Difference]: Finished difference Result 2282 states and 4522 transitions. [2021-07-13 18:57:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:57:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-07-13 18:57:49,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:49,497 INFO L225 Difference]: With dead ends: 2282 [2021-07-13 18:57:49,497 INFO L226 Difference]: Without dead ends: 2282 [2021-07-13 18:57:49,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:57:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-07-13 18:57:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2162. [2021-07-13 18:57:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.98149005090236) internal successors, (4282), 2161 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 4282 transitions. [2021-07-13 18:57:49,533 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 4282 transitions. Word has length 128 [2021-07-13 18:57:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:49,534 INFO L482 AbstractCegarLoop]: Abstraction has 2162 states and 4282 transitions. [2021-07-13 18:57:49,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 4282 transitions. [2021-07-13 18:57:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-07-13 18:57:49,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:49,537 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:49,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:49,755 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1177688347, now seen corresponding path program 9 times [2021-07-13 18:57:49,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:49,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925008083] [2021-07-13 18:57:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-07-13 18:57:49,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925008083] [2021-07-13 18:57:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925008083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773450987] [2021-07-13 18:57:49,918 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 [2021-07-13 18:57:50,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 18:57:50,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:57:50,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-07-13 18:57:50,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773450987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:50,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:50,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-07-13 18:57:50,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812024702] [2021-07-13 18:57:50,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 18:57:50,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:50,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 18:57:50,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:57:50,286 INFO L87 Difference]: Start difference. First operand 2162 states and 4282 transitions. Second operand has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 28 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) [2021-07-13 18:58:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:00,541 INFO L93 Difference]: Finished difference Result 3336 states and 6630 transitions. [2021-07-13 18:58:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2021-07-13 18:58:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 28 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) Word has length 133 [2021-07-13 18:58:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:00,552 INFO L225 Difference]: With dead ends: 3336 [2021-07-13 18:58:00,552 INFO L226 Difference]: Without dead ends: 3336 [2021-07-13 18:58:00,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66570 ImplicationChecksByTransitivity, 9531.8ms TimeCoverageRelationStatistics Valid=27129, Invalid=114623, Unknown=0, NotChecked=0, Total=141752 [2021-07-13 18:58:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-07-13 18:58:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2826. [2021-07-13 18:58:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 1.9858407079646017) internal successors, (5610), 2825 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 5610 transitions. [2021-07-13 18:58:00,603 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 5610 transitions. Word has length 133 [2021-07-13 18:58:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:00,603 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 5610 transitions. [2021-07-13 18:58:00,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 28 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) [2021-07-13 18:58:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 5610 transitions. [2021-07-13 18:58:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-07-13 18:58:00,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:00,607 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:00,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:00,821 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:00,821 INFO L82 PathProgramCache]: Analyzing trace with hash 556479399, now seen corresponding path program 10 times [2021-07-13 18:58:00,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:00,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305812099] [2021-07-13 18:58:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-07-13 18:58:00,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:00,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305812099] [2021-07-13 18:58:00,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305812099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:00,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381646487] [2021-07-13 18:58:00,995 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 [2021-07-13 18:58:01,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:58:01,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:58:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:58:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-07-13 18:58:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381646487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:01,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:01,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 18:58:01,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028245052] [2021-07-13 18:58:01,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:58:01,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:01,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:58:01,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:58:01,294 INFO L87 Difference]: Start difference. First operand 2826 states and 5610 transitions. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:01,532 INFO L93 Difference]: Finished difference Result 3210 states and 6378 transitions. [2021-07-13 18:58:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:58:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-07-13 18:58:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:01,540 INFO L225 Difference]: With dead ends: 3210 [2021-07-13 18:58:01,540 INFO L226 Difference]: Without dead ends: 3210 [2021-07-13 18:58:01,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:58:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-07-13 18:58:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3066. [2021-07-13 18:58:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 3065 states have (on average 1.9869494290375205) internal successors, (6090), 3065 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 6090 transitions. [2021-07-13 18:58:01,578 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 6090 transitions. Word has length 146 [2021-07-13 18:58:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:01,578 INFO L482 AbstractCegarLoop]: Abstraction has 3066 states and 6090 transitions. [2021-07-13 18:58:01,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 6090 transitions. [2021-07-13 