/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:57:34,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:57:34,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:57:34,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 18:57:34,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:57:34,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:57:34,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:57:34,863 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 18:57:34,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:57:34,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:57:34,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:57:34,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:57:34,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:57:34,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:57:34,899 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:57:34,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:57:34,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:57:34,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:57:34,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:57:34,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:57:34,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:57:34,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:57:34,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:57:34,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:57:34,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:57:34,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:57:34,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:57:35,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:57:35,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:57:35,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:57:35,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:57:35,163 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:57:35,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-07-13 18:57:35,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c21546a5/9a158592479848a1b0b2054dc5d5e0ab/FLAGbf2ff63f2 [2021-07-13 18:57:35,664 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:57:35,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-07-13 18:57:35,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c21546a5/9a158592479848a1b0b2054dc5d5e0ab/FLAGbf2ff63f2 [2021-07-13 18:57:35,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c21546a5/9a158592479848a1b0b2054dc5d5e0ab [2021-07-13 18:57:35,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:57:35,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:57:35,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:57:35,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:57:35,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:57:35,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:57:35" (1/1) ... [2021-07-13 18:57:35,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c23dac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:35, skipping insertion in model container [2021-07-13 18:57:35,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:57:35" (1/1) ... [2021-07-13 18:57:35,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:57:36,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:57:36,127 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-1.i[820,833] [2021-07-13 18:57:36,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:57:36,343 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:57:36,350 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-1.i[820,833] [2021-07-13 18:57:36,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:57:36,414 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:57:36,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36 WrapperNode [2021-07-13 18:57:36,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:57:36,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:57:36,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:57:36,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:57:36,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:57:36,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:57:36,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:57:36,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:57:36,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (1/1) ... [2021-07-13 18:57:36,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:57:36,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:57:36,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:57:36,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:57:36,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (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 18:57:36,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:57:36,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:57:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 18:57:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:57:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-13 18:57:36,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-07-13 18:57:36,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-07-13 18:57:36,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:57:36,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:57:36,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:57:36,527 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 18:57:36,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:57:36,815 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-13 18:57:36,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:57:36 BoogieIcfgContainer [2021-07-13 18:57:36,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:57:36,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:57:36,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:57:36,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:57:36,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:57:35" (1/3) ... [2021-07-13 18:57:36,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e03290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:57:36, skipping insertion in model container [2021-07-13 18:57:36,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:57:36" (2/3) ... [2021-07-13 18:57:36,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e03290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:57:36, skipping insertion in model container [2021-07-13 18:57:36,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:57:36" (3/3) ... [2021-07-13 18:57:36,822 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-07-13 18:57:36,825 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:57:36,825 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:57:36,826 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 18:57:36,826 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,845 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,846 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,847 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,848 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,849 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,851 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,852 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:57:36,861 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-07-13 18:57:36,884 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 18:57:36,896 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:57:36,896 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:57:36,896 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:57:36,896 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:57:36,897 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:57:36,897 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:57:36,897 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:57:36,897 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:57:36,903 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 90 transitions, 188 flow [2021-07-13 18:57:36,927 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 347 states have (on average 2.0403458213256482) internal successors, (708), 347 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 18:57:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 347 states have (on average 2.0403458213256482) internal successors, (708), 347 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 18:57:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 18:57:36,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:36,939 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] [2021-07-13 18:57:36,939 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:36,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1593361763, now seen corresponding path program 1 times [2021-07-13 18:57:36,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:36,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446298970] [2021-07-13 18:57:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:37,124 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 18:57:37,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:37,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446298970] [2021-07-13 18:57:37,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446298970] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:37,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:57:37,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 18:57:37,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816614503] [2021-07-13 18:57:37,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-13 18:57:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:37,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-13 18:57:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 18:57:37,142 INFO L87 Difference]: Start difference. First operand has 348 states, 347 states have (on average 2.0403458213256482) internal successors, (708), 347 states have internal predecessors, (708), 0 states have call successors, (0), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:37,169 INFO L93 Difference]: Finished difference Result 346 states and 652 transitions. [2021-07-13 18:57:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-13 18:57:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 18:57:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:37,186 INFO L225 Difference]: With dead ends: 346 [2021-07-13 18:57:37,186 INFO L226 Difference]: Without dead ends: 292 [2021-07-13 18:57:37,188 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 18:57:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-13 18:57:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-07-13 18:57:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.8694158075601375) internal successors, (544), 291 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 18:57:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 544 transitions. [2021-07-13 18:57:37,243 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 544 transitions. Word has length 53 [2021-07-13 18:57:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:37,244 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 544 transitions. [2021-07-13 18:57:37,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 544 transitions. [2021-07-13 18:57:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 18:57:37,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:37,249 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] [2021-07-13 18:57:37,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:57:37,249 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash -436565571, now seen corresponding path program 1 times [2021-07-13 18:57:37,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:37,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497483416] [2021-07-13 18:57:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:37,302 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 18:57:37,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:37,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497483416] [2021-07-13 18:57:37,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497483416] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:37,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:57:37,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:57:37,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261439655] [2021-07-13 18:57:37,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:57:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:57:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:57:37,306 INFO L87 Difference]: Start difference. First operand 292 states and 544 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:37,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:37,320 INFO L93 Difference]: Finished difference Result 432 states and 824 transitions. [2021-07-13 18:57:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:57:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 18:57:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:37,325 INFO L225 Difference]: With dead ends: 432 [2021-07-13 18:57:37,325 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 18:57:37,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:57:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 18:57:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 306. [2021-07-13 18:57:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.8754098360655738) internal successors, (572), 305 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 18:57:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 572 transitions. [2021-07-13 18:57:37,333 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 572 transitions. Word has length 53 [2021-07-13 18:57:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:37,333 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 572 transitions. [2021-07-13 18:57:37,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 572 transitions. [2021-07-13 18:57:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-13 18:57:37,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:37,335 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] [2021-07-13 18:57:37,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:57:37,336 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1947629737, now seen corresponding path program 1 times [2021-07-13 18:57:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:37,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325499770] [2021-07-13 18:57:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:37,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:37,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325499770] [2021-07-13 18:57:37,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325499770] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:37,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:57:37,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:57:37,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050719268] [2021-07-13 18:57:37,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:57:37,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:57:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:57:37,401 INFO L87 Difference]: Start difference. First operand 306 states and 572 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:37,423 INFO L93 Difference]: Finished difference Result 439 states and 838 transitions. [2021-07-13 18:57:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:57:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-07-13 18:57:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:37,425 INFO L225 Difference]: With dead ends: 439 [2021-07-13 18:57:37,425 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 18:57:37,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:57:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 18:57:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 325. [2021-07-13 18:57:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.882716049382716) internal successors, (610), 324 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 18:57:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 610 transitions. [2021-07-13 18:57:37,435 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 610 transitions. Word has length 64 [2021-07-13 18:57:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:37,436 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 610 transitions. [2021-07-13 18:57:37,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 610 transitions. [2021-07-13 18:57:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-13 18:57:37,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:37,439 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] [2021-07-13 18:57:37,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:57:37,439 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 673821708, now seen corresponding path program 1 times [2021-07-13 18:57:37,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:37,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531510750] [2021-07-13 18:57:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:37,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531510750] [2021-07-13 18:57:37,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531510750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757753405] [2021-07-13 18:57:37,539 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 18:57:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-07-13 18:57:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:37,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 18:57:37,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 18:57:37,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 18:57:37,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 18:57:37,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-07-13 18:57:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757753405] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:57:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 18:57:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-07-13 18:57:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947367314] [2021-07-13 18:57:37,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:57:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:37,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:57:37,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:57:37,876 INFO L87 Difference]: Start difference. First operand 325 states and 610 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 18:57:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:37,896 INFO L93 Difference]: Finished difference Result 307 states and 565 transitions. [2021-07-13 18:57:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:57:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-07-13 18:57:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:37,901 INFO L225 Difference]: With dead ends: 307 [2021-07-13 18:57:37,901 INFO L226 Difference]: Without dead ends: 307 [2021-07-13 18:57:37,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:57:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-13 18:57:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-07-13 18:57:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.84640522875817) internal successors, (565), 306 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 18:57:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 565 transitions. [2021-07-13 18:57:37,911 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 565 transitions. Word has length 72 [2021-07-13 18:57:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:37,912 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 565 transitions. [2021-07-13 18:57:37,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 18:57:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 565 transitions. [2021-07-13 18:57:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-13 18:57:37,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:37,913 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] [2021-07-13 18:57:38,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:38,125 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1055514508, now seen corresponding path program 2 times [2021-07-13 18:57:38,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:38,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084367550] [2021-07-13 18:57:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:38,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:38,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084367550] [2021-07-13 18:57:38,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084367550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:38,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840815265] [2021-07-13 18:57:38,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:38,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:57:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 18:57:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:57:38,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840815265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:38,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:38,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 18:57:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561464626] [2021-07-13 18:57:38,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:57:38,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:57:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:57:38,348 INFO L87 Difference]: Start difference. First operand 307 states and 565 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 18:57:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:38,630 INFO L93 Difference]: Finished difference Result 1009 states and 1897 transitions. [2021-07-13 18:57:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:57:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 72 [2021-07-13 18:57:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:38,635 INFO L225 Difference]: With dead ends: 1009 [2021-07-13 18:57:38,635 INFO L226 Difference]: Without dead ends: 1009 [2021-07-13 18:57:38,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:57:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-13 18:57:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 658. [2021-07-13 18:57:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.887366818873668) internal successors, (1240), 657 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 18:57:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1240 transitions. [2021-07-13 18:57:38,651 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1240 transitions. Word has length 72 [2021-07-13 18:57:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:38,652 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 1240 transitions. [2021-07-13 18:57:38,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 18:57:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1240 transitions. [2021-07-13 18:57:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-07-13 18:57:38,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:38,654 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:38,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:38,869 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash 881659993, now seen corresponding path program 3 times [2021-07-13 18:57:38,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:38,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119105720] [2021-07-13 18:57:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 18:57:38,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:38,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119105720] [2021-07-13 18:57:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119105720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45374932] [2021-07-13 18:57:38,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:39,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:57:39,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:57:39,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 