/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 13:54:46,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 13:54:46,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 13:54:46,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 13:54:46,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 13:54:46,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 13:54:46,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 13:54:46,975 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 [2021-08-06 13:54:46,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 13:54:46,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 13:54:46,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 13:54:46,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 13:54:46,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 13:54:46,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 13:54:46,998 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 13:54:46,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 13:54:46,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 13:54:46,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 13:54:46,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 13:54:46,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 13:54:46,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 13:54:46,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 13:54:47,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 13:54:47,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 13:54:47,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 13:54:47,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 13:54:47,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 13:54:47,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 13:54:47,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 13:54:47,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 13:54:47,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 13:54:47,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 13:54:47,336 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 13:54:47,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-08-06 13:54:47,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a16cc373e/69a020e80f5b40a494d729ac53809b6c/FLAGf824140a8 [2021-08-06 13:54:47,800 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 13:54:47,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-08-06 13:54:47,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a16cc373e/69a020e80f5b40a494d729ac53809b6c/FLAGf824140a8 [2021-08-06 13:54:47,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a16cc373e/69a020e80f5b40a494d729ac53809b6c [2021-08-06 13:54:47,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 13:54:47,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 13:54:47,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 13:54:47,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 13:54:47,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 13:54:47,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 01:54:47" (1/1) ... [2021-08-06 13:54:47,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135c5884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:47, skipping insertion in model container [2021-08-06 13:54:47,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 01:54:47" (1/1) ... [2021-08-06 13:54:47,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 13:54:47,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 13:54:48,004 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-08-06 13:54:48,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 13:54:48,275 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 13:54:48,282 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-08-06 13:54:48,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 13:54:48,398 INFO L208 MainTranslator]: Completed translation [2021-08-06 13:54:48,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48 WrapperNode [2021-08-06 13:54:48,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 13:54:48,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 13:54:48,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 13:54:48,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 13:54:48,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 13:54:48,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 13:54:48,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 13:54:48,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 13:54:48,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 13:54:48,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 13:54:48,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 13:54:48,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 13:54:48,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (1/1) ... [2021-08-06 13:54:48,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 13:54:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:48,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 13:54:48,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 13:54:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 13:54:48,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 13:54:48,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-06 13:54:48,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-08-06 13:54:48,643 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-08-06 13:54:48,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 13:54:48,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 13:54:48,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 13:54:48,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 13:54:48,645 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 13:54:49,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 13:54:49,037 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-06 13:54:49,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 01:54:49 BoogieIcfgContainer [2021-08-06 13:54:49,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 13:54:49,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 13:54:49,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 13:54:49,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 13:54:49,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 01:54:47" (1/3) ... [2021-08-06 13:54:49,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ea2ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 01:54:49, skipping insertion in model container [2021-08-06 13:54:49,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:54:48" (2/3) ... [2021-08-06 13:54:49,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ea2ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 01:54:49, skipping insertion in model container [2021-08-06 13:54:49,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 01:54:49" (3/3) ... [2021-08-06 13:54:49,043 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-08-06 13:54:49,046 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 13:54:49,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 13:54:49,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 13:54:49,046 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 13:54:49,063 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,063 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,063 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,064 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,065 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,066 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,067 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,069 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,069 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,069 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,069 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,069 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,069 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,070 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,070 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:54:49,075 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-08-06 13:54:49,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 13:54:49,102 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 13:54:49,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-06 13:54:49,108 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 94 transitions, 196 flow [2021-08-06 13:54:49,125 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 13:54:49,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:49,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:49,137 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1512510452, now seen corresponding path program 1 times [2021-08-06 13:54:49,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:49,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957014143] [2021-08-06 13:54:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:49,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:54:49,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:49,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957014143] [2021-08-06 13:54:49,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957014143] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:54:49,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:54:49,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 13:54:49,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459347345] [2021-08-06 13:54:49,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-06 13:54:49,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-06 13:54:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-06 13:54:49,289 INFO L87 Difference]: Start difference. First operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:49,303 