18:58:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-07-13 18:58:01,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:01,582 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:01,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 18:58:01,798 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:01,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1605028246, now seen corresponding path program 11 times [2021-07-13 18:58:01,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:01,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817579775] [2021-07-13 18:58:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-07-13 18:58:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817579775] [2021-07-13 18:58:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817579775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041699689] [2021-07-13 18:58:01,975 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 [2021-07-13 18:58:02,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 18:58:02,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:58:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:58:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-07-13 18:58:02,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041699689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:02,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:02,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-07-13 18:58:02,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56084431] [2021-07-13 18:58:02,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 18:58:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:02,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 18:58:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:58:02,401 INFO L87 Difference]: Start difference. First operand 3066 states and 6090 transitions. Second operand has 34 states, 34 states have (on average 4.970588235294118) internal successors, (169), 34 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:23,283 INFO L93 Difference]: Finished difference Result 4444 states and 8846 transitions. [2021-07-13 18:58:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-07-13 18:58:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.970588235294118) internal successors, (169), 34 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-07-13 18:58:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:23,294 INFO L225 Difference]: With dead ends: 4444 [2021-07-13 18:58:23,294 INFO L226 Difference]: Without dead ends: 4444 [2021-07-13 18:58:23,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151458 ImplicationChecksByTransitivity, 19828.5ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-07-13 18:58:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-07-13 18:58:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 3850. [2021-07-13 18:58:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 3849 states have (on average 1.9896076903091713) internal successors, (7658), 3849 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 7658 transitions. [2021-07-13 18:58:23,362 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 7658 transitions. Word has length 151 [2021-07-13 18:58:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:23,362 INFO L482 AbstractCegarLoop]: Abstraction has 3850 states and 7658 transitions. [2021-07-13 18:58:23,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 4.970588235294118) internal successors, (169), 34 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 7658 transitions. [2021-07-13 18:58:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-07-13 18:58:23,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:23,368 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:23,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 18:58:23,582 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1225339166, now seen corresponding path program 12 times [2021-07-13 18:58:23,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:23,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577936214] [2021-07-13 18:58:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-07-13 18:58:23,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577936214] [2021-07-13 18:58:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577936214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735253529] [2021-07-13 18:58:23,878 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 [2021-07-13 18:58:23,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 18:58:23,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:58:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:58:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-07-13 18:58:24,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735253529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:24,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:24,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-07-13 18:58:24,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138533398] [2021-07-13 18:58:24,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 18:58:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 18:58:24,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:58:24,340 INFO L87 Difference]: Start difference. First operand 3850 states and 7658 transitions. Second operand has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:58,176 INFO L93 Difference]: Finished difference Result 5362 states and 10682 transitions. [2021-07-13 18:58:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 701 states. [2021-07-13 18:58:58,176 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-07-13 18:58:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:58,187 INFO L225 Difference]: With dead ends: 5362 [2021-07-13 18:58:58,187 INFO L226 Difference]: Without dead ends: 5362 [2021-07-13 18:58:58,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 716 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253004 ImplicationChecksByTransitivity, 32151.8ms TimeCoverageRelationStatistics Valid=92780, Invalid=422026, Unknown=0, NotChecked=0, Total=514806 [2021-07-13 18:58:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2021-07-13 18:58:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4714. [2021-07-13 18:58:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 1.991512836834288) internal successors, (9386), 4713 states have internal predecessors, (9386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 9386 transitions. [2021-07-13 18:58:58,266 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 9386 transitions. Word has length 164 [2021-07-13 18:58:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:58,266 INFO L482 AbstractCegarLoop]: Abstraction has 4714 states and 9386 transitions. [2021-07-13 18:58:58,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 9386 transitions. [2021-07-13 18:58:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-07-13 18:58:58,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:58,273 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:58,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 18:58:58,490 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1616708884, now seen corresponding path program 13 times [2021-07-13 18:58:58,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:58,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971640824] [2021-07-13 18:58:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-13 18:58:58,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:58,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971640824] [2021-07-13 18:58:58,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971640824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:58,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314994723] [2021-07-13 18:58:58,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:58:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-13 18:58:59,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314994723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:59,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:59,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-13 18:58:59,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068603571] [2021-07-13 18:58:59,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 18:58:59,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:59,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 18:58:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:58:59,008 INFO L87 Difference]: Start difference. First operand 4714 states and 9386 transitions. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:59,377 INFO L93 Difference]: Finished difference Result 5226 states and 10410 transitions. [2021-07-13 18:58:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 18:58:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-07-13 18:58:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:59,389 INFO L225 Difference]: With dead ends: 5226 [2021-07-13 18:58:59,389 INFO L226 Difference]: Without dead ends: 5226 [2021-07-13 18:58:59,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 18:58:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-07-13 18:58:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5034. [2021-07-13 18:58:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 1.9920524538048878) internal successors, (10026), 5033 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 10026 transitions. [2021-07-13 18:58:59,448 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 10026 transitions. Word has length 177 [2021-07-13 18:58:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:59,449 INFO L482 AbstractCegarLoop]: Abstraction has 5034 states and 10026 transitions. [2021-07-13 18:58:59,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:58:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 10026 transitions. [2021-07-13 18:58:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-07-13 18:58:59,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:59,455 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:59,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:59,672 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1954781411, now seen corresponding path program 14 times [2021-07-13 18:58:59,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:59,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980975739] [2021-07-13 18:58:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-13 18:58:59,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980975739] [2021-07-13 18:58:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980975739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427771783] [2021-07-13 18:58:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:59:00,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:59:00,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:59:00,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 18:59:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:59:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-13 18:59:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427771783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:00,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:59:00,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-07-13 18:59:00,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616845063] [2021-07-13 18:59:00,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 18:59:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:59:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 18:59:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:59:00,242 INFO L87 Difference]: Start difference. First operand 5034 states and 10026 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:59:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:59:00,681 INFO L93 Difference]: Finished difference Result 5546 states and 11050 transitions. [2021-07-13 18:59:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 18:59:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-07-13 18:59:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:59:00,689 INFO L225 Difference]: With dead ends: 5546 [2021-07-13 18:59:00,689 INFO L226 Difference]: Without dead ends: 5546 [2021-07-13 18:59:00,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 18:59:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-07-13 18:59:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5354. [2021-07-13 18:59:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 1.9925275546422567) internal successors, (10666), 5353 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:59:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 10666 transitions. [2021-07-13 18:59:00,746 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 10666 transitions. Word has length 182 [2021-07-13 18:59:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:59:00,746 INFO L482 AbstractCegarLoop]: Abstraction has 5354 states and 10666 transitions. [2021-07-13 18:59:00,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:59:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 10666 transitions. [2021-07-13 18:59:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-07-13 18:59:00,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:59:00,757 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:59:00,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 18:59:00,974 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:59:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:59:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1102843508, now seen corresponding path program 15 times [2021-07-13 18:59:00,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:59:00,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678273983] [2021-07-13 18:59:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:59:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:59:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-07-13 18:59:01,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:59:01,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678273983] [2021-07-13 18:59:01,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678273983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:01,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792813768] [2021-07-13 18:59:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:59:01,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:59:01,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:59:01,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:59:01,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:59:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-07-13 18:59:02,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792813768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:02,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:59:02,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2021-07-13 18:59:02,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770078948] [2021-07-13 18:59:02,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 18:59:02,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:59:02,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 18:59:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:59:02,019 INFO L87 Difference]: Start difference. First operand 5354 states and 10666 transitions. Second operand has 46 states, 46 states have (on average 4.456521739130435) internal successors, (205), 46 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:00:08,569 INFO L93 Difference]: Finished difference Result 7140 states and 14238 transitions. [2021-07-13 19:00:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2021-07-13 19:00:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.456521739130435) internal successors, (205), 46 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-07-13 