18:57:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45374932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:39,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:39,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 18:57:39,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957720282] [2021-07-13 18:57:39,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 18:57:39,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 18:57:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:57:39,184 INFO L87 Difference]: Start difference. First operand 658 states and 1240 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:57:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:39,227 INFO L93 Difference]: Finished difference Result 1046 states and 1980 transitions. [2021-07-13 18:57:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 18:57:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 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 91 [2021-07-13 18:57:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:39,231 INFO L225 Difference]: With dead ends: 1046 [2021-07-13 18:57:39,231 INFO L226 Difference]: Without dead ends: 1046 [2021-07-13 18:57:39,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:57:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-07-13 18:57:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 875. [2021-07-13 18:57:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.894736842105263) internal successors, (1656), 874 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states 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 18:57:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1656 transitions. [2021-07-13 18:57:39,244 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1656 transitions. Word has length 91 [2021-07-13 18:57:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:39,245 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1656 transitions. [2021-07-13 18:57:39,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 18:57:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1656 transitions. [2021-07-13 18:57:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-07-13 18:57:39,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:39,246 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-07-13 18:57:39,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:39,461 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash -911400325, now seen corresponding path program 4 times [2021-07-13 18:57:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:39,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306750102] [2021-07-13 18:57:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:57:39,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306750102] [2021-07-13 18:57:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306750102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265768020] [2021-07-13 18:57:39,536 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 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 18:57:39,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:57:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:39,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:57:39,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:57:39,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265768020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:39,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:39,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 18:57:39,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902674758] [2021-07-13 18:57:39,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 18:57:39,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 18:57:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:57:39,788 INFO L87 Difference]: Start difference. First operand 875 states and 1656 transitions. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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 18:57:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:39,831 INFO L93 Difference]: Finished difference Result 1341 states and 2534 transitions. [2021-07-13 18:57:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 18:57:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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 102 [2021-07-13 18:57:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:39,835 INFO L225 Difference]: With dead ends: 1341 [2021-07-13 18:57:39,835 INFO L226 Difference]: Without dead ends: 1341 [2021-07-13 18:57:39,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:57:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-13 18:57:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1149. [2021-07-13 18:57:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.896341463414634) internal successors, (2177), 1148 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states 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 18:57:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2177 transitions. [2021-07-13 18:57:39,853 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2177 transitions. Word has length 102 [2021-07-13 18:57:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:39,853 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 2177 transitions. [2021-07-13 18:57:39,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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 18:57:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2177 transitions. [2021-07-13 18:57:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-13 18:57:39,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:39,855 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:40,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:40,075 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1460877338, now seen corresponding path program 5 times [2021-07-13 18:57:40,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:40,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589207043] [2021-07-13 18:57:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:57:40,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589207043] [2021-07-13 18:57:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589207043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949617491] [2021-07-13 18:57:40,139 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 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 18:57:40,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 18:57:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:57:40,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:57:40,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949617491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:40,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:40,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 18:57:40,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953979123] [2021-07-13 18:57:40,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:57:40,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:57:40,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:57:40,443 INFO L87 Difference]: Start difference. First operand 1149 states and 2177 transitions. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 18:57:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:40,510 INFO L93 Difference]: Finished difference Result 1615 states and 3055 transitions. [2021-07-13 18:57:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:57:40,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 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 18:57:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:40,516 INFO L225 Difference]: With dead ends: 1615 [2021-07-13 18:57:40,516 INFO L226 Difference]: Without dead ends: 1615 [2021-07-13 18:57:40,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:57:40,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-07-13 18:57:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1423. [2021-07-13 18:57:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 1.8973277074542898) internal successors, (2698), 1422 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states 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 18:57:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 2698 transitions. [2021-07-13 18:57:40,537 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 2698 transitions. Word has length 110 [2021-07-13 18:57:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:40,538 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 2698 transitions. [2021-07-13 18:57:40,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 18:57:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 2698 transitions. [2021-07-13 18:57:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-07-13 18:57:40,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:40,540 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-07-13 18:57:40,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:40,762 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash -313404847, now seen corresponding path program 6 times [2021-07-13 18:57:40,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:40,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878730793] [2021-07-13 18:57:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:57:40,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878730793] [2021-07-13 18:57:40,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878730793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963182612] [2021-07-13 18:57:40,849 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 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 18:57:40,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:57:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:57:40,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-13 18:57:41,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963182612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:41,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:41,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 18:57:41,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965308144] [2021-07-13 18:57:41,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:57:41,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:57:41,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:57:41,200 INFO L87 Difference]: Start difference. First operand 1423 states and 2698 transitions. Second operand has 18 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 18:57:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:43,693 INFO L93 Difference]: Finished difference Result 2733 states and 5156 transitions. [2021-07-13 18:57:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-07-13 18:57:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 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 118 [2021-07-13 18:57:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:43,701 INFO L225 Difference]: With dead ends: 2733 [2021-07-13 18:57:43,701 INFO L226 Difference]: Without dead ends: 2733 [2021-07-13 18:57:43,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11215 ImplicationChecksByTransitivity, 2173.1ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-07-13 18:57:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-07-13 18:57:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2124. [2021-07-13 18:57:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.8973151201130476) internal successors, (4028), 2123 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states 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 18:57:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 4028 transitions. [2021-07-13 18:57:43,738 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 4028 transitions. Word has length 118 [2021-07-13 18:57:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:43,738 INFO L482 AbstractCegarLoop]: Abstraction has 2124 states and 4028 transitions. [2021-07-13 18:57:43,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 18:57:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 4028 transitions. [2021-07-13 18:57:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-07-13 18:57:43,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:43,742 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:43,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:43,951 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 44909880, now seen corresponding path program 7 times [2021-07-13 18:57:43,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:43,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549122829] [2021-07-13 18:57:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-13 18:57:44,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:44,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549122829] [2021-07-13 18:57:44,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549122829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:44,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048698931] [2021-07-13 18:57:44,049 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 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 18:57:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:57:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-13 18:57:44,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048698931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:44,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:44,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:57:44,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120546882] [2021-07-13 18:57:44,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:57:44,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:57:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:57:44,325 INFO L87 Difference]: Start difference. First operand 2124 states and 4028 transitions. Second operand has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 18:57:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:44,436 INFO L93 Difference]: Finished difference Result 2708 states and 5124 transitions. [2021-07-13 18:57:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:57:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 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 137 [2021-07-13 18:57:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:44,444 INFO L225 Difference]: With dead ends: 2708 [2021-07-13 18:57:44,444 INFO L226 Difference]: Without dead ends: 2708 [2021-07-13 18:57:44,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:57:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-07-13 18:57:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2468. [2021-07-13 18:57:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.8970409404134576) internal successors, (4680), 2467 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 18:57:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4680 transitions. [2021-07-13 18:57:44,491 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4680 transitions. Word has length 137 [2021-07-13 18:57:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:44,491 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 4680 transitions. [2021-07-13 18:57:44,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 18:57:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4680 transitions. [2021-07-13 18:57:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-07-13 18:57:44,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:44,497 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:44,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 18:57:44,715 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash -120582163, now seen corresponding path program 8 times [2021-07-13 18:57:44,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:44,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197884851] [2021-07-13 18:57:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-13 18:57:44,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:44,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197884851] [2021-07-13 18:57:44,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197884851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:44,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154060996] [2021-07-13 18:57:44,819 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 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 18:57:44,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:57:44,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:57:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-13 18:57:45,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154060996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:45,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:45,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:57:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313036069] [2021-07-13 18:57:45,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:57:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:57:45,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:57:45,120 INFO L87 Difference]: Start difference. First operand 2468 states and 4680 transitions. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 18:57:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:45,261 INFO L93 Difference]: Finished difference Result 3052 states and 5776 transitions. [2021-07-13 18:57:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:57:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-07-13 18:57:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:45,269 INFO L225 Difference]: With dead ends: 3052 [2021-07-13 18:57:45,270 INFO L226 Difference]: Without dead ends: 3052 [2021-07-13 18:57:45,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:57:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-07-13 18:57:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2812. [2021-07-13 18:57:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 1.896833866951263) internal successors, (5332), 2811 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states 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 18:57:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 5332 transitions. [2021-07-13 18:57:45,312 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 5332 transitions. Word has length 145 [2021-07-13 18:57:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:45,313 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 5332 transitions. [2021-07-13 18:57:45,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 18:57:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 5332 transitions. [2021-07-13 18:57:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-07-13 18:57:45,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:45,318 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:45,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 18:57:45,538 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:45,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:45,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2132060766, now seen corresponding path program 9 times [2021-07-13 18:57:45,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:45,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887450667] [2021-07-13 18:57:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 175 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-13 18:57:45,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:45,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887450667] [2021-07-13 18:57:45,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887450667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:45,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290418559] [2021-07-13 18:57:45,663 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 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 18:57:45,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 18:57:45,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:57:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-07-13 18:57:46,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290418559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:46,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:46,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2021-07-13 18:57:46,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351890964] [2021-07-13 18:57:46,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 18:57:46,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:46,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 18:57:46,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:57:46,010 INFO L87 Difference]: Start difference. First operand 2812 states and 5332 transitions. Second operand has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:53,760 INFO L93 Difference]: Finished difference Result 4612 states and 8698 transitions. [2021-07-13 18:57:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2021-07-13 18:57:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-07-13 18:57:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:53,772 INFO L225 Difference]: With dead ends: 4612 [2021-07-13 18:57:53,772 INFO L226 Difference]: Without dead ends: 4612 [2021-07-13 18:57:53,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51908 ImplicationChecksByTransitivity, 7160.8ms TimeCoverageRelationStatistics Valid=21496, Invalid=89726, Unknown=0, NotChecked=0, Total=111222 [2021-07-13 18:57:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-07-13 18:57:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 3793. [2021-07-13 18:57:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 1.895042194092827) internal successors, (7186), 3792 states have internal predecessors, (7186), 0 states have call successors, (0), 0 states 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 18:57:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 7186 transitions. [2021-07-13 18:57:53,842 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 7186 transitions. Word has length 153 [2021-07-13 18:57:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:53,843 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 7186 transitions. [2021-07-13 18:57:53,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:57:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 7186 transitions. [2021-07-13 18:57:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-07-13 18:57:53,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:53,849 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:54,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:54,065 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1107497405, now seen corresponding path program 10 times [2021-07-13 18:57:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:54,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846763645] [2021-07-13 18:57:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-13 18:57:54,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846763645] [2021-07-13 18:57:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846763645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418155781] [2021-07-13 18:57:54,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:57:54,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:57:54,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:54,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:57:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-13 18:57:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418155781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:54,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:54,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:57:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888223530] [2021-07-13 18:57:54,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:57:54,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:57:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:57:54,553 INFO L87 Difference]: Start difference. First operand 3793 states and 7186 