INFO L93 Difference]: Finished difference Result 342 states and 642 transitions. [2021-08-06 13:54:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-06 13:54:49,304 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-06 13:54:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:49,311 INFO L225 Difference]: With dead ends: 342 [2021-08-06 13:54:49,312 INFO L226 Difference]: Without dead ends: 297 [2021-08-06 13:54:49,312 INFO L781 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 [2021-08-06 13:54:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-06 13:54:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-08-06 13:54:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.864864864864865) internal successors, (552), 296 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 552 transitions. [2021-08-06 13:54:49,346 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 552 transitions. Word has length 61 [2021-08-06 13:54:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:49,346 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 552 transitions. [2021-08-06 13:54:49,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 552 transitions. [2021-08-06 13:54:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 13:54:49,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:49,349 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:49,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 13:54:49,349 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:49,350 INFO L82 PathProgramCache]: Analyzing trace with hash 474971308, now seen corresponding path program 1 times [2021-08-06 13:54:49,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:49,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257478187] [2021-08-06 13:54:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:49,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:54:49,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257478187] [2021-08-06 13:54:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257478187] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:54:49,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:54:49,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:54:49,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200158033] [2021-08-06 13:54:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:54:49,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:54:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:54:49,417 INFO L87 Difference]: Start difference. First operand 297 states and 552 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:49,431 INFO L93 Difference]: Finished difference Result 357 states and 672 transitions. [2021-08-06 13:54:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:54:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-06 13:54:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:49,434 INFO L225 Difference]: With dead ends: 357 [2021-08-06 13:54:49,434 INFO L226 Difference]: Without dead ends: 357 [2021-08-06 13:54:49,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:54:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-06 13:54:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 312. [2021-08-06 13:54:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.8713826366559485) internal successors, (582), 311 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 582 transitions. [2021-08-06 13:54:49,446 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 582 transitions. Word has length 61 [2021-08-06 13:54:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:49,447 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 582 transitions. [2021-08-06 13:54:49,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 582 transitions. [2021-08-06 13:54:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-06 13:54:49,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:49,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:49,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 13:54:49,449 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash 270890588, now seen corresponding path program 1 times [2021-08-06 13:54:49,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:49,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822922067] [2021-08-06 13:54:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:49,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:54:49,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:49,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822922067] [2021-08-06 13:54:49,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822922067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:49,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730010698] [2021-08-06 13:54:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:49,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:49,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:49,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:49,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 13:54:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:49,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-06 13:54:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 13:54:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730010698] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:54:49,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 13:54:49,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-06 13:54:49,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057889043] [2021-08-06 13:54:49,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:54:49,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:54:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 13:54:49,934 INFO L87 Difference]: Start difference. First operand 312 states and 582 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:49,945 INFO L93 Difference]: Finished difference Result 438 states and 834 transitions. [2021-08-06 13:54:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:54:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-06 13:54:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:49,948 INFO L225 Difference]: With dead ends: 438 [2021-08-06 13:54:49,948 INFO L226 Difference]: Without dead ends: 438 [2021-08-06 13:54:49,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 13:54:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-06 13:54:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 330. [2021-08-06 13:54:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.878419452887538) internal successors, (618), 329 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 618 transitions. [2021-08-06 13:54:49,959 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 618 transitions. Word has length 66 [2021-08-06 13:54:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:49,959 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 618 transitions. [2021-08-06 13:54:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 618 transitions. [2021-08-06 13:54:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-06 13:54:49,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:49,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:50,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 13:54:50,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:50,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 564031543, now seen corresponding path program 1 times [2021-08-06 13:54:50,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:50,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439470146] [2021-08-06 13:54:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:50,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 13:54:50,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:50,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439470146] [2021-08-06 13:54:50,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439470146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:50,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977715779] [2021-08-06 13:54:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:50,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:50,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:50,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:50,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 13:54:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 13:54:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 13:54:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977715779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:50,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:54:50,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 13:54:50,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205928651] [2021-08-06 13:54:50,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 13:54:50,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 13:54:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 13:54:50,738 INFO L87 Difference]: Start difference. First operand 330 states and 618 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:50,775 INFO L93 Difference]: Finished difference Result 458 states and 874 transitions. [2021-08-06 13:54:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 13:54:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-06 13:54:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:50,778 INFO L225 Difference]: With dead ends: 458 [2021-08-06 13:54:50,778 INFO L226 Difference]: Without dead ends: 458 [2021-08-06 13:54:50,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 13:54:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-06 13:54:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 410. [2021-08-06 