19:00:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:00:08,582 INFO L225 Difference]: With dead ends: 7140 [2021-07-13 19:00:08,582 INFO L226 Difference]: Without dead ends: 7140 [2021-07-13 19:00:08,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2193 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 1032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534325 ImplicationChecksByTransitivity, 63464.8ms TimeCoverageRelationStatistics Valid=187686, Invalid=880436, Unknown=0, NotChecked=0, Total=1068122 [2021-07-13 19:00:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-07-13 19:00:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 6378. [2021-07-13 19:00:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6377 states have (on average 1.9937274580523758) internal successors, (12714), 6377 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 12714 transitions. [2021-07-13 19:00:08,711 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 12714 transitions. Word has length 187 [2021-07-13 19:00:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:00:08,711 INFO L482 AbstractCegarLoop]: Abstraction has 6378 states and 12714 transitions. [2021-07-13 19:00:08,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 4.456521739130435) internal successors, (205), 46 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 12714 transitions. [2021-07-13 19:00:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-07-13 19:00:08,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:00:08,725 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:00:08,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:00:08,946 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:00:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:00:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash 493157464, now seen corresponding path program 16 times [2021-07-13 19:00:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:00:08,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785549934] [2021-07-13 19:00:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:00:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:00:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-07-13 19:00:09,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:00:09,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785549934] [2021-07-13 19:00:09,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785549934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:09,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426647273] [2021-07-13 19:00:09,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:00:09,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:00:09,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:00:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:00:09,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:00:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-07-13 19:00:09,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426647273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:09,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:00:09,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-13 19:00:09,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929051172] [2021-07-13 19:00:09,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 19:00:09,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:00:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 19:00:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:00:09,980 INFO L87 Difference]: Start difference. First operand 6378 states and 12714 transitions. Second operand has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:00:10,582 INFO L93 Difference]: Finished difference Result 6954 states and 13866 transitions. [2021-07-13 19:00:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:00:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-07-13 19:00:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:00:10,592 INFO L225 Difference]: With dead ends: 6954 [2021-07-13 19:00:10,593 INFO L226 Difference]: Without dead ends: 6954 [2021-07-13 19:00:10,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 884.9ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 19:00:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-07-13 19:00:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 6738. [2021-07-13 19:00:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.9940626391568947) internal successors, (13434), 6737 states have internal predecessors, (13434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 13434 transitions. [2021-07-13 19:00:10,676 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 13434 transitions. Word has length 200 [2021-07-13 19:00:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:00:10,676 INFO L482 AbstractCegarLoop]: Abstraction has 6738 states and 13434 transitions. [2021-07-13 19:00:10,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 13434 transitions. [2021-07-13 19:00:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-07-13 19:00:10,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:00:10,688 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:00:10,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:00:10,905 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:00:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:00:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -771856121, now seen corresponding path program 17 times [2021-07-13 19:00:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:00:10,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230229043] [2021-07-13 19:00:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:00:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:00:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-07-13 19:00:11,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:00:11,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230229043] [2021-07-13 19:00:11,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230229043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:11,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342662712] [2021-07-13 19:00:11,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:00:11,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-13 19:00:11,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:00:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:00:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:00:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-07-13 19:00:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342662712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:11,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:00:11,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 52 [2021-07-13 19:00:11,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49479156] [2021-07-13 19:00:11,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-13 19:00:11,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:00:11,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-13 19:00:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:00:11,968 INFO L87 Difference]: Start difference. First operand 6738 states and 13434 transitions. Second operand has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:40,610 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 19:01:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:01:58,855 INFO L93 Difference]: Finished difference Result 8728 states and 17414 transitions. [2021-07-13 19:01:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1301 states. [2021-07-13 19:01:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-07-13 19:01:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:01:58,865 INFO L225 Difference]: With dead ends: 8728 [2021-07-13 19:01:58,865 INFO L226 Difference]: Without dead ends: 8728 [2021-07-13 19:01:58,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2785 GetRequests, 1462 SyntacticMatches, 0 SemanticMatches, 