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 18:57:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:54,772 INFO L93 Difference]: Finished difference Result 4495 states and 8500 transitions. [2021-07-13 18:57:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:57:54,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 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 172 [2021-07-13 18:57:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:54,785 INFO L225 Difference]: With dead ends: 4495 [2021-07-13 18:57:54,785 INFO L226 Difference]: Without dead ends: 4495 [2021-07-13 18:57:54,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:57:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-07-13 18:57:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4207. [2021-07-13 18:57:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 1.8946742748454588) internal successors, (7969), 4206 states have internal predecessors, (7969), 0 states have call successors, (0), 0 states 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 18:57:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 7969 transitions. [2021-07-13 18:57:54,843 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 7969 transitions. Word has length 172 [2021-07-13 18:57:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:54,843 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 7969 transitions. [2021-07-13 18:57:54,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 18:57:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 7969 transitions. [2021-07-13 18:57:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-07-13 18:57:54,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:54,851 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:55,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:55,067 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash 466543336, now seen corresponding path program 11 times [2021-07-13 18:57:55,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:55,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983561848] [2021-07-13 18:57:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-13 18:57:55,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:55,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983561848] [2021-07-13 18:57:55,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983561848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:55,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981347780] [2021-07-13 18:57:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:55,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:57:55,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:57:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-13 18:57:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981347780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:55,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:55,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 18:57:55,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669343670] [2021-07-13 18:57:55,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:57:55,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:57:55,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:57:55,534 INFO L87 Difference]: Start difference. First operand 4207 states and 7969 transitions. Second operand has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 18:57:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:57:55,821 INFO L93 Difference]: Finished difference Result 4909 states and 9283 transitions. [2021-07-13 18:57:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:57:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-07-13 18:57:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:57:55,835 INFO L225 Difference]: With dead ends: 4909 [2021-07-13 18:57:55,835 INFO L226 Difference]: Without dead ends: 4909 [2021-07-13 18:57:55,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:57:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2021-07-13 18:57:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 4621. [2021-07-13 18:57:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 1.8943722943722943) internal successors, (8752), 4620 states have internal predecessors, (8752), 0 states have call successors, (0), 0 states 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 18:57:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 8752 transitions. [2021-07-13 18:57:55,899 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 8752 transitions. Word has length 180 [2021-07-13 18:57:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:57:55,899 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 8752 transitions. [2021-07-13 18:57:55,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 18:57:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 8752 transitions. [2021-07-13 18:57:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-07-13 18:57:55,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:57:55,907 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:57:56,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 18:57:56,126 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:57:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:57:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1061660397, now seen corresponding path program 12 times [2021-07-13 18:57:56,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:57:56,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605918672] [2021-07-13 18:57:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:57:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:57:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 49 proven. 370 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-13 18:57:56,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:57:56,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605918672] [2021-07-13 18:57:56,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605918672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:56,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436377105] [2021-07-13 18:57:56,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:57:56,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 18:57:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:57:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:57:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:57:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-07-13 18:57:56,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436377105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:57:56,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:57:56,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-07-13 18:57:56,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992331892] [2021-07-13 18:57:56,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 18:57:56,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:57:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 18:57:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:57:56,830 INFO L87 Difference]: Start difference. First operand 4621 states and 8752 transitions. Second operand has 34 states, 34 states have (on average 6.705882352941177) internal successors, (228), 34 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 18:58:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:15,845 INFO L93 Difference]: Finished difference Result 6911 states and 13026 transitions. [2021-07-13 18:58:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-07-13 18:58:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.705882352941177) internal successors, (228), 34 states have internal predecessors, (228), 0 states have call successors, (0), 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 188 [2021-07-13 18:58:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:15,855 INFO L225 Difference]: With dead ends: 6911 [2021-07-13 18:58:15,855 INFO L226 Difference]: Without dead ends: 6911 [2021-07-13 18:58:15,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151834 ImplicationChecksByTransitivity, 17783.5ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-07-13 18:58:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2021-07-13 18:58:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 5882. [2021-07-13 18:58:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5882 states, 5881 states have (on average 1.8925352831151165) internal successors, (11130), 5881 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states 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 18:58:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 11130 transitions. [2021-07-13 18:58:15,982 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 11130 transitions. Word has length 188 [2021-07-13 18:58:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:15,982 INFO L482 AbstractCegarLoop]: Abstraction has 5882 states and 11130 transitions. [2021-07-13 18:58:15,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.705882352941177) internal successors, (228), 34 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 18:58:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 11130 transitions. [2021-07-13 18:58:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-07-13 18:58:15,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:15,991 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:16,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 18:58:16,208 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1951609482, now seen corresponding path program 13 times [2021-07-13 18:58:16,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:16,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380659414] [2021-07-13 18:58:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-13 18:58:16,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:16,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380659414] [2021-07-13 18:58:16,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380659414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:16,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712635457] [2021-07-13 18:58:16,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:58:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-13 18:58:16,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712635457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:16,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:16,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-13 18:58:16,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808093610] [2021-07-13 18:58:16,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 18:58:16,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 18:58:16,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:58:16,759 INFO L87 Difference]: Start difference. First operand 5882 states and 11130 transitions. Second operand has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 18:58:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:17,100 INFO L93 Difference]: Finished difference Result 6702 states and 12662 transitions. [2021-07-13 18:58:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:58:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 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 207 [2021-07-13 18:58:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:17,109 INFO L225 Difference]: With dead ends: 6702 [2021-07-13 18:58:17,109 INFO L226 Difference]: Without dead ends: 6702 [2021-07-13 18:58:17,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:58:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2021-07-13 18:58:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 6366. [2021-07-13 18:58:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 1.8922230950510606) internal successors, (12044), 6365 states have internal predecessors, (12044), 0 states have call successors, (0), 0 states 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 18:58:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 12044 transitions. [2021-07-13 18:58:17,180 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 12044 transitions. Word has length 207 [2021-07-13 18:58:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:17,181 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 12044 transitions. [2021-07-13 18:58:17,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 18:58:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 12044 transitions. [2021-07-13 18:58:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-07-13 18:58:17,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:17,191 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:17,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 18:58:17,405 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash -375008149, now seen corresponding path program 14 times [2021-07-13 18:58:17,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:17,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447767763] [2021-07-13 18:58:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-13 18:58:17,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:17,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447767763] [2021-07-13 18:58:17,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447767763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:17,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726545240] [2021-07-13 18:58:17,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:17,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:58:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:58:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:58:17,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-13 18:58:18,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726545240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:18,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:18,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-13 18:58:18,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562999003] [2021-07-13 18:58:18,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 18:58:18,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:18,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 18:58:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:58:18,093 INFO L87 Difference]: Start difference. First operand 6366 states and 12044 transitions. Second operand has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 18:58:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:18,522 INFO L93 Difference]: Finished difference Result 7186 states and 13576 transitions. [2021-07-13 18:58:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 18:58:18,522 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-07-13 18:58:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:18,574 INFO L225 Difference]: With dead ends: 7186 [2021-07-13 18:58:18,575 INFO L226 Difference]: Without dead ends: 7186 [2021-07-13 18:58:18,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 18:58:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-07-13 18:58:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6850. [2021-07-13 18:58:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6850 states, 6849 states have (on average 1.8919550299313768) internal successors, (12958), 6849 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states 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 18:58:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 12958 transitions. [2021-07-13 18:58:18,654 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 12958 transitions. Word has length 215 [2021-07-13 18:58:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:58:18,654 INFO L482 AbstractCegarLoop]: Abstraction has 6850 states and 12958 transitions. [2021-07-13 18:58:18,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 18:58:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 12958 transitions. [2021-07-13 18:58:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-07-13 18:58:18,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:58:18,664 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:58:18,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:18,879 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:58:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:58:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1095297440, now seen corresponding path program 15 times [2021-07-13 18:58:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:58:18,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207397142] [2021-07-13 18:58:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:58:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:58:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 61 proven. 637 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-13 18:58:19,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:58:19,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207397142] [2021-07-13 18:58:19,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207397142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:19,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490162061] [2021-07-13 18:58:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:58:19,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:58:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:58:19,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:58:19,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:58:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-07-13 18:58:19,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490162061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:58:19,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:58:19,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15] total 42 [2021-07-13 18:58:19,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765615620] [2021-07-13 18:58:19,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 18:58:19,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:58:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 18:58:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:58:19,668 INFO L87 Difference]: Start difference. First operand 6850 states and 12958 transitions. Second operand has 42 states, 42 states have (on average 6.261904761904762) internal successors, (263), 42 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 18:58:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:58:59,892 INFO L93 Difference]: Finished difference Result 9630 states and 18140 transitions. [2021-07-13 18:58:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 821 states. [2021-07-13 18:58:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.261904761904762) internal successors, (263), 42 states have internal predecessors, (263), 0 states have call successors, (0), 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 223 [2021-07-13 18:58:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:58:59,902 INFO L225 Difference]: With dead ends: 9630 [2021-07-13 18:58:59,902 INFO L226 Difference]: Without dead ends: 9630 [2021-07-13 18:58:59,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 838 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349585 ImplicationChecksByTransitivity, 37737.2ms TimeCoverageRelationStatistics Valid=125901, Invalid=578859, Unknown=0, NotChecked=0, Total=704760 [2021-07-13 18:58:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2021-07-13 18:59:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 8391. [2021-07-13 18:59:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 1.8903456495828368) internal successors, (15860), 8390 states have internal predecessors, (15860), 0 states have call successors, (0), 0 states 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 18:59:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 15860 transitions. [2021-07-13 18:59:00,027 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 15860 transitions. Word has length 223 [2021-07-13 18:59:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:59:00,027 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 15860 transitions. [2021-07-13 18:59:00,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 6.261904761904762) internal successors, (263), 42 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 18:59:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 15860 transitions. [2021-07-13 18:59:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-07-13 18:59:00,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:59:00,038 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:59:00,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 18:59:00,253 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:59:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:59:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1919014401, now seen corresponding path program 16 times [2021-07-13 18:59:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:59:00,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976653829] [2021-07-13 18:59:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:59:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:59:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-13 18:59:00,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:59:00,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976653829] [2021-07-13 18:59:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976653829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:00,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251782615] [2021-07-13 18:59:00,654 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 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 18:59:00,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:59:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:59:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 18:59:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:59:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-13 18:59:01,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251782615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:01,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:59:01,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-07-13 18:59:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770149676] [2021-07-13 18:59:01,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 18:59:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:59:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 18:59:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:59:01,067 INFO L87 Difference]: Start difference. First operand 8391 states and 15860 transitions. Second operand has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 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 18:59:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:59:01,612 INFO L93 Difference]: Finished difference Result 9329 states and 17610 transitions. [2021-07-13 18:59:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 18:59:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 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 242 [2021-07-13 18:59:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:59:01,623 INFO L225 Difference]: With dead ends: 9329 [2021-07-13 18:59:01,623 INFO L226 Difference]: Without dead ends: 9329 [2021-07-13 18:59:01,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 702.7ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 18:59:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-07-13 18:59:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 8945. [2021-07-13 18:59:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8945 states, 8944 states have (on average 1.8900939177101967) internal successors, (16905), 8944 states have internal predecessors, (16905), 0 states have call successors, (0), 0 states 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 18:59:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 16905 transitions. [2021-07-13 18:59:01,731 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 16905 transitions. Word has length 242 [2021-07-13 18:59:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:59:01,731 INFO L482 