13:54:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.902200488997555) internal successors, (778), 409 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 778 transitions. [2021-08-06 13:54:50,786 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 778 transitions. Word has length 74 [2021-08-06 13:54:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:50,786 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 778 transitions. [2021-08-06 13:54:50,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 778 transitions. [2021-08-06 13:54:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-06 13:54:50,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:50,787 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:50,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 13:54:51,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-06 13:54:51,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash -780159865, now seen corresponding path program 2 times [2021-08-06 13:54:51,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:51,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619711224] [2021-08-06 13:54:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:51,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 13:54:51,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:51,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619711224] [2021-08-06 13:54:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619711224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:51,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077846271] [2021-08-06 13:54:51,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 13:54:51,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:51,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:51,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 13:54:51,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 13:54:51,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:54:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 13:54:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 13:54:51,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077846271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:51,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:54:51,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 13:54:51,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170311450] [2021-08-06 13:54:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 13:54:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 13:54:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 13:54:51,571 INFO L87 Difference]: Start difference. First operand 410 states and 778 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:51,605 INFO L93 Difference]: Finished difference Result 732 states and 1422 transitions. [2021-08-06 13:54:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 13:54:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-06 13:54:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:51,607 INFO L225 Difference]: With dead ends: 732 [2021-08-06 13:54:51,608 INFO L226 Difference]: Without dead ends: 732 [2021-08-06 13:54:51,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 13:54:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-08-06 13:54:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 594. [2021-08-06 13:54:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.9325463743676223) internal successors, (1146), 593 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1146 transitions. [2021-08-06 13:54:51,618 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1146 transitions. Word has length 79 [2021-08-06 13:54:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:51,618 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1146 transitions. [2021-08-06 13:54:51,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1146 transitions. [2021-08-06 13:54:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-06 13:54:51,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:51,620 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:51,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 13:54:51,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:51,838 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1666798434, now seen corresponding path program 3 times [2021-08-06 13:54:51,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:51,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171227452] [2021-08-06 13:54:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:51,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 13:54:51,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:51,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171227452] [2021-08-06 13:54:51,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171227452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:51,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228313816] [2021-08-06 13:54:51,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 13:54:51,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:51,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:51,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:51,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 13:54:52,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 13:54:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:54:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 13:54:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 13:54:52,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228313816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:52,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:54:52,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 13:54:52,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072817907] [2021-08-06 13:54:52,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 13:54:52,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 13:54:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 13:54:52,547 INFO L87 Difference]: Start difference. First operand 594 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:53,295 INFO L93 Difference]: Finished difference Result 1220 states and 2398 transitions. [2021-08-06 13:54:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 13:54:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-08-06 13:54:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:53,299 INFO L225 Difference]: With dead ends: 1220 [2021-08-06 13:54:53,300 INFO L226 Difference]: Without dead ends: 1220 [2021-08-06 13:54:53,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 13:54:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-08-06 13:54:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 938. [2021-08-06 13:54:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.9573105656350054) internal successors, (1834), 937 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1834 transitions. [2021-08-06 13:54:53,317 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1834 transitions. Word has length 87 [2021-08-06 13:54:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:53,317 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1834 transitions. [2021-08-06 13:54:53,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1834 transitions. [2021-08-06 13:54:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-06 13:54:53,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:53,319 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:53,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 13:54:53,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:53,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1700492525, now seen corresponding path program 4 times [2021-08-06 13:54:53,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:53,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880775598] [2021-08-06 13:54:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:53,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-06 13:54:53,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:53,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880775598] [2021-08-06 13:54:53,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880775598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:53,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008261740] [2021-08-06 13:54:53,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 13:54:53,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:53,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:53,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:53,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 13:54:53,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 13:54:53,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:54:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 13:54:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-06 13:54:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008261740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:54,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:54:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 13:54:54,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208657948] [2021-08-06 13:54:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 13:54:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 13:54:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 13:54:54,258 INFO L87 Difference]: Start difference. First operand 938 states and 1834 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:54,324 INFO L93 Difference]: Finished difference Result 1194 states and 2346 transitions. [2021-08-06 13:54:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 13:54:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-06 