1323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886582 ImplicationChecksByTransitivity, 101633.6ms TimeCoverageRelationStatistics Valid=303321, Invalid=1450979, Unknown=0, NotChecked=0, Total=1754300 [2021-07-13 19:01:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-07-13 19:01:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 7882. [2021-07-13 19:01:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 1.9949245019667554) internal successors, (15722), 7881 states have internal predecessors, (15722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:01:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 15722 transitions. [2021-07-13 19:01:59,305 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 15722 transitions. Word has length 205 [2021-07-13 19:01:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:01:59,306 INFO L482 AbstractCegarLoop]: Abstraction has 7882 states and 15722 transitions. [2021-07-13 19:01:59,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:01:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 15722 transitions. [2021-07-13 19:01:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-07-13 19:01:59,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:01:59,344 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:01:59,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:01:59,573 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:01:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:01:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash -522613101, now seen corresponding path program 18 times [2021-07-13 19:01:59,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:01:59,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165154289] [2021-07-13 19:01:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:01:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-07-13 19:02:00,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:00,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165154289] [2021-07-13 19:02:00,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165154289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:00,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335118527] [2021-07-13 19:02:00,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:00,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 19:02:00,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:02:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-07-13 19:02:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335118527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:00,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:00,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2021-07-13 19:02:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598794799] [2021-07-13 19:02:00,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-07-13 19:02:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-07-13 19:02:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2601, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:02:00,840 INFO L87 Difference]: Start difference. First operand 7882 states and 15722 transitions. Second operand has 56 states, 56 states have (on average 4.214285714285714) internal successors, (236), 56 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:04:31,231 INFO L93 Difference]: Finished difference Result 10006 states and 19970 transitions. [2021-07-13 19:04:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1538 states. [2021-07-13 19:04:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.214285714285714) internal successors, (236), 56 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-07-13 19:04:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:04:31,249 INFO L225 Difference]: With dead ends: 10006 [2021-07-13 19:04:31,249 INFO L226 Difference]: Without dead ends: 10006 [2021-07-13 19:04:31,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3270 GetRequests, 1708 SyntacticMatches, 0 SemanticMatches, 1562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243135 ImplicationChecksByTransitivity, 142441.2ms TimeCoverageRelationStatistics Valid=418136, Invalid=2026396, Unknown=0, NotChecked=0, Total=2444532 [2021-07-13 19:04:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2021-07-13 19:04:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 9106. [2021-07-13 19:04:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9106 states, 9105 states have (on average 1.9956068094453596) internal successors, (18170), 9105 states have internal predecessors, (18170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9106 states to 9106 states and 18170 transitions. [2021-07-13 19:04:31,714 INFO L78 Accepts]: Start accepts. Automaton has 9106 states and 18170 transitions. Word has length 218 [2021-07-13 19:04:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:04:31,715 INFO L482 AbstractCegarLoop]: Abstraction has 9106 states and 18170 transitions. [2021-07-13 19:04:31,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 4.214285714285714) internal successors, (236), 56 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9106 states and 18170 transitions. [2021-07-13 19:04:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-07-13 19:04:31,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:04:31,742 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:04:31,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:04:31,942 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:04:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:04:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1286709155, now seen corresponding path program 19 times [2021-07-13 19:04:31,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:04:31,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617554774] [2021-07-13 19:04:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:04:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:04:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-13 19:04:32,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:04:32,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617554774] [2021-07-13 19:04:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617554774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:32,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944662584] [2021-07-13 19:04:32,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:04:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:04:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 19:04:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:04:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-13 19:04:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944662584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:33,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:04:33,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-07-13 19:04:33,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901875500] [2021-07-13 19:04:33,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 19:04:33,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:04:33,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 19:04:33,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:04:33,029 INFO L87 Difference]: Start difference. First operand 9106 states and 18170 transitions. Second operand has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:04:33,795 INFO L93 Difference]: Finished difference Result 9810 states and 19578 transitions. [2021-07-13 19:04:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:04:33,795 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-07-13 19:04:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:04:33,807 INFO L225 Difference]: With dead ends: 9810 [2021-07-13 19:04:33,807 INFO L226 Difference]: Without dead ends: 9810 [2021-07-13 19:04:33,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1207.6ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 