AbstractCegarLoop]: Abstraction has 8945 states and 16905 transitions. [2021-07-13 18:59:01,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 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 18:59:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 16905 transitions. [2021-07-13 18:59:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-07-13 18:59:01,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:59:01,745 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:59:01,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:59:01,961 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:59:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:59:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1596434710, now seen corresponding path program 17 times [2021-07-13 18:59:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:59:01,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974868574] [2021-07-13 18:59:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:59:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:59:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-13 18:59:02,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:59:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974868574] [2021-07-13 18:59:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974868574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45857533] [2021-07-13 18:59:02,310 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 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 18:59:02,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 18:59:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:59:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 18:59:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:59:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-13 18:59:02,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45857533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:02,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:59:02,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-13 18:59:02,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218597098] [2021-07-13 18:59:02,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 18:59:02,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:59:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 18:59:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:59:02,781 INFO L87 Difference]: Start difference. First operand 8945 states and 16905 transitions. Second operand has 35 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 18:59:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:59:03,381 INFO L93 Difference]: Finished difference Result 9883 states and 18655 transitions. [2021-07-13 18:59:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 18:59:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 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 250 [2021-07-13 18:59:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:59:03,393 INFO L225 Difference]: With dead ends: 9883 [2021-07-13 18:59:03,394 INFO L226 Difference]: Without dead ends: 9883 [2021-07-13 18:59:03,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 696.1ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 18:59:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2021-07-13 18:59:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 9499. [2021-07-13 18:59:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 1.8898715519056644) internal successors, (17950), 9498 states have internal predecessors, (17950), 0 states have call successors, (0), 0 states 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 18:59:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 17950 transitions. [2021-07-13 18:59:03,505 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 17950 transitions. Word has length 250 [2021-07-13 18:59:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:59:03,505 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 17950 transitions. [2021-07-13 18:59:03,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 18:59:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 17950 transitions. [2021-07-13 18:59:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-07-13 18:59:03,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:59:03,516 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:59:03,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:59:03,729 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:59:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:59:03,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1208457003, now seen corresponding path program 18 times [2021-07-13 18:59:03,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:59:03,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982963143] [2021-07-13 18:59:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:59:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:59:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 73 proven. 976 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-13 18:59:04,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:59:04,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982963143] [2021-07-13 18:59:04,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982963143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806691670] [2021-07-13 18:59:04,108 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 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 18:59:04,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 18:59:04,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:59:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:59:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:59:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2021-07-13 18:59:04,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806691670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:59:04,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:59:04,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 50 [2021-07-13 18:59:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632946822] [2021-07-13 18:59:04,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 18:59:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:59:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 18:59:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 18:59:04,895 INFO L87 Difference]: Start difference. First operand 9499 states and 17950 transitions. Second operand has 50 states, 50 states have (on average 5.96) internal successors, (298), 50 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 19:00:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:00:22,294 INFO L93 Difference]: Finished difference Result 12769 states and 24040 transitions. [2021-07-13 19:00:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1151 states. [2021-07-13 19:00:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.96) internal successors, (298), 50 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-07-13 19:00:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:00:22,309 INFO L225 Difference]: With dead ends: 12769 [2021-07-13 19:00:22,309 INFO L226 Difference]: Without dead ends: 12769 [2021-07-13 19:00:22,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 1172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693207 ImplicationChecksByTransitivity, 72289.7ms TimeCoverageRelationStatistics Valid=240556, Invalid=1136546, Unknown=0, NotChecked=0, Total=1377102 [2021-07-13 19:00:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2021-07-13 19:00:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 11320. [2021-07-13 19:00:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11319 states have (on average 1.8885060517713579) internal successors, (21376), 11319 states have internal predecessors, (21376), 0 states have call successors, (0), 0 states 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 19:00:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 21376 transitions. [2021-07-13 19:00:22,508 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 21376 transitions. Word has length 258 [2021-07-13 19:00:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:00:22,508 INFO L482 AbstractCegarLoop]: Abstraction has 11320 states and 21376 transitions. [2021-07-13 19:00:22,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 5.96) internal successors, (298), 50 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 19:00:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 21376 transitions. [2021-07-13 19:00:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-07-13 19:00:22,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:00:22,522 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:00:22,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:00:22,725 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:00:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:00:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash 99810484, now seen corresponding path program 19 times [2021-07-13 19:00:22,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:00:22,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752858871] [2021-07-13 19:00:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:00:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:00:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-13 19:00:23,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:00:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752858871] [2021-07-13 19:00:23,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752858871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117155697] [2021-07-13 19:00:23,126 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 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 19:00:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:00:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:00:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:00:23,585 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 19:00:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-13 19:00:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117155697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:00:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-07-13 19:00:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006151168] [2021-07-13 19:00:23,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 19:00:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:00:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 19:00:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:00:23,715 INFO L87 Difference]: Start difference. First operand 11320 states and 21376 transitions. Second operand has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:00:24,504 INFO L93 Difference]: Finished difference Result 12376 states and 23344 transitions. [2021-07-13 19:00:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:00:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2021-07-13 19:00:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:00:24,518 INFO L225 Difference]: With dead ends: 12376 [2021-07-13 19:00:24,518 INFO L226 Difference]: Without dead ends: 12376 [2021-07-13 19:00:24,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:00:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2021-07-13 19:00:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 11944. [2021-07-13 19:00:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11944 states, 11943 states have (on average 1.8883027714979486) internal successors, (22552), 11943 states have internal predecessors, (22552), 0 states have call successors, (0), 0 states 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 19:00:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11944 states to 11944 states and 22552 transitions. [2021-07-13 19:00:24,655 INFO L78 Accepts]: Start accepts. Automaton has 11944 states and 22552 transitions. Word has length 277 [2021-07-13 19:00:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:00:24,655 INFO L482 AbstractCegarLoop]: Abstraction has 11944 states and 22552 transitions. [2021-07-13 19:00:24,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 11944 states and 22552 transitions. [2021-07-13 19:00:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-07-13 19:00:24,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:00:24,668 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:00:24,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:00:24,868 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:00:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:00:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1815220201, now seen corresponding path program 20 times [2021-07-13 19:00:24,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:00:24,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942758923] [2021-07-13 19:00:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:00:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:00:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-13 19:00:25,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:00:25,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942758923] [2021-07-13 19:00:25,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942758923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:25,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815499475] [2021-07-13 19:00:25,317 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 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 19:00:25,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:00:25,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:00:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 19:00:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:00:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-13 19:00:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815499475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:25,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:00:25,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-07-13 19:00:25,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454085636] [2021-07-13 19:00:25,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 19:00:25,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:00:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 19:00:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:00:25,769 INFO L87 Difference]: Start difference. First operand 11944 states and 22552 transitions. Second operand has 41 states, 41 states have (on average 5.780487804878049) internal successors, (237), 41 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:00:26,765 INFO L93 Difference]: Finished difference Result 13000 states and 24520 transitions. [2021-07-13 19:00:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:00:26,765 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.780487804878049) internal successors, (237), 41 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-07-13 19:00:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:00:26,779 INFO L225 Difference]: With dead ends: 13000 [2021-07-13 19:00:26,779 INFO L226 Difference]: Without dead ends: 13000 [2021-07-13 19:00:26,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 951.3ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 19:00:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13000 states. [2021-07-13 19:00:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13000 to 12568. [2021-07-13 19:00:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 12567 states have (on average 1.888119678523116) internal successors, (23728), 12567 states have internal predecessors, (23728), 0 states have call successors, (0), 0 states 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 19:00:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 23728 transitions. [2021-07-13 19:00:26,922 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 23728 transitions. Word has length 285 [2021-07-13 19:00:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:00:26,923 INFO L482 AbstractCegarLoop]: Abstraction has 12568 states and 23728 transitions. [2021-07-13 19:00:26,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.780487804878049) internal successors, (237), 41 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:00:26,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 23728 transitions. [2021-07-13 19:00:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-13 19:00:26,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:00:26,937 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:00:27,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:00:27,144 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:00:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:00:27,144 INFO L82 PathProgramCache]: Analyzing trace with hash -371646946, now seen corresponding path program 21 times [2021-07-13 19:00:27,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:00:27,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110221848] [2021-07-13 19:00:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:00:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:00:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 85 proven. 1387 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-13 19:00:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:00:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110221848] [2021-07-13 19:00:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110221848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502639435] [2021-07-13 19:00:27,629 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 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 19:00:27,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:00:27,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:00:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:00:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:00:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2021-07-13 19:00:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502639435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:00:28,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:00:28,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 19] total 58 [2021-07-13 19:00:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245486187] [2021-07-13 19:00:28,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-13 19:00:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:00:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-13 19:00:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:00:28,425 INFO L87 Difference]: Start difference. First operand 12568 states and 23728 transitions. Second operand has 58 states, 58 states have (on average 5.741379310344827) internal successors, (333), 58 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 19:02:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:45,765 INFO L93 Difference]: Finished difference Result 15812 states and 29784 transitions. [2021-07-13 19:02:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1535 states. [2021-07-13 19:02:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.741379310344827) internal successors, (333), 58 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-13 19:02:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:45,783 INFO L225 Difference]: With dead ends: 15812 [2021-07-13 19:02:45,783 INFO L226 Difference]: Without dead ends: 15812 [2021-07-13 19:02:45,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2413 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 1560 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240164 ImplicationChecksByTransitivity, 127402.3ms TimeCoverageRelationStatistics Valid=418764, Invalid=2019518, Unknown=0, NotChecked=0, Total=2438282 [2021-07-13 19:02:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15812 states. [2021-07-13 19:02:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15812 to 14669. [2021-07-13 19:02:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14669 states, 14668 states have (on average 1.8869648213798746) internal successors, (27678), 14668 states have internal predecessors, (27678), 0 states have call successors, (0), 0 states 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 19:02:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14669 states to 14669 states and 27678 transitions. [2021-07-13 19:02:46,062 INFO L78 Accepts]: Start accepts. Automaton has 14669 states and 27678 transitions. Word has length 293 [2021-07-13 19:02:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:46,062 INFO L482 AbstractCegarLoop]: Abstraction has 14669 states and 27678 transitions. [2021-07-13 19:02:46,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 5.741379310344827) internal successors, (333), 58 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 19:02:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14669 states and 27678 transitions. [2021-07-13 19:02:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-07-13 19:02:46,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:46,079 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:02:46,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:02:46,293 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 120507201, now seen corresponding path program 22 times [2021-07-13 19:02:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:46,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143728300] [2021-07-13 19:02:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:46,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:46,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143728300] [2021-07-13 19:02:46,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143728300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:46,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164984511] [2021-07-13 19:02:46,474 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 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 19:02:46,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:02:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:02:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:46,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164984511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:46,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:46,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 19:02:46,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296819455] [2021-07-13 19:02:46,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:02:46,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:02:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:02:46,991 INFO L87 Difference]: Start difference. First operand 14669 states and 27678 transitions. Second operand has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 19:02:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:47,256 INFO L93 Difference]: Finished difference Result 17289 states and 32558 transitions. [2021-07-13 19:02:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:02:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 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 312 [2021-07-13 19:02:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:47,277 INFO L225 Difference]: With dead ends: 17289 [2021-07-13 19:02:47,277 INFO L226 Difference]: Without dead ends: 17289 [2021-07-13 19:02:47,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:02:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-07-13 19:02:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 16146. [2021-07-13 19:02:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16146 states, 16145 states have (on average 1.8861567048621863) internal successors, (30452), 16145 states have internal predecessors, (30452), 0 states have call successors, (0), 0 states 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 19:02:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 30452 transitions. [2021-07-13 19:02:47,451 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 30452 transitions. Word has length 312 [2021-07-13 19:02:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:47,451 