13:54:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:54,328 INFO L225 Difference]: With dead ends: 1194 [2021-08-06 13:54:54,328 INFO L226 Difference]: Without dead ends: 1194 [2021-08-06 13:54:54,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-06 13:54:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-06 13:54:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1098. [2021-08-06 13:54:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 1.9635369188696445) internal successors, (2154), 1097 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2154 transitions. [2021-08-06 13:54:54,344 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2154 transitions. Word has length 100 [2021-08-06 13:54:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:54,344 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2154 transitions. [2021-08-06 13:54:54,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2154 transitions. [2021-08-06 13:54:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-06 13:54:54,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:54,347 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:54,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-06 13:54:54,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:54,564 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:54,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2143614269, now seen corresponding path program 5 times [2021-08-06 13:54:54,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:54,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808885818] [2021-08-06 13:54:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:54,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-06 13:54:54,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:54,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808885818] [2021-08-06 13:54:54,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808885818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:54,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045193360] [2021-08-06 13:54:54,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 13:54:54,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:54,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:54,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 13:54:54,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 13:54:54,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:54:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 13:54:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-08-06 13:54:55,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045193360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:55,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:54:55,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 13:54:55,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623229367] [2021-08-06 13:54:55,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 13:54:55,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 13:54:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-06 13:54:55,349 INFO L87 Difference]: Start difference. First operand 1098 states and 2154 transitions. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:54:57,707 INFO L93 Difference]: Finished difference Result 1928 states and 3814 transitions. [2021-08-06 13:54:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-08-06 13:54:57,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-06 13:54:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:54:57,714 INFO L225 Difference]: With dead ends: 1928 [2021-08-06 13:54:57,715 INFO L226 Difference]: Without dead ends: 1928 [2021-08-06 13:54:57,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11147 ImplicationChecksByTransitivity, 2105.7ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-08-06 13:54:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-06 13:54:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1562. [2021-08-06 13:54:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 1.974375400384369) internal successors, (3082), 1561 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 3082 transitions. [2021-08-06 13:54:57,771 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 3082 transitions. Word has length 105 [2021-08-06 13:54:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:54:57,771 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 3082 transitions. [2021-08-06 13:54:57,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:54:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 3082 transitions. [2021-08-06 13:54:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-06 13:54:57,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:54:57,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:54:57,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 13:54:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:57,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:54:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:54:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash -749011000, now seen corresponding path program 6 times [2021-08-06 13:54:57,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:54:57,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289739675] [2021-08-06 13:54:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:54:57,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:54:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:54:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-06 13:54:58,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:54:58,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289739675] [2021-08-06 13:54:58,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289739675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:58,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284083086] [2021-08-06 13:54:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 13:54:58,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:54:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:54:58,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:54:58,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 13:54:58,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 13:54:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:54:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 13:54:58,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:54:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-06 13:54:58,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284083086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:54:58,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:54:58,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 13:54:58,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486809797] [2021-08-06 13:54:58,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 13:54:58,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:54:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 13:54:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 13:54:58,996 INFO L87 Difference]: Start difference. First operand 1562 states and 3082 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:04,133 INFO L93 Difference]: Finished difference Result 2526 states and 5010 transitions. [2021-08-06 13:55:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-08-06 13:55:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 0 states have call successors, (0), 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 [2021-08-06 13:55:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:04,140 INFO L225 Difference]: With dead ends: 2526 [2021-08-06 13:55:04,140 INFO L226 Difference]: Without dead ends: 2526 [2021-08-06 13:55:04,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27703 ImplicationChecksByTransitivity, 4714.5ms TimeCoverageRelationStatistics Valid=12186, Invalid=49070, Unknown=0, NotChecked=0, Total=61256 [2021-08-06 13:55:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-08-06 13:55:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2106. [2021-08-06 13:55:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 1.9809976247030878) internal successors, (4170), 2105 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 4170 transitions. [2021-08-06 13:55:04,179 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 4170 transitions. Word has length 118 [2021-08-06 13:55:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:04,180 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 4170 transitions. [2021-08-06 13:55:04,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 4170 transitions. [2021-08-06 13:55:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-06 13:55:04,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:04,184 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:04,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-06 13:55:04,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:04,401 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash -151483917, now seen corresponding path program 7 times [2021-08-06 13:55:04,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:04,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325544558] [2021-08-06 13:55:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:04,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-06 13:55:04,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:04,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325544558] [2021-08-06 13:55:04,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325544558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:04,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509585132] [2021-08-06 13:55:04,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 13:55:04,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:04,546 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:04,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 13:55:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:04,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 13:55:04,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-06 13:55:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509585132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:05,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:05,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 13:55:05,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467036332] [2021-08-06 13:55:05,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 13:55:05,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 13:55:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 13:55:05,362 INFO L87 Difference]: Start difference. First operand 2106 states and 4170 transitions. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:05,497 INFO L93 Difference]: Finished difference Result 2490 states and 4938 transitions. [2021-08-06 13:55:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 13:55:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-08-06 13:55:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:05,504 INFO L225 Difference]: With dead ends: 2490 [2021-08-06 13:55:05,505 INFO L226 Difference]: Without dead ends: 2490 [2021-08-06 13:55:05,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-08-06 13:55:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-08-06 13:55:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2346. [2021-08-06 13:55:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 1.9829424307036247) internal successors, (4650), 2345 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 4650 transitions. [2021-08-06 13:55:05,537 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 4650 transitions. Word has length 131 [2021-08-06 13:55:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:05,537 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 4650 transitions. [2021-08-06 13:55:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 4650 transitions. [2021-08-06 13:55:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-06 13:55:05,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:05,541 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:05,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:05,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 13:55:05,759 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:05,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:05,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2121465763, now seen corresponding path program 8 times [2021-08-06 13:55:05,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:05,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267349232] [2021-08-06 13:55:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:05,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-06 13:55:05,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:05,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267349232] [2021-08-06 13:55:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267349232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:05,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636242217] [2021-08-06 13:55:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 13:55:05,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:05,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:06,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 13:55:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 13:55:06,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:55:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 13:55:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-06 13:55:06,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636242217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:06,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:06,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-06 13:55:06,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76973752] [2021-08-06 13:55:06,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 13:55:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 13:55:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-06 13:55:06,953 INFO L87 Difference]: Start difference. First operand 2346 states and 4650 transitions. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:07,117 INFO L93 Difference]: Finished difference Result 2730 states and 5418 transitions. [2021-08-06 13:55:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 13:55:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-08-06 13:55:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:07,125 INFO L225 Difference]: With dead ends: 2730 [2021-08-06 13:55:07,125 INFO L226 Difference]: Without dead ends: 2730 [2021-08-06 13:55:07,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 13:55:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-08-06 13:55:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2586. [2021-08-06 13:55:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 1.9845261121856868) internal successors, (5130), 2585 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5130 transitions. [2021-08-06 13:55:07,159 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5130 transitions. Word has length 136 [2021-08-06 13:55:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:07,160 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 5130 transitions. [2021-08-06 13:55:07,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5130 transitions. [2021-08-06 13:55:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-06 13:55:07,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:07,164 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:07,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:07,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:07,382 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1720621043, now seen corresponding path program 9 times [2021-08-06 13:55:07,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:07,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582637212] [2021-08-06 13:55:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:07,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-06 13:55:07,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:07,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582637212] [2021-08-06 13:55:07,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582637212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:07,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134343780] [2021-08-06 13:55:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 13:55:07,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:07,549 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:07,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 13:55:07,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 13:55:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:55:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 13:55:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-08-06 13:55:08,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134343780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:08,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:08,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2021-08-06 13:55:08,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846814339] [2021-08-06 13:55:08,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 13:55:08,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 13:55:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-08-06 13:55:08,632 INFO L87 Difference]: Start difference. First operand 2586 states and 5130 transitions. Second operand has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:22,904 INFO L93 Difference]: Finished difference Result 3824 states and 7606 transitions. [2021-08-06 13:55:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2021-08-06 13:55:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 states have internal predecessors, (161), 0 states have call successors, (0), 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 141 [2021-08-06 13:55:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:22,913 INFO L225 Difference]: With dead ends: 3824 [2021-08-06 13:55:22,913 INFO L226 Difference]: Without dead ends: 3824 [2021-08-06 13:55:22,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99095 ImplicationChecksByTransitivity, 13416.2ms TimeCoverageRelationStatistics Valid=38804, Invalid=168676, Unknown=0, NotChecked=0, Total=207480 [2021-08-06 13:55:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-08-06 13:55:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3290. [2021-08-06 13:55:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.987838248707814) internal successors, (6538), 3289 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6538 transitions. [2021-08-06 13:55:22,962 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6538 transitions. Word has length 141 [2021-08-06 13:55:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:22,963 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 6538 transitions. [2021-08-06 13:55:22,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6538 transitions. [2021-08-06 13:55:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-06 13:55:22,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:22,968 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:22,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:23,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 13:55:23,187 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash -427920258, now seen