19:04:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-13 19:04:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 9546. [2021-07-13 19:04:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9546 states, 9545 states have (on average 1.995809324253536) internal successors, (19050), 9545 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9546 states to 9546 states and 19050 transitions. [2021-07-13 19:04:33,918 INFO L78 Accepts]: Start accepts. Automaton has 9546 states and 19050 transitions. Word has length 231 [2021-07-13 19:04:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:04:33,918 INFO L482 AbstractCegarLoop]: Abstraction has 9546 states and 19050 transitions. [2021-07-13 19:04:33,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 9546 states and 19050 transitions. [2021-07-13 19:04:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-07-13 19:04:33,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:04:33,929 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:04:34,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:04:34,270 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:04:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:04:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash 528686542, now seen corresponding path program 20 times [2021-07-13 19:04:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:04:34,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661784448] [2021-07-13 19:04:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:04:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:04:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-13 19:04:34,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:04:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661784448] [2021-07-13 19:04:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661784448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872100837] [2021-07-13 19:04:34,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:04:34,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:04:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:04:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:04:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:04:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-07-13 19:04:35,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872100837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:35,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:04:35,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-07-13 19:04:35,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996228973] [2021-07-13 19:04:35,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 19:04:35,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:04:35,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 19:04:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:04:35,164 INFO L87 Difference]: Start difference. First operand 9546 states and 19050 transitions. Second operand has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:04:36,173 INFO L93 Difference]: Finished difference Result 9986 states and 19930 transitions. [2021-07-13 19:04:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 19:04:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-07-13 19:04:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:04:36,182 INFO L225 Difference]: With dead ends: 9986 [2021-07-13 19:04:36,182 INFO L226 Difference]: Without dead ends: 9986 [2021-07-13 19:04:36,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1187.2ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:04:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-07-13 19:04:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2021-07-13 19:04:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.9959939909864797) internal successors, (19930), 9985 states have internal predecessors, (19930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 19930 transitions. [2021-07-13 19:04:36,276 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 19930 transitions. Word has length 236 [2021-07-13 19:04:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:04:36,276 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 19930 transitions. [2021-07-13 19:04:36,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 19930 transitions. [2021-07-13 19:04:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-07-13 19:04:36,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:04:36,287 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:04:36,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:04:36,504 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:04:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:04:36,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2022711037, now seen corresponding path program 21 times [2021-07-13 19:04:36,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:04:36,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433755336] [2021-07-13 19:04:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:04:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:04:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 1340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:04:37,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:04:37,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433755336] [2021-07-13 19:04:37,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433755336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:37,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014288766] [2021-07-13 19:04:37,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:04:37,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:04:37,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:04:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:04:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:04:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-13 19:04:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014288766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:38,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:04:38,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-07-13 19:04:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748070753] [2021-07-13 19:04:38,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-07-13 19:04:38,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:04:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-07-13 19:04:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:04:38,159 INFO L87 Difference]: Start difference. First operand 9986 states and 19930 transitions. Second operand has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:04:59,880 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 19:05:53,022 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 19:05:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:05:56,963 INFO L93 Difference]: Finished difference Result 170472 states and 340902 transitions. [2021-07-13 19:05:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1102 states. [2021-07-13 19:05:56,963 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-07-13 19:05:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:05:57,257 INFO L225 Difference]: With dead ends: 170472 [2021-07-13 19:05:57,258 INFO L226 Difference]: Without dead ends: 170472 [2021-07-13 19:05:57,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2400 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 1123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635937 ImplicationChecksByTransitivity, 66114.7ms TimeCoverageRelationStatistics Valid=255553, Invalid=1008947, Unknown=0, NotChecked=0, Total=1264500 [2021-07-13 19:05:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170472 states. [2021-07-13 19:05:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170472 to 10890. [2021-07-13 19:05:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10890 states, 10889 states have (on average 1.9963265680962439) internal successors, (21738), 