INFO L482 AbstractCegarLoop]: Abstraction has 16146 states and 30452 transitions. [2021-07-13 19:02:47,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 19:02:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 30452 transitions. [2021-07-13 19:02:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-07-13 19:02:47,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:47,469 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:02:47,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:47,686 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1013905773, now seen corresponding path program 23 times [2021-07-13 19:02:47,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:47,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100055187] [2021-07-13 19:02:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:48,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100055187] [2021-07-13 19:02:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100055187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231648170] [2021-07-13 19:02:48,055 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 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 19:02:48,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-13 19:02:48,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:02:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:48,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231648170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:48,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:48,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-13 19:02:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745754779] [2021-07-13 19:02:48,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:02:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:02:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:02:48,623 INFO L87 Difference]: Start difference. First operand 16146 states and 30452 transitions. Second operand has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:02:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:48,925 INFO L93 Difference]: Finished difference Result 18766 states and 35332 transitions. [2021-07-13 19:02:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:02:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-07-13 19:02:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:48,947 INFO L225 Difference]: With dead ends: 18766 [2021-07-13 19:02:48,948 INFO L226 Difference]: Without dead ends: 18766 [2021-07-13 19:02:48,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:02:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18766 states. [2021-07-13 19:02:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18766 to 17623. [2021-07-13 19:02:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17623 states, 17622 states have (on average 1.88548405402338) internal successors, (33226), 17622 states have internal predecessors, (33226), 0 states have call successors, (0), 0 states 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 19:02:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17623 states to 17623 states and 33226 transitions. [2021-07-13 19:02:49,127 INFO L78 Accepts]: Start accepts. Automaton has 17623 states and 33226 transitions. Word has length 323 [2021-07-13 19:02:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:49,127 INFO L482 AbstractCegarLoop]: Abstraction has 17623 states and 33226 transitions. [2021-07-13 19:02:49,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:02:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 17623 states and 33226 transitions. [2021-07-13 19:02:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-07-13 19:02:49,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:49,145 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:02:49,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:02:49,346 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1039328257, now seen corresponding path program 24 times [2021-07-13 19:02:49,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:49,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108613875] [2021-07-13 19:02:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:49,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:49,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108613875] [2021-07-13 19:02:49,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108613875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:49,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383722634] [2021-07-13 19:02:49,568 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 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 19:02:49,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-07-13 19:02:49,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:02:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383722634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:50,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:50,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-13 19:02:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997378288] [2021-07-13 19:02:50,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:02:50,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:50,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:02:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:02:50,234 INFO L87 Difference]: Start difference. First operand 17623 states and 33226 transitions. Second operand has 27 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 19:02:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:50,696 INFO L93 Difference]: Finished difference Result 20243 states and 38106 transitions. [2021-07-13 19:02:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:02:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 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 334 [2021-07-13 19:02:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:50,719 INFO L225 Difference]: With dead ends: 20243 [2021-07-13 19:02:50,719 INFO L226 Difference]: Without dead ends: 20243 [2021-07-13 19:02:50,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:02:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20243 states. [2021-07-13 19:02:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20243 to 19100. [2021-07-13 19:02:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19100 states, 19099 states have (on average 1.8849154405989843) internal successors, (36000), 19099 states have internal predecessors, (36000), 0 states have call successors, (0), 0 states 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 19:02:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19100 states to 19100 states and 36000 transitions. [2021-07-13 19:02:50,959 INFO L78 Accepts]: Start accepts. Automaton has 19100 states and 36000 transitions. Word has length 334 [2021-07-13 19:02:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:50,959 INFO L482 AbstractCegarLoop]: Abstraction has 19100 states and 36000 transitions. [2021-07-13 19:02:50,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 19:02:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 19100 states and 36000 transitions. [2021-07-13 19:02:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-07-13 19:02:50,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:50,980 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 12, 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] [2021-07-13 19:02:51,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:51,182 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:51,182 INFO L82 PathProgramCache]: Analyzing trace with hash -687213101, now seen corresponding path program 25 times [2021-07-13 19:02:51,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:51,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249679257] [2021-07-13 19:02:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:51,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249679257] [2021-07-13 19:02:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249679257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51175727] [2021-07-13 19:02:51,445 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 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 19:02:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:51,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:02:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:51,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51175727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:51,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:51,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-13 19:02:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878571805] [2021-07-13 19:02:51,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:02:51,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:02:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:02:51,931 INFO L87 Difference]: Start difference. First operand 19100 states and 36000 transitions. Second operand has 29 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 19:02:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:52,343 INFO L93 Difference]: Finished difference Result 21720 states and 40880 transitions. [2021-07-13 19:02:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:02:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 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 345 [2021-07-13 19:02:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:52,367 INFO L225 Difference]: With dead ends: 21720 [2021-07-13 19:02:52,368 INFO L226 Difference]: Without dead ends: 21720 [2021-07-13 19:02:52,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:02:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21720 states. [2021-07-13 19:02:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21720 to 20577. [2021-07-13 19:02:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20577 states, 20576 states have (on average 1.8844284603421462) internal successors, (38774), 20576 states have internal predecessors, (38774), 0 states have call successors, (0), 0 states 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 19:02:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20577 states to 20577 states and 38774 transitions. [2021-07-13 19:02:52,590 INFO L78 Accepts]: Start accepts. Automaton has 20577 states and 38774 transitions. Word has length 345 [2021-07-13 19:02:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:52,590 INFO L482 AbstractCegarLoop]: Abstraction has 20577 states and 38774 transitions. [2021-07-13 19:02:52,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 19:02:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20577 states and 38774 transitions. [2021-07-13 19:02:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 19:02:52,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:52,613 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 13, 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] [2021-07-13 19:02:52,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:02:52,821 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1790448447, now seen corresponding path program 26 times [2021-07-13 19:02:52,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:52,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396477662] [2021-07-13 19:02:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:53,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:53,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396477662] [2021-07-13 19:02:53,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396477662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:53,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899043295] [2021-07-13 19:02:53,202 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:02:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:02:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899043295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:53,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:53,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-07-13 19:02:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018852338] [2021-07-13 19:02:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:02:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:02:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:02:53,738 INFO L87 Difference]: Start difference. First operand 20577 states and 38774 transitions. Second operand has 31 states, 31 states have (on average 7.129032258064516) internal successors, (221), 31 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 19:02:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:54,215 INFO L93 Difference]: Finished difference Result 23197 states and 43654 transitions. [2021-07-13 19:02:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:02:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.129032258064516) internal successors, (221), 31 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 19:02:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:54,244 INFO L225 Difference]: With dead ends: 23197 [2021-07-13 19:02:54,244 INFO L226 Difference]: Without dead ends: 23197 [2021-07-13 19:02:54,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:02:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23197 states. [2021-07-13 19:02:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23197 to 22054. [2021-07-13 19:02:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22054 states, 22053 states have (on average 1.8840067111050651) internal successors, (41548), 22053 states have internal predecessors, (41548), 0 states have call successors, (0), 0 states 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 19:02:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 41548 transitions. [2021-07-13 19:02:54,484 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 41548 transitions. Word has length 356 [2021-07-13 19:02:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:54,484 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 41548 transitions. [2021-07-13 19:02:54,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 7.129032258064516) internal successors, (221), 31 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 19:02:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 41548 transitions. [2021-07-13 19:02:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-07-13 19:02:54,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:54,508 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:02:54,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:02:54,711 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1526461715, now seen corresponding path program 27 times [2021-07-13 19:02:54,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:54,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909710599] [2021-07-13 19:02:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:55,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909710599] [2021-07-13 19:02:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909710599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365451555] [2021-07-13 19:02:55,042 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:55,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 19:02:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:55,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 19:02:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:55,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365451555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:55,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:55,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-07-13 19:02:55,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148078732] [2021-07-13 19:02:55,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 19:02:55,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:55,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 19:02:55,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:02:55,805 INFO L87 Difference]: Start difference. First operand 22054 states and 41548 transitions. Second operand has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 19:02:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:56,345 INFO L93 Difference]: Finished difference Result 24674 states and 46428 transitions. [2021-07-13 19:02:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:02:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 states have internal predecessors, (232), 0 states have call successors, (0), 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 367 [2021-07-13 19:02:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:56,377 INFO L225 Difference]: With dead ends: 24674 [2021-07-13 19:02:56,377 INFO L226 Difference]: Without dead ends: 24674 [2021-07-13 19:02:56,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:02:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24674 states. [2021-07-13 19:02:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24674 to 23531. [2021-07-13 19:02:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23531 states, 23530 states have (on average 1.8836379090522737) internal successors, (44322), 23530 states have internal predecessors, (44322), 0 states have call successors, (0), 0 states 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 19:02:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23531 states to 23531 states and 44322 transitions. [2021-07-13 19:02:56,626 INFO L78 Accepts]: Start accepts. Automaton has 23531 states and 44322 transitions. Word has length 367 [2021-07-13 19:02:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:56,626 INFO L482 AbstractCegarLoop]: Abstraction has 23531 states and 44322 transitions. [2021-07-13 19:02:56,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 19:02:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 23531 states and 44322 transitions. [2021-07-13 19:02:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-07-13 19:02:56,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:56,651 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:02:56,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:56,851 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:56,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1059461759, now seen corresponding path program 28 times [2021-07-13 19:02:56,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:56,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588305738] [2021-07-13 19:02:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:57,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:57,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588305738] [2021-07-13 19:02:57,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588305738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:57,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692581795] [2021-07-13 19:02:57,202 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:57,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:02:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:57,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:02:57,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692581795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:57,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:57,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-13 19:02:57,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358376345] [2021-07-13 19:02:57,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 19:02:57,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 19:02:57,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:02:57,766 INFO L87 Difference]: Start difference. First operand 23531 states and 44322 transitions. Second operand has 35 states, 35 states have (on average 6.942857142857143) internal successors, (243), 35 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 19:02:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:02:58,446 INFO L93 Difference]: Finished difference Result 26151 states and 49202 transitions. [2021-07-13 19:02:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:02:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.942857142857143) internal successors, (243), 35 states have internal predecessors, (243), 0 states have call successors, (0), 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 378 [2021-07-13 19:02:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:02:58,478 INFO L225 Difference]: With dead ends: 26151 [2021-07-13 19:02:58,478 INFO L226 Difference]: Without dead ends: 26151 [2021-07-13 19:02:58,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 19:02:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-07-13 19:02:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25008. [2021-07-13 19:02:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25008 states, 25007 states have (on average 1.8833126724517135) internal successors, (47096), 25007 states have internal predecessors, (47096), 0 states have call successors, (0), 0 states 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 19:02:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25008 states to 25008 states and 47096 transitions. [2021-07-13 19:02:58,753 INFO L78 Accepts]: Start accepts. Automaton has 25008 states and 47096 transitions. Word has length 378 [2021-07-13 19:02:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:02:58,753 INFO L482 AbstractCegarLoop]: Abstraction has 25008 states and 47096 transitions. [2021-07-13 19:02:58,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.942857142857143) internal successors, (243), 35 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 19:02:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 25008 states and 47096 transitions. [2021-07-13 19:02:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-07-13 19:02:58,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:02:58,783 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:02:58,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:58,985 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:02:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:02:58,985 INFO L82 PathProgramCache]: Analyzing trace with hash -667220909, now seen corresponding path program 29 times [2021-07-13 19:02:58,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:02:58,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141912172] [2021-07-13 19:02:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:02:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:02:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:59,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:02:59,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141912172] [2021-07-13 19:02:59,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141912172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:59,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185028443] [2021-07-13 19:02:59,376 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:02:59,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-13 19:02:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:02:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:02:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:02:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:02:59,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185028443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:02:59,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:02:59,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-07-13 19:02:59,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072467706] [2021-07-13 19:02:59,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:02:59,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:02:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:02:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:02:59,983 INFO L87 Difference]: Start difference. First operand 25008 states and 47096 transitions. Second operand has 37 states, 37 states have (on average 6.864864864864865) internal successors, (254), 37 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 