corresponding path program 10 times [2021-08-06 13:55:23,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:23,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559857029] [2021-08-06 13:55:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:23,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-06 13:55:23,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:23,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559857029] [2021-08-06 13:55:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559857029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:23,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821869480] [2021-08-06 13:55:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 13:55:23,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:23,385 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:23,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 13:55:23,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 13:55:23,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:55:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 13:55:23,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-06 13:55:24,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821869480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:24,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:24,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-06 13:55:24,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804526023] [2021-08-06 13:55:24,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 13:55:24,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 13:55:24,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-08-06 13:55:24,498 INFO L87 Difference]: Start difference. First operand 3290 states and 6538 transitions. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:24,752 INFO L93 Difference]: Finished difference Result 3738 states and 7434 transitions. [2021-08-06 13:55:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 13:55:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-08-06 13:55:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:24,768 INFO L225 Difference]: With dead ends: 3738 [2021-08-06 13:55:24,768 INFO L226 Difference]: Without dead ends: 3738 [2021-08-06 13:55:24,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 13:55:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-08-06 13:55:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3570. [2021-08-06 13:55:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3570 states, 3569 states have (on average 1.988792378817596) internal successors, (7098), 3569 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 7098 transitions. [2021-08-06 13:55:24,810 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 7098 transitions. Word has length 154 [2021-08-06 13:55:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:24,810 INFO L470 AbstractCegarLoop]: Abstraction has 3570 states and 7098 transitions. [2021-08-06 13:55:24,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 7098 transitions. [2021-08-06 13:55:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-06 13:55:24,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:24,815 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:25,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 13:55:25,045 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1927112498, now seen corresponding path program 11 times [2021-08-06 13:55:25,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:25,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438877621] [2021-08-06 13:55:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:25,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-06 13:55:25,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:25,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438877621] [2021-08-06 13:55:25,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438877621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:25,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290386409] [2021-08-06 13:55:25,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 13:55:25,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:25,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:25,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 13:55:25,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 13:55:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:55:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 13:55:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-06 13:55:26,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290386409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:26,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:26,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 36 [2021-08-06 13:55:26,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867827508] [2021-08-06 13:55:26,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 13:55:26,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 13:55:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 13:55:26,592 INFO L87 Difference]: Start difference. First operand 3570 states and 7098 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:55,095 INFO L93 Difference]: Finished difference Result 5012 states and 9982 transitions. [2021-08-06 13:55:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2021-08-06 13:55:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 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 159 [2021-08-06 13:55:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:55,101 INFO L225 Difference]: With dead ends: 5012 [2021-08-06 13:55:55,101 INFO L226 Difference]: Without dead ends: 5012 [2021-08-06 13:55:55,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1423 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 655 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210854 ImplicationChecksByTransitivity, 27192.1ms TimeCoverageRelationStatistics Valid=78108, Invalid=352884, Unknown=0, NotChecked=0, Total=430992 [2021-08-06 13:55:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-08-06 13:55:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4394. [2021-08-06 13:55:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4393 states have (on average 1.9908946050534941) internal successors, (8746), 4393 states have internal predecessors, (8746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 8746 transitions. [2021-08-06 13:55:55,166 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 8746 transitions. Word has length 159 [2021-08-06 13:55:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:55,166 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 8746 transitions. [2021-08-06 13:55:55,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 8746 transitions. [2021-08-06 13:55:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-06 13:55:55,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:55,224 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:55,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:55,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 13:55:55,435 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:55,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2019057241, now seen corresponding path program 12 times [2021-08-06 13:55:55,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:55,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743783006] [2021-08-06 13:55:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:55,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:55:55,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:55,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743783006] [2021-08-06 13:55:55,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743783006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:55,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865292535] [2021-08-06 13:55:55,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 13:55:55,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:55,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:55,688 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:55,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 13:55:56,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 13:55:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:55:56,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 13:55:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:55:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865292535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:56,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:56,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-06 13:55:56,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362860662] [2021-08-06 13:55:56,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 13:55:56,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 13:55:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-08-06 13:55:56,902 INFO L87 Difference]: Start difference. First operand 4394 states and 8746 transitions. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:57,236 INFO L93 Difference]: Finished difference Result 4906 states and 9770 transitions. [2021-08-06 13:55:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 13:55:57,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 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 [2021-08-06 13:55:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:57,244 INFO L225 Difference]: With dead ends: 4906 [2021-08-06 13:55:57,244 INFO L226 Difference]: Without dead ends: 4906 [2021-08-06 13:55:57,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 13:55:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-08-06 13:55:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 4714. [2021-08-06 13:55:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 1.991512836834288) internal successors, (9386), 4713 states have internal predecessors, (9386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 9386 transitions. [2021-08-06 13:55:57,297 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 9386 transitions. Word has length 172 [2021-08-06 13:55:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:57,297 INFO L470 AbstractCegarLoop]: Abstraction has 4714 states and 9386 transitions. [2021-08-06 13:55:57,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 9386 transitions. [2021-08-06 13:55:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-08-06 13:55:57,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:57,303 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:57,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:57,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 13:55:57,516 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2029653673, now seen corresponding path program 13 times [2021-08-06 13:55:57,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:57,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700750634] [2021-08-06 13:55:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:57,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:55:57,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:55:57,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700750634] [2021-08-06 13:55:57,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700750634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:57,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468270376] [2021-08-06 13:55:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 13:55:57,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:55:57,798 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:55:57,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 13:55:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:55:58,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 13:55:58,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:55:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:55:59,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468270376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:55:59,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:55:59,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-08-06 13:55:59,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488530956] [2021-08-06 13:55:59,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 13:55:59,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:55:59,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 13:55:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-08-06 13:55:59,134 INFO L87 Difference]: Start difference. First operand 4714 states and 9386 transitions. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:55:59,517 INFO L93 Difference]: Finished difference Result 5226 states and 10410 transitions. [2021-08-06 13:55:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 13:55:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-08-06 13:55:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:55:59,525 INFO L225 Difference]: With dead ends: 5226 [2021-08-06 13:55:59,525 INFO L226 Difference]: Without dead ends: 5226 [2021-08-06 13:55:59,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 13:55:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-08-06 13:55:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5034. [2021-08-06 13:55:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 1.9920524538048878) internal successors, (10026), 5033 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 10026 transitions. [2021-08-06 13:55:59,579 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 10026 transitions. Word has length 177 [2021-08-06 13:55:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:55:59,579 INFO L470 AbstractCegarLoop]: Abstraction has 5034 states and 10026 transitions. [2021-08-06 13:55:59,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:55:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 10026 transitions. [2021-08-06 13:55:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-08-06 13:55:59,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:55:59,586 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:55:59,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 13:55:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:55:59,804 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:55:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:55:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1838542759, now seen corresponding path program 14 times [2021-08-06 13:55:59,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:55:59,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165686796] [2021-08-06 13:55:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:55:59,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:55:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:56:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:56:00,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:56:00,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165686796] [2021-08-06 13:56:00,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165686796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:56:00,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826673630] [2021-08-06 13:56:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 13:56:00,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:56:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:56:00,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:56:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 13:56:00,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 13:56:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:56:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 13:56:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:56:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:56:01,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826673630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:56:01,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:56:01,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-08-06 13:56:01,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485265646] [2021-08-06 13:56:01,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 13:56:01,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:56:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 13:56:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-06 13:56:01,536 INFO L87 Difference]: Start difference. First operand 5034 states and 10026 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:56:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:56:01,963 INFO L93 Difference]: Finished difference Result 5546 states and 11050 transitions. [2021-08-06 13:56:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 13:56:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-08-06 13:56:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:56:01,970 INFO L225 Difference]: With dead ends: 5546 [2021-08-06 13:56:01,970 INFO L226 Difference]: Without dead ends: 5546 [2021-08-06 13:56:01,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 13:56:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-08-06 13:56:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5354. [2021-08-06 13:56:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 1.9925275546422567) internal successors, (10666), 5353 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:56:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 10666 transitions. [2021-08-06 13:56:02,023 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 10666 transitions. Word has length 182 [2021-08-06 13:56:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:56:02,023 INFO L470 AbstractCegarLoop]: Abstraction has 5354 states and 10666 transitions. [2021-08-06 13:56:02,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:56:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 10666 transitions. [2021-08-06 13:56:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-06 13:56:02,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:56:02,030 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:56:02,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 13:56:02,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 13:56:02,261 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:56:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:56:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1071145815, now seen corresponding path program 15 times [2021-08-06 13:56:02,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:56:02,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780910848] [2021-08-06 13:56:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:56:02,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:56:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:56:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-06 13:56:02,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:56:02,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780910848] [2021-08-06 13:56:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780910848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:56:02,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284995112] [2021-08-06 13:56:02,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 13:56:02,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:56:02,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:56:02,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:56:02,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 