10889 states have internal predecessors, (21738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:05:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10890 states to 10890 states and 21738 transitions. [2021-07-13 19:05:58,567 INFO L78 Accepts]: Start accepts. Automaton has 10890 states and 21738 transitions. Word has length 241 [2021-07-13 19:05:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:05:58,567 INFO L482 AbstractCegarLoop]: Abstraction has 10890 states and 21738 transitions. [2021-07-13 19:05:58,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:05:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 10890 states and 21738 transitions. [2021-07-13 19:05:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-07-13 19:05:58,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:05:58,578 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:05:58,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:05:58,794 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:05:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:05:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash -17430824, now seen corresponding path program 22 times [2021-07-13 19:05:58,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:05:58,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331339254] [2021-07-13 19:05:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:05:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:05:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 1421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:05:59,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:05:59,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331339254] [2021-07-13 19:05:59,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331339254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:05:59,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961903966] [2021-07-13 19:05:59,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:05:59,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:05:59,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:05:59,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:05:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:06:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-13 19:06:00,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961903966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:06:00,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:06:00,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2021-07-13 19:06:00,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612978144] [2021-07-13 19:06:00,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:06:00,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:06:00,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:06:00,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=4148, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:06:00,701 INFO L87 Difference]: Start difference. First operand 10890 states and 21738 transitions. Second operand has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:07:09,810 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 19:07:13,312 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:07:51,003 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:07:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:07:57,150 INFO L93 Difference]: Finished difference Result 211585 states and 423128 transitions. [2021-07-13 19:07:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1363 states. [2021-07-13 19:07:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-07-13 19:07:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:07:57,593 INFO L225 Difference]: With dead ends: 211585 [2021-07-13 19:07:57,594 INFO L226 Difference]: Without dead ends: 211585 [2021-07-13 19:07:57,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2928 GetRequests, 1542 SyntacticMatches, 0 SemanticMatches, 1386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983344 ImplicationChecksByTransitivity, 97304.7ms TimeCoverageRelationStatistics Valid=390931, Invalid=1534225, Unknown=0, NotChecked=0, Total=1925156 [2021-07-13 19:07:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211585 states. [2021-07-13 19:07:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211585 to 11794. [2021-07-13 19:07:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11793 states have (on average 1.9966081573814976) internal successors, (23546), 11793 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:07:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 23546 transitions. [2021-07-13 19:07:59,277 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 23546 transitions. Word has length 249 [2021-07-13 19:07:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:07:59,277 INFO L482 AbstractCegarLoop]: Abstraction has 11794 states and 23546 transitions. [2021-07-13 19:07:59,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:07:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 23546 transitions. [2021-07-13 19:07:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-07-13 19:07:59,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:07:59,289 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:07:59,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:07:59,506 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:07:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:07:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -418389069, now seen corresponding path program 23 times [2021-07-13 19:07:59,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:07:59,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895337748] [2021-07-13 19:07:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:07:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:08:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:08:00,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:08:00,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895337748] [2021-07-13 19:08:00,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895337748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:08:00,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238724796] [2021-07-13 19:08:00,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:08:00,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-13 19:08:00,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:08:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:08:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:08:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-13 19:08:01,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238724796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:08:01,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:08:01,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-07-13 19:08:01,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171972332] [2021-07-13 19:08:01,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-13 19:08:01,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:08:01,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-13 19:08:01,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4653, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 19:08:01,632 INFO L87 Difference]: Start difference. First operand 11794 states and 23546 transitions. Second operand has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:08:48,219 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:09:00,915 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 19:09:45,117 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 19:11:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:03,007 INFO L93 Difference]: Finished difference Result 257593 states and 515144 transitions. [2021-07-13 19:11:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1665 states. [2021-07-13 19:11:03,008 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-07-13 19:11:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:03,546 