19:03:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:03:00,754 INFO L93 Difference]: Finished difference Result 27628 states and 51976 transitions. [2021-07-13 19:03:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:03:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.864864864864865) internal successors, (254), 37 states have internal predecessors, (254), 0 states have call successors, (0), 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 389 [2021-07-13 19:03:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:03:00,789 INFO L225 Difference]: With dead ends: 27628 [2021-07-13 19:03:00,789 INFO L226 Difference]: Without dead ends: 27628 [2021-07-13 19:03:00,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:03:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27628 states. [2021-07-13 19:03:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27628 to 26485. [2021-07-13 19:03:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26485 states, 26484 states have (on average 1.8830237124301465) internal successors, (49870), 26484 states have internal predecessors, (49870), 0 states have call successors, (0), 0 states 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 19:03:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26485 states to 26485 states and 49870 transitions. [2021-07-13 19:03:01,066 INFO L78 Accepts]: Start accepts. Automaton has 26485 states and 49870 transitions. Word has length 389 [2021-07-13 19:03:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:03:01,066 INFO L482 AbstractCegarLoop]: Abstraction has 26485 states and 49870 transitions. [2021-07-13 19:03:01,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 6.864864864864865) internal successors, (254), 37 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 19:03:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26485 states and 49870 transitions. [2021-07-13 19:03:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-07-13 19:03:01,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:03:01,097 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:03:01,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 19:03:01,298 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:03:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:03:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 726978113, now seen corresponding path program 30 times [2021-07-13 19:03:01,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:03:01,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105982789] [2021-07-13 19:03:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:03:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:03:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:03:01,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:03:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105982789] [2021-07-13 19:03:01,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105982789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175835809] [2021-07-13 19:03:01,730 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:03:02,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-13 19:03:02,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:03:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:03:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:03:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:03:02,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175835809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:02,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:03:02,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-07-13 19:03:02,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856469590] [2021-07-13 19:03:02,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 19:03:02,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:03:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 19:03:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:03:02,573 INFO L87 Difference]: Start difference. First operand 26485 states and 49870 transitions. Second operand has 39 states, 39 states have (on average 6.794871794871795) internal successors, (265), 39 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 19:03:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:03:03,355 INFO L93 Difference]: Finished difference Result 29105 states and 54750 transitions. [2021-07-13 19:03:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:03:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.794871794871795) internal successors, (265), 39 states have internal predecessors, (265), 0 states have call successors, (0), 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 400 [2021-07-13 19:03:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:03:03,480 INFO L225 Difference]: With dead ends: 29105 [2021-07-13 19:03:03,480 INFO L226 Difference]: Without dead ends: 29105 [2021-07-13 19:03:03,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 843.8ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:03:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29105 states. [2021-07-13 19:03:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29105 to 27962. [2021-07-13 19:03:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27962 states, 27961 states have (on average 1.8827652802117234) internal successors, (52644), 27961 states have internal predecessors, (52644), 0 states have call successors, (0), 0 states 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 19:03:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27962 states to 27962 states and 52644 transitions. [2021-07-13 19:03:03,779 INFO L78 Accepts]: Start accepts. Automaton has 27962 states and 52644 transitions. Word has length 400 [2021-07-13 19:03:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:03:03,779 INFO L482 AbstractCegarLoop]: Abstraction has 27962 states and 52644 transitions. [2021-07-13 19:03:03,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 6.794871794871795) internal successors, (265), 39 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 19:03:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 27962 states and 52644 transitions. [2021-07-13 19:03:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-07-13 19:03:03,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:03:03,815 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:03:04,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:03:04,015 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:03:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:03:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1063574637, now seen corresponding path program 31 times [2021-07-13 19:03:04,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:03:04,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930065227] [2021-07-13 19:03:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:03:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:03:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:03:04,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:03:04,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930065227] [2021-07-13 19:03:04,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930065227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:04,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175865156] [2021-07-13 19:03:04,516 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:03:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:03:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 19:03:04,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:03:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:03:05,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175865156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:05,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:03:05,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-07-13 19:03:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98505864] [2021-07-13 19:03:05,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 19:03:05,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:03:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 19:03:05,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:03:05,080 INFO L87 Difference]: Start difference. First operand 27962 states and 52644 transitions. Second operand has 41 states, 41 states have (on average 6.7317073170731705) internal successors, (276), 41 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 19:03:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:03:05,989 INFO L93 Difference]: Finished difference Result 30582 states and 57524 transitions. [2021-07-13 19:03:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:03:05,989 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.7317073170731705) internal successors, (276), 41 states have internal predecessors, (276), 0 states have call successors, (0), 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 411 [2021-07-13 19:03:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:03:06,027 INFO L225 Difference]: With dead ends: 30582 [2021-07-13 19:03:06,027 INFO L226 Difference]: Without dead ends: 30582 [2021-07-13 19:03:06,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 961.2ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 19:03:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30582 states. [2021-07-13 19:03:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30582 to 29439. [2021-07-13 19:03:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29439 states, 29438 states have (on average 1.8825327807595624) internal successors, (55418), 29438 states have internal predecessors, (55418), 0 states have call successors, (0), 0 states 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 19:03:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29439 states to 29439 states and 55418 transitions. [2021-07-13 19:03:06,354 INFO L78 Accepts]: Start accepts. Automaton has 29439 states and 55418 transitions. Word has length 411 [2021-07-13 19:03:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:03:06,354 INFO L482 AbstractCegarLoop]: Abstraction has 29439 states and 55418 transitions. [2021-07-13 19:03:06,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 6.7317073170731705) internal successors, (276), 41 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 19:03:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 29439 states and 55418 transitions. [2021-07-13 19:03:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-07-13 19:03:06,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:03:06,391 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:03:06,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:03:06,591 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:03:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:03:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1234917631, now seen corresponding path program 32 times [2021-07-13 19:03:06,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:03:06,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174436663] [2021-07-13 19:03:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:03:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:03:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:03:07,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:03:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174436663] [2021-07-13 19:03:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174436663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447369733] [2021-07-13 19:03:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:03:07,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:03:07,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:03:07,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:03:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:03:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-13 19:03:07,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447369733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:07,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:03:07,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-07-13 19:03:07,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391620180] [2021-07-13 19:03:07,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 19:03:07,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:03:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 19:03:07,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:03:07,680 INFO L87 Difference]: Start difference. First operand 29439 states and 55418 transitions. Second operand has 43 states, 43 states have (on average 6.674418604651163) internal successors, (287), 43 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 19:03:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:03:08,678 INFO L93 Difference]: Finished difference Result 30916 states and 58192 transitions. [2021-07-13 19:03:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 19:03:08,678 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.674418604651163) internal successors, (287), 43 states have internal predecessors, (287), 0 states have call successors, (0), 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 422 [2021-07-13 19:03:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:03:08,716 INFO L225 Difference]: With dead ends: 30916 [2021-07-13 19:03:08,717 INFO L226 Difference]: Without dead ends: 30916 [2021-07-13 19:03:08,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:03:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30916 states. [2021-07-13 19:03:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30916 to 30916. [2021-07-13 19:03:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30916 states, 30915 states have (on average 1.8823224971696588) internal successors, (58192), 30915 states have internal predecessors, (58192), 0 states have call successors, (0), 0 states 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 19:03:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30916 states to 30916 states and 58192 transitions. [2021-07-13 19:03:09,069 INFO L78 Accepts]: Start accepts. Automaton has 30916 states and 58192 transitions. Word has length 422 [2021-07-13 19:03:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:03:09,070 INFO L482 AbstractCegarLoop]: Abstraction has 30916 states and 58192 transitions. [2021-07-13 19:03:09,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 6.674418604651163) internal successors, (287), 43 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 19:03:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 30916 states and 58192 transitions. [2021-07-13 19:03:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:03:09,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:03:09,106 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:09,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:03:09,306 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:03:09,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:03:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1359981869, now seen corresponding path program 33 times [2021-07-13 19:03:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:03:09,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760375309] [2021-07-13 19:03:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:03:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:03:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:03:11,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:03:11,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760375309] [2021-07-13 19:03:11,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760375309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:11,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242328439] [2021-07-13 19:03:11,390 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:03:12,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-07-13 19:03:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:03:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:03:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:03:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:03:12,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242328439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:12,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:03:12,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-07-13 19:03:12,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320964489] [2021-07-13 19:03:12,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-13 19:03:12,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:03:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-13 19:03:12,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:03:12,757 INFO L87 Difference]: Start difference. First operand 30916 states and 58192 transitions. Second operand has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:03:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:03:34,712 INFO L93 Difference]: Finished difference Result 150995 states and 288642 transitions. [2021-07-13 19:03:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-07-13 19:03:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:03:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:03:34,965 INFO L225 Difference]: With dead ends: 150995 [2021-07-13 19:03:34,965 INFO L226 Difference]: Without dead ends: 150983 [2021-07-13 19:03:34,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32634 ImplicationChecksByTransitivity, 9664.1ms TimeCoverageRelationStatistics Valid=1162, Invalid=102844, Unknown=0, NotChecked=0, Total=104006 [2021-07-13 19:03:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150983 states. [2021-07-13 19:03:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150983 to 32534. [2021-07-13 19:03:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32534 states, 32533 states have (on average 1.8930009528786156) internal successors, (61585), 32533 states have internal predecessors, (61585), 0 states have call successors, (0), 0 states 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 19:03:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32534 states to 32534 states and 61585 transitions. [2021-07-13 19:03:36,111 INFO L78 Accepts]: Start accepts. Automaton has 32534 states and 61585 transitions. Word has length 433 [2021-07-13 19:03:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:03:36,111 INFO L482 AbstractCegarLoop]: Abstraction has 32534 states and 61585 transitions. [2021-07-13 19:03:36,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:03:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 32534 states and 61585 transitions. [2021-07-13 19:03:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:03:36,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:03:36,147 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:36,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:03:36,347 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:03:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:03:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash 454116571, now seen corresponding path program 34 times [2021-07-13 19:03:36,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:03:36,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089677588] [2021-07-13 19:03:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:03:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:03:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:03:38,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:03:38,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089677588] [2021-07-13 19:03:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089677588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:38,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476634660] [2021-07-13 19:03:38,317 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:03:38,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:03:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:03:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:03:38,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:03:38,889 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:03:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:03:39,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476634660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:03:39,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:03:39,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-13 19:03:39,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866158215] [2021-07-13 19:03:39,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-13 19:03:39,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:03:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-13 19:03:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:03:39,624 INFO L87 Difference]: Start difference. First operand 32534 states and 61585 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:04:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:04:03,426 INFO L93 Difference]: Finished difference Result 167871 states and 321305 transitions. [2021-07-13 19:04:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2021-07-13 19:04:03,426 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:04:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:04:03,743 INFO L225 Difference]: With dead ends: 167871 [2021-07-13 19:04:03,743 INFO L226 Difference]: Without dead ends: 167847 [2021-07-13 19:04:03,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38769 ImplicationChecksByTransitivity, 10201.7ms TimeCoverageRelationStatistics Valid=1265, Invalid=118797, Unknown=0, NotChecked=0, Total=120062 [2021-07-13 19:04:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167847 states. [2021-07-13 19:04:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167847 to 33952. [2021-07-13 19:04:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33952 states, 33951 states have (on average 1.8926688462784602) internal successors, (64258), 33951 states have internal predecessors, (64258), 0 states have call successors, (0), 0 states 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 19:04:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33952 states to 33952 states and 64258 transitions. [2021-07-13 19:04:04,949 INFO L78 Accepts]: Start accepts. Automaton has 33952 states and 64258 transitions. Word has length 433 [2021-07-13 19:04:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:04:04,949 INFO L482 AbstractCegarLoop]: Abstraction has 33952 states and 64258 transitions. [2021-07-13 19:04:04,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:04:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33952 states and 64258 transitions. [2021-07-13 19:04:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:04:04,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:04:04,987 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:05,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:04:05,188 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:04:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:04:05,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1557636753, now seen corresponding path program 35 times [2021-07-13 19:04:05,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:04:05,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30470854] [2021-07-13 19:04:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:04:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:04:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:04:07,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:04:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30470854] [2021-07-13 19:04:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30470854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930443827] [2021-07-13 19:04:07,458 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:04:07,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-07-13 