INFO L225 Difference]: With dead ends: 257593 [2021-07-13 19:11:03,546 INFO L226 Difference]: Without dead ends: 257593 [2021-07-13 19:11:04,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3538 GetRequests, 1848 SyntacticMatches, 0 SemanticMatches, 1690 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478939 ImplicationChecksByTransitivity, 147286.7ms TimeCoverageRelationStatistics Valid=583037, Invalid=2278135, Unknown=0, NotChecked=0, Total=2861172 [2021-07-13 19:11:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257593 states. [2021-07-13 19:11:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257593 to 12698. [2021-07-13 19:11:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12698 states, 12697 states have (on average 1.9968496495235095) internal successors, (25354), 12697 states have internal predecessors, (25354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12698 states to 12698 states and 25354 transitions. [2021-07-13 19:11:06,010 INFO L78 Accepts]: Start accepts. Automaton has 12698 states and 25354 transitions. Word has length 257 [2021-07-13 19:11:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:06,010 INFO L482 AbstractCegarLoop]: Abstraction has 12698 states and 25354 transitions. [2021-07-13 19:11:06,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 12698 states and 25354 transitions. [2021-07-13 19:11:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-07-13 19:11:06,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:06,027 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:06,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:06,245 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:11:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1276687758, now seen corresponding path program 24 times [2021-07-13 19:11:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:06,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149383195] [2021-07-13 19:11:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:07,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149383195] [2021-07-13 19:11:07,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149383195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064467586] [2021-07-13 19:11:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:07,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-07-13 19:11:07,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:11:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-07-13 19:11:08,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064467586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:08,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:08,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 29] total 79 [2021-07-13 19:11:08,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242630817] [2021-07-13 19:11:08,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-07-13 19:11:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-07-13 19:11:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5186, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 19:11:08,444 INFO L87 Difference]: Start difference. First operand 12698 states and 25354 transitions. Second operand has 79 states, 79 states have (on average 5.2784810126582276) internal successors, (417), 79 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 19:11:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 687 states. [2021-07-13 19:11:45,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:11:45,926 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:11:45,928 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:11:45,930 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:11:45,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:11:45 BasicIcfg [2021-07-13 19:11:45,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:11:45,930 INFO L168 Benchmark]: Toolchain (without parser) took 847620.42 ms. Allocated memory was 202.4 MB in the beginning and 7.9 GB in the end (delta: 7.7 GB). Free memory was 164.8 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.0 GB. Max. memory is 8.0 GB. [2021-07-13 19:11:45,930 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 202.4 MB. Free memory is still 183.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:11:45,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.33 ms. Allocated memory is still 202.4 MB. Free memory was 164.6 MB in the beginning and 158.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:11:45,931 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.29 ms. Allocated memory is still 202.4 MB. Free memory was 158.5 MB in the beginning and 155.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:11:45,931 INFO L168 Benchmark]: Boogie Preprocessor took 15.27 ms. Allocated memory is still 202.4 MB. Free memory was 155.9 MB in the beginning and 154.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:11:45,931 INFO L168 Benchmark]: RCFGBuilder took 304.42 ms. Allocated memory is still 202.4 MB. Free memory was 154.3 MB in the beginning and 127.1 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-07-13 19:11:45,931 INFO L168 Benchmark]: TraceAbstraction took 846717.70 ms. Allocated memory was 202.4 MB in the beginning and 7.9 GB in the end (delta: 7.7 GB). Free memory was 126.5 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 2.9 GB. Max. memory is 8.0 GB. [2021-07-13 19:11:45,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 202.4 MB. Free memory is still 183.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 549.33 ms. Allocated memory is still 202.4 MB. Free memory was 164.6 MB in the beginning and 158.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.29 ms. Allocated memory is still 202.4 MB. Free memory was 158.5 MB in the beginning and 155.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.27 ms. Allocated memory is still 202.4 MB. Free memory was 155.9 MB in the beginning and 154.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.42 ms. Allocated memory is still 202.4 MB. Free memory was 154.3 MB in the beginning and 127.1 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 846717.70 ms. Allocated memory was 202.4 MB in the beginning and 7.9 GB in the end (delta: 7.7 GB). Free memory was 126.5 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 2.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (12698states) and FLOYD_HOARE automaton (currently 687 states, 79 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 750 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 104 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 846633.5ms, OverallIterations: 27, TraceHistogramMax: 20, EmptinessCheckTime: 224.7ms, AutomataDifference: 812441.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2870 SDtfs, 233562 SDslu, 32642 SDs, 0 SdLazy, 7664 SolverSat, 38128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15688.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25589 GetRequests, 14341 SyntacticMatches, 0 SemanticMatches, 11247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6521357 ImplicationChecksByTransitivity, 721010.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12698occurred in iteration=26, InterpolantAutomatonStates: 10214, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6061.6ms AutomataMinimizationTime, 26 MinimizatonAttempts, 610985 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 649.0ms SsaConstructionTime, 1581.9ms SatisfiabilityAnalysisTime, 16886.4ms InterpolantComputationTime, 8350 NumberOfCodeBlocks, 8245 NumberOfCodeBlocksAsserted, 186 NumberOfCheckSat, 8298 ConstructedInterpolants, 0 QuantifiedInterpolants, 14728 SizeOfPredicates, 396 NumberOfNonLiveVariables, 8505 ConjunctsInSsa, 446 ConjunctsInUnsatCore, 52 InterpolantComputations, 3 PerfectInterpolantSequences, 10544/28694 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 could not prove your program: Timeout Completed graceful shutdown