19:04:07,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:04:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:04:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:04:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:04:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930443827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:08,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:04:08,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-13 19:04:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808412040] [2021-07-13 19:04:08,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-13 19:04:08,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:04:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-13 19:04:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:04:08,331 INFO L87 Difference]: Start difference. First operand 33952 states and 64258 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:04:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:04:30,585 INFO L93 Difference]: Finished difference Result 153419 states and 293523 transitions. [2021-07-13 19:04:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-07-13 19:04:30,592 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:04:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:04:30,859 INFO L225 Difference]: With dead ends: 153419 [2021-07-13 19:04:30,859 INFO L226 Difference]: Without dead ends: 153407 [2021-07-13 19:04:30,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33405 ImplicationChecksByTransitivity, 9963.8ms TimeCoverageRelationStatistics Valid=1176, Invalid=105426, Unknown=0, NotChecked=0, Total=106602 [2021-07-13 19:04:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153407 states. [2021-07-13 19:04:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153407 to 34047. [2021-07-13 19:04:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34047 states, 34046 states have (on average 1.892703988721142) internal successors, (64439), 34046 states have internal predecessors, (64439), 0 states have call successors, (0), 0 states 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 19:04:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34047 states to 34047 states and 64439 transitions. [2021-07-13 19:04:32,063 INFO L78 Accepts]: Start accepts. Automaton has 34047 states and 64439 transitions. Word has length 433 [2021-07-13 19:04:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:04:32,064 INFO L482 AbstractCegarLoop]: Abstraction has 34047 states and 64439 transitions. [2021-07-13 19:04:32,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:04:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 34047 states and 64439 transitions. [2021-07-13 19:04:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:04:32,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:04:32,101 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:32,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:04:32,302 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:04:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:04:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1389996425, now seen corresponding path program 36 times [2021-07-13 19:04:32,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:04:32,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577330092] [2021-07-13 19:04:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:04:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:04:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:04:34,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:04:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577330092] [2021-07-13 19:04:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577330092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418232153] [2021-07-13 19:04:34,257 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:04:34,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-13 19:04:34,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:04:34,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:04:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:04:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:04:35,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418232153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:04:35,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:04:35,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-13 19:04:35,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95729959] [2021-07-13 19:04:35,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:04:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:04:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:04:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:04:35,375 INFO L87 Difference]: Start difference. First operand 34047 states and 64439 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:05:01,580 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:05:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:05:01,866 INFO L93 Difference]: Finished difference Result 186974 states and 358074 transitions. [2021-07-13 19:05:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2021-07-13 19:05:01,866 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:05:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:05:02,232 INFO L225 Difference]: With dead ends: 186974 [2021-07-13 19:05:02,233 INFO L226 Difference]: Without dead ends: 186938 [2021-07-13 19:05:02,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45735 ImplicationChecksByTransitivity, 11251.0ms TimeCoverageRelationStatistics Valid=1372, Invalid=136640, Unknown=0, NotChecked=0, Total=138012 [2021-07-13 19:05:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186938 states. [2021-07-13 19:05:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186938 to 35280. [2021-07-13 19:05:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.8920037416026532) internal successors, (66748), 35279 states have internal predecessors, (66748), 0 states have call successors, (0), 0 states 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 19:05:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 66748 transitions. [2021-07-13 19:05:03,510 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 66748 transitions. Word has length 433 [2021-07-13 19:05:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:05:03,511 INFO L482 AbstractCegarLoop]: Abstraction has 35280 states and 66748 transitions. [2021-07-13 19:05:03,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:05:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 66748 transitions. [2021-07-13 19:05:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:05:03,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:05:03,553 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:03,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 19:05:03,754 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:05:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:05:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash -816582073, now seen corresponding path program 37 times [2021-07-13 19:05:03,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:05:03,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515071650] [2021-07-13 19:05:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:05:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:05:04,419 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:05:04,884 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:05:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:05:06,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:05:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515071650] [2021-07-13 19:05:06,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515071650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:05:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682836777] [2021-07-13 19:05:06,084 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:05:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:05:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:05:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:05:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:05:06,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682836777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:05:06,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:05:06,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-13 19:05:06,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332038168] [2021-07-13 19:05:06,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-13 19:05:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:05:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-13 19:05:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:05:06,976 INFO L87 Difference]: Start difference. First operand 35280 states and 66748 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:05:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:05:29,739 INFO L93 Difference]: Finished difference Result 154911 states and 296328 transitions. [2021-07-13 19:05:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-07-13 19:05:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:05:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:05:30,159 INFO L225 Difference]: With dead ends: 154911 [2021-07-13 19:05:30,159 INFO L226 Difference]: Without dead ends: 154899 [2021-07-13 19:05:30,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33664 ImplicationChecksByTransitivity, 10164.3ms TimeCoverageRelationStatistics Valid=1180, Invalid=106076, Unknown=0, NotChecked=0, Total=107256 [2021-07-13 19:05:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154899 states. [2021-07-13 19:05:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154899 to 35415. [2021-07-13 19:05:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35415 states, 35414 states have (on average 1.8920765798836618) internal successors, (67006), 35414 states have internal predecessors, (67006), 0 states have call successors, (0), 0 states 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 19:05:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35415 states to 35415 states and 67006 transitions. [2021-07-13 19:05:31,633 INFO L78 Accepts]: Start accepts. Automaton has 35415 states and 67006 transitions. Word has length 433 [2021-07-13 19:05:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:05:31,633 INFO L482 AbstractCegarLoop]: Abstraction has 35415 states and 67006 transitions. [2021-07-13 19:05:31,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:05:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 35415 states and 67006 transitions. [2021-07-13 19:05:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:05:31,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:05:31,673 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:31,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 19:05:31,891 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:05:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:05:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash -984222401, now seen corresponding path program 38 times [2021-07-13 19:05:31,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:05:31,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036624676] [2021-07-13 19:05:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:05:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:05:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:05:34,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:05:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036624676] [2021-07-13 19:05:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036624676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:05:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707608478] [2021-07-13 19:05:34,649 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:05:34,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:05:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:05:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:05:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:05:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:05:35,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707608478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:05:35,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:05:35,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-13 19:05:35,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928435806] [2021-07-13 19:05:35,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:05:35,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:05:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:05:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:05:35,468 INFO L87 Difference]: Start difference. First operand 35415 states and 67006 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:05:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:05:59,845 INFO L93 Difference]: Finished difference Result 171634 states and 328702 transitions. [2021-07-13 19:05:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2021-07-13 19:05:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:05:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:06:00,134 INFO L225 Difference]: With dead ends: 171634 [2021-07-13 19:06:00,134 INFO L226 Difference]: Without dead ends: 171610 [2021-07-13 19:06:00,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39609 ImplicationChecksByTransitivity, 10904.6ms TimeCoverageRelationStatistics Valid=1279, Invalid=121571, Unknown=0, NotChecked=0, Total=122850 [2021-07-13 19:06:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171610 states. [2021-07-13 19:06:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171610 to 35440. [2021-07-13 19:06:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35440 states, 35439 states have (on average 1.8921527131126725) internal successors, (67056), 35439 states have internal predecessors, (67056), 0 states have call successors, (0), 0 states 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 19:06:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35440 states to 35440 states and 67056 transitions. [2021-07-13 19:06:01,398 INFO L78 Accepts]: Start accepts. Automaton has 35440 states and 67056 transitions. Word has length 433 [2021-07-13 19:06:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:06:01,399 INFO L482 AbstractCegarLoop]: Abstraction has 35440 states and 67056 transitions. [2021-07-13 19:06:01,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:06:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35440 states and 67056 transitions. [2021-07-13 19:06:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:06:01,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:06:01,438 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:01,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:06:01,639 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:06:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:06:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -84178615, now seen corresponding path program 39 times [2021-07-13 19:06:01,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:06:01,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941292849] [2021-07-13 19:06:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:06:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:06:02,682 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:06:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:06:03,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:06:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941292849] [2021-07-13 19:06:03,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941292849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:06:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589572146] [2021-07-13 19:06:03,976 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:06:04,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-13 19:06:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:06:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:06:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:06:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:06:05,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589572146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:06:05,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:06:05,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-13 19:06:05,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438959616] [2021-07-13 19:06:05,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:06:05,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:06:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:06:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:06:05,218 INFO L87 Difference]: Start difference. First operand 35440 states and 67056 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:06:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:06:31,067 INFO L93 Difference]: Finished difference Result 172437 states and 330220 transitions. [2021-07-13 19:06:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2021-07-13 19:06:31,068 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:06:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:06:31,498 INFO L225 Difference]: With dead ends: 172437 [2021-07-13 19:06:31,498 INFO L226 Difference]: Without dead ends: 172413 [2021-07-13 19:06:31,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40743 ImplicationChecksByTransitivity, 11519.3ms TimeCoverageRelationStatistics Valid=1295, Invalid=124375, Unknown=0, NotChecked=0, Total=125670 [2021-07-13 19:06:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172413 states. [2021-07-13 19:06:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172413 to 35755. [2021-07-13 19:06:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35755 states, 35754 states have (on average 1.8921798959556972) internal successors, (67653), 35754 states have internal predecessors, (67653), 0 states have call successors, (0), 0 states 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 19:06:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35755 states to 35755 states and 67653 transitions. [2021-07-13 19:06:32,875 INFO L78 Accepts]: Start accepts. Automaton has 35755 states and 67653 transitions. Word has length 433 [2021-07-13 19:06:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:06:32,875 INFO L482 AbstractCegarLoop]: Abstraction has 35755 states and 67653 transitions. [2021-07-13 19:06:32,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:06:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 35755 states and 67653 transitions. [2021-07-13 19:06:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:06:32,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:06:32,917 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:33,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:06:33,118 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:06:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:06:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash -81940143, now seen corresponding path program 40 times [2021-07-13 19:06:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:06:33,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553119548] [2021-07-13 19:06:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:06:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:06:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:06:35,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:06:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553119548] [2021-07-13 19:06:35,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553119548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:06:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158974493] [2021-07-13 19:06:35,249 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:06:35,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:06:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:06:35,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:06:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:06:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:06:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158974493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:06:36,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:06:36,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-07-13 19:06:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928671788] [2021-07-13 19:06:36,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-13 19:06:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:06:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-13 19:06:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:06:36,135 INFO L87 Difference]: Start difference. First operand 35755 states and 67653 transitions. Second operand has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:07:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:07:05,185 INFO L93 Difference]: Finished difference Result 208203 states and 398901 transitions. [2021-07-13 19:07:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2021-07-13 19:07:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:07:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:07:05,906 INFO L225 Difference]: With dead ends: 208203 [2021-07-13 19:07:05,906 INFO L226 Difference]: Without dead ends: 208155 [2021-07-13 19:07:05,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53604 ImplicationChecksByTransitivity, 12366.7ms TimeCoverageRelationStatistics Valid=1483, Invalid=156523, Unknown=0, NotChecked=0, Total=158006 [2021-07-13 19:07:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208155 states. [2021-07-13 19:07:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208155 to 36602. [2021-07-13 19:07:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36602 states, 36601 states have (on average 1.891533018223546) internal successors, (69232), 36601 states have internal predecessors, (69232), 0 states have call successors, (0), 0 states 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 19:07:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36602 states to 36602 states and 69232 transitions. [2021-07-13 19:07:07,676 INFO L78 Accepts]: Start accepts. Automaton has 36602 states and 69232 transitions. Word has length 433 [2021-07-13 19:07:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:07:07,678 INFO L482 AbstractCegarLoop]: Abstraction has 36602 states and 69232 transitions. [2021-07-13 19:07:07,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:07:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 36602 states and 69232 transitions. [2021-07-13 19:07:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:07:07,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:07:07,720 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:07,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:07:07,938 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:07:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:07:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2063345661, now seen corresponding path program 41 times [2021-07-13 19:07:07,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:07:07,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297239709] [2021-07-13 19:07:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:07:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:07:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:07:10,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:07:10,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297239709] [2021-07-13 19:07:10,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297239709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:07:10,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137933115] [2021-07-13 19:07:10,025 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:07:10,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-13 19:07:10,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:07:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:07:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:07:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:07:10,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137933115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:07:10,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:07:10,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-13 19:07:10,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851271534] [2021-07-13 19:07:10,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-13 19:07:10,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:07:10,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-13 19:07:10,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:07:10,961 INFO L87 Difference]: Start difference. First operand 36602 states and 69232 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:07:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:07:33,371 INFO L93 Difference]: Finished difference Result 156403 states and 299133 transitions. [2021-07-13 19:07:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2021-07-13 19:07:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:07:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:07:33,642 INFO L225 Difference]: With dead ends: 156403 [2021-07-13 19:07:33,642 INFO L226 Difference]: Without dead ends: 156391 [2021-07-13 19:07:33,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33924 ImplicationChecksByTransitivity, 9632.5ms TimeCoverageRelationStatistics Valid=1184, Invalid=106728, Unknown=0, NotChecked=0, Total=107912 [2021-07-13 19:07:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156391 states. [2021-07-13 19:07:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156391 to 36777. [2021-07-13 19:07:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36777 states, 36776 states have (on average 1.8916412877963888) internal successors, (69567), 36776 states have internal predecessors, (69567), 0 states have call successors, (0), 0 states 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 19:07:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36777 states to 36777 states and 69567 transitions. [2021-07-13 19:07:34,874 INFO L78 Accepts]: Start accepts. Automaton has 36777 states and 69567 transitions. Word has length 433 [2021-07-13 19:07:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:07:34,874 INFO L482 AbstractCegarLoop]: Abstraction has 36777 states and 69567 transitions. [2021-07-13 19:07:34,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:07:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 36777 states and 69567 transitions. [2021-07-13 19:07:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:07:34,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:07:34,915 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:35,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:07:35,122 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:07:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:07:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1895705333, now seen corresponding path program 42 times [2021-07-13 19:07:35,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:07:35,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170817852] [2021-07-13 19:07:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:07:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:07:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:07:37,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:07:37,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170817852] [2021-07-13 19:07:37,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170817852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:07:37,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815956981] [2021-07-13 19:07:37,201 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:07:37,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-13 19:07:37,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:07:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:07:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:07:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:07:38,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815956981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:07:38,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:07:38,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-13 19:07:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562154126] [2021-07-13 19:07:38,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:07:38,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:07:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:07:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:07:38,348 INFO L87 Difference]: Start difference. First operand 36777 states and 69567 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:08:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:08:03,264 INFO L93 Difference]: Finished difference Result 173126 states and 331507 transitions. [2021-07-13 19:08:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 345 states. [2021-07-13 19:08:03,265 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:08:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:08:03,593 INFO L225 Difference]: With dead ends: 173126 [2021-07-13 19:08:03,593 INFO L226 Difference]: Without dead ends: 173102 [2021-07-13 19:08:03,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39891 ImplicationChecksByTransitivity, 10752.7ms TimeCoverageRelationStatistics Valid=1283, Invalid=122269, Unknown=0, NotChecked=0, Total=123552 [2021-07-13 19:08:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173102 states. [2021-07-13 19:08:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173102 to 36842. [2021-07-13 19:08:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36842 states, 36841 states have (on average 1.891751038245433) internal successors, (69694), 36841 states have internal predecessors, (69694), 0 states have call successors, (0), 0 states 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 19:08:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36842 states to 36842 states and 69694 transitions. [2021-07-13 19:08:05,059 INFO L78 Accepts]: Start accepts. Automaton has 36842 states and 69694 transitions. Word has length 433 [2021-07-13 19:08:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:08:05,059 INFO L482 AbstractCegarLoop]: Abstraction has 36842 states and 69694 transitions. [2021-07-13 19:08:05,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:08:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36842 states and 69694 transitions. [2021-07-13 19:08:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:08:05,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:08:05,100 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:05,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:08:05,301 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:08:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:08:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1499218177, now seen corresponding path program 43 times [2021-07-13 19:08:05,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:08:05,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576479186] [2021-07-13 19:08:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:08:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:08:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:08:07,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:08:07,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576479186] [2021-07-13 19:08:07,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576479186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:08:07,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382552379] [2021-07-13 19:08:07,425 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:08:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:08:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:08:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:08:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:08:08,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382552379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:08:08,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:08:08,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-13 19:08:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005991420] [2021-07-13 19:08:08,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:08:08,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:08:08,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:08:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:08:08,258 INFO L87 Difference]: Start difference. First operand 36842 states and 69694 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:08:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:08:30,964 INFO L93 Difference]: Finished difference Result 156843 states and 299985 transitions. [2021-07-13 19:08:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-07-13 19:08:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:08:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:08:31,247 INFO L225 Difference]: With dead ends: 156843 [2021-07-13 19:08:31,247 INFO L226 Difference]: Without dead ends: 156831 [2021-07-13 19:08:31,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34710 ImplicationChecksByTransitivity, 9901.0ms TimeCoverageRelationStatistics Valid=1198, Invalid=109358, Unknown=0, NotChecked=0, Total=110556 [2021-07-13 19:08:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156831 states. [2021-07-13 19:08:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156831 to 36937. [2021-07-13 19:08:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36937 states, 36936 states have (on average 1.8917857916395928) internal successors, (69875), 36936 states have internal predecessors, (69875), 0 states have call successors, (0), 0 states 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 19:08:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36937 states to 36937 states and 69875 transitions. [2021-07-13 19:08:32,514 INFO L78 Accepts]: Start accepts. Automaton has 36937 states and 69875 transitions. Word has length 433 [2021-07-13 19:08:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:08:32,514 INFO L482 AbstractCegarLoop]: Abstraction has 36937 states and 69875 transitions. [2021-07-13 19:08:32,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:08:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36937 states and 69875 transitions. [2021-07-13 19:08:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:08:32,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:08:32,557 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:32,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:08:32,765 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:08:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:08:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1496979705, now seen corresponding path program 44 times [2021-07-13 19:08:32,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:08:32,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149605136] [2021-07-13 19:08:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:08:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:08:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:08:34,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:08:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149605136] [2021-07-13 19:08:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149605136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:08:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897157632] [2021-07-13 19:08:34,741 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:08:34,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:08:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:08:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:08:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:08:35,513 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:08:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:08:35,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897157632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:08:35,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:08:35,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-07-13 19:08:35,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442113163] [2021-07-13 19:08:35,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-13 19:08:35,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:08:35,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-13 19:08:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:08:35,811 INFO L87 Difference]: Start difference. First operand 36937 states and 69875 transitions. Second operand has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:09:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:09:02,280 INFO L93 Difference]: Finished difference Result 192033 states and 367900 transitions. [2021-07-13 19:09:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 369 states. [2021-07-13 19:09:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:09:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:09:02,615 INFO L225 Difference]: With dead ends: 192033 [2021-07-13 19:09:02,615 INFO L226 Difference]: Without dead ends: 191997 [2021-07-13 19:09:02,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46647 ImplicationChecksByTransitivity, 11416.0ms TimeCoverageRelationStatistics Valid=1386, Invalid=139614, Unknown=0, NotChecked=0, Total=141000 [2021-07-13 19:09:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191997 states. [2021-07-13 19:09:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191997 to 36762. [2021-07-13 19:09:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36762 states, 36761 states have (on average 1.891678681211066) internal successors, (69540), 36761 states have internal predecessors, (69540), 0 states have call successors, (0), 0 states 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 19:09:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36762 states to 36762 states and 69540 transitions. [2021-07-13 19:09:03,992 INFO L78 Accepts]: Start accepts. Automaton has 36762 states and 69540 transitions. Word has length 433 [2021-07-13 19:09:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:09:03,992 INFO L482 AbstractCegarLoop]: Abstraction has 36762 states and 69540 transitions. [2021-07-13 19:09:03,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:09:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 36762 states and 69540 transitions. [2021-07-13 19:09:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:09:04,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:09:04,035 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:04,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:09:04,236 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:09:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:09:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1037981431, now seen corresponding path program 45 times [2021-07-13 19:09:04,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:09:04,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509957817] [2021-07-13 19:09:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:09:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:09:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:09:06,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:09:06,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509957817] [2021-07-13 19:09:06,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509957817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:09:06,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378129473] [2021-07-13 19:09:06,645 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:09:07,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-07-13 19:09:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:09:07,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:09:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:09:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:09:07,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378129473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:09:07,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:09:07,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-13 19:09:07,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128583208] [2021-07-13 19:09:07,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 19:09:07,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:09:07,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 19:09:07,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:09:07,869 INFO L87 Difference]: Start difference. First operand 36762 states and 69540 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:09:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:09:32,493 INFO L93 Difference]: Finished difference Result 174454 states and 334032 transitions. [2021-07-13 19:09:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 351 states. [2021-07-13 19:09:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 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 433 [2021-07-13 19:09:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:09:32,810 INFO L225 Difference]: With dead ends: 174454 [2021-07-13 19:09:32,810 INFO L226 Difference]: Without dead ends: 174430 [2021-07-13 19:09:32,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41604 ImplicationChecksByTransitivity, 11098.9ms TimeCoverageRelationStatistics Valid=1307, Invalid=126499, Unknown=0, NotChecked=0, Total=127806 [2021-07-13 19:09:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174430 states. [2021-07-13 19:09:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174430 to 37157. [2021-07-13 19:09:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37157 states, 37156 states have (on average 1.8917806007105178) internal successors, (70291), 37156 states have internal predecessors, (70291), 0 states have call successors, (0), 0 states 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 19:09:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37157 states to 37157 states and 70291 transitions. [2021-07-13 19:09:34,280 INFO L78 Accepts]: Start accepts. Automaton has 37157 states and 70291 transitions. Word has length 433 [2021-07-13 19:09:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:09:34,280 INFO L482 AbstractCegarLoop]: Abstraction has 37157 states and 70291 transitions. [2021-07-13 19:09:34,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 19:09:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 37157 states and 70291 transitions. [2021-07-13 19:09:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-13 19:09:34,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:09:34,325 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:34,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:09:34,526 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 19:09:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:09:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1035742959, now seen corresponding path program 46 times [2021-07-13 19:09:34,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:09:34,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630419872] [2021-07-13 19:09:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:09:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:09:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:09:36,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:09:36,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630419872] [2021-07-13 19:09:36,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630419872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:09:36,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545959095] [2021-07-13 19:09:36,743 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:09:36,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:09:36,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:09:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-13 19:09:36,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-13 19:09:37,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 19:09:37,561 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:09:37,563 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:09:37,564 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:09:37,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:09:37 BasicIcfg [2021-07-13 19:09:37,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:09:37,565 INFO L168 Benchmark]: Toolchain (without parser) took 721590.71 ms. Allocated memory was 211.8 MB in the beginning and 3.4 GB in the end (delta: 3.2 GB). Free memory was 173.0 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 672.8 MB. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 191.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 438.54 ms. Allocated memory is still 211.8 MB. Free memory was 172.8 MB in the beginning and 166.2 MB in the end (delta: 6.6 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.32 ms. Allocated memory is still 211.8 MB. Free memory was 166.2 MB in the beginning and 163.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 INFO L168 Benchmark]: Boogie Preprocessor took 18.26 ms. Allocated memory is still 211.8 MB. Free memory was 163.7 MB in the beginning and 162.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 INFO L168 Benchmark]: RCFGBuilder took 340.34 ms. Allocated memory is still 211.8 MB. Free memory was 162.3 MB in the beginning and 176.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 INFO L168 Benchmark]: TraceAbstraction took 720747.31 ms. Allocated memory was 211.8 MB in the beginning and 3.4 GB in the end (delta: 3.2 GB). Free memory was 176.8 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 676.2 MB. Max. memory is 8.0 GB. [2021-07-13 19:09:37,565 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 211.8 MB. Free memory is still 191.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 438.54 ms. Allocated memory is still 211.8 MB. Free memory was 172.8 MB in the beginning and 166.2 MB in the end (delta: 6.6 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.32 ms. Allocated memory is still 211.8 MB. Free memory was 166.2 MB in the beginning and 163.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.26 ms. Allocated memory is still 211.8 MB. Free memory was 163.7 MB in the beginning and 162.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.34 ms. Allocated memory is still 211.8 MB. Free memory was 162.3 MB in the beginning and 176.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 720747.31 ms. Allocated memory was 211.8 MB in the beginning and 3.4 GB in the end (delta: 3.2 GB). Free memory was 176.8 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 676.2 MB. 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 analyzing trace of length 434 with TraceHistMax 20,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 720666.6ms, OverallIterations: 49, TraceHistogramMax: 20, EmptinessCheckTime: 994.2ms, AutomataDifference: 618822.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 63717 SDtfs, 202968 SDslu, 3939914 SDs, 0 SdLazy, 590324 SolverSat, 13160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 152626.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25918 GetRequests, 15541 SyntacticMatches, 26 SemanticMatches, 10351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026321 ImplicationChecksByTransitivity, 415683.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37157occurred in iteration=48, InterpolantAutomatonStates: 9928, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21711.8ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1777727 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1548.2ms SsaConstructionTime, 6982.3ms SatisfiabilityAnalysisTime, 55542.0ms InterpolantComputationTime, 27082 NumberOfCodeBlocks, 26481 NumberOfCodeBlocksAsserted, 444 NumberOfCheckSat, 26989 ConstructedInterpolants, 0 QuantifiedInterpolants, 109766 SizeOfPredicates, 1166 NumberOfNonLiveVariables, 25953 ConjunctsInSsa, 2829 ConjunctsInUnsatCore, 93 InterpolantComputations, 4 PerfectInterpolantSequences, 41720/176669 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