13:56:03,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 13:56:03,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:56:03,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 13:56:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:56:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-08-06 13:56:04,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284995112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:56:04,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:56:04,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2021-08-06 13:56:04,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695387283] [2021-08-06 13:56:04,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 13:56:04,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:56:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 13:56:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 13:56:04,326 INFO L87 Difference]: Start difference. First operand 5354 states and 10666 transitions. Second operand has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:57:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:57:09,253 INFO L93 Difference]: Finished difference Result 7140 states and 14238 transitions. [2021-08-06 13:57:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2021-08-06 13:57:09,253 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-08-06 13:57:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:57:09,263 INFO L225 Difference]: With dead ends: 7140 [2021-08-06 13:57:09,263 INFO L226 Difference]: Without dead ends: 7140 [2021-08-06 13:57:09,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2193 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 1032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534325 ImplicationChecksByTransitivity, 61890.4ms TimeCoverageRelationStatistics Valid=187686, Invalid=880436, Unknown=0, NotChecked=0, Total=1068122 [2021-08-06 13:57:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-08-06 13:57:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 6378. [2021-08-06 13:57:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6377 states have (on average 1.9937274580523758) internal successors, (12714), 6377 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:57:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 12714 transitions. [2021-08-06 13:57:09,640 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 12714 transitions. Word has length 187 [2021-08-06 13:57:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:57:09,641 INFO L470 AbstractCegarLoop]: Abstraction has 6378 states and 12714 transitions. [2021-08-06 13:57:09,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:57:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 12714 transitions. [2021-08-06 13:57:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-08-06 13:57:09,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:57:09,661 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:57:09,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 13:57:09,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 13:57:09,880 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:57:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:57:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash 497348404, now seen corresponding path program 16 times [2021-08-06 13:57:09,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:57:09,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177583742] [2021-08-06 13:57:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:57:09,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:57:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:57:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-06 13:57:10,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:57:10,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177583742] [2021-08-06 13:57:10,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177583742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:57:10,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056668350] [2021-08-06 13:57:10,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 13:57:10,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:57:10,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:57:10,308 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:57:10,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 13:57:11,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 13:57:11,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:57:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 13:57:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:57:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-06 13:57:11,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056668350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:57:11,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:57:11,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-08-06 13:57:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553885350] [2021-08-06 13:57:11,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 13:57:11,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:57:11,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 13:57:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 13:57:11,852 INFO L87 Difference]: Start difference. First operand 6378 states and 12714 transitions. Second operand has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:57:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:57:12,569 INFO L93 Difference]: Finished difference Result 6954 states and 13866 transitions. [2021-08-06 13:57:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 13:57:12,570 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-08-06 13:57:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:57:12,577 INFO L225 Difference]: With dead ends: 6954 [2021-08-06 13:57:12,577 INFO L226 Difference]: Without dead ends: 6954 [2021-08-06 13:57:12,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 721.8ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 13:57:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-08-06 13:57:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 6738. [2021-08-06 13:57:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.9940626391568947) internal successors, (13434), 6737 states have internal predecessors, (13434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:57:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 13434 transitions. [2021-08-06 13:57:12,648 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 13434 transitions. Word has length 200 [2021-08-06 13:57:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:57:12,648 INFO L470 AbstractCegarLoop]: Abstraction has 6738 states and 13434 transitions. [2021-08-06 13:57:12,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:57:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 13434 transitions. [2021-08-06 13:57:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-08-06 13:57:12,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:57:12,657 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:57:12,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-06 13:57:12,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:57:12,870 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:57:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:57:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1462368380, now seen corresponding path program 17 times [2021-08-06 13:57:12,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:57:12,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266168177] [2021-08-06 13:57:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:57:12,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:57:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:57:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-06 13:57:13,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:57:13,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266168177] [2021-08-06 13:57:13,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266168177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:57:13,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991751756] [2021-08-06 13:57:13,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 13:57:13,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:57:13,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:57:13,342 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:57:13,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 13:57:14,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-06 13:57:14,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:57:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 13:57:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:57:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-08-06 13:57:15,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991751756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:57:15,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:57:15,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 52 [2021-08-06 13:57:15,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225462043] [2021-08-06 13:57:15,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-06 13:57:15,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:57:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-06 13:57:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 13:57:15,404 INFO L87 Difference]: Start difference. First operand 6738 states and 13434 transitions. Second operand has 52 states, 52 states have (on average 4.326923076923077) internal successors, (225), 52 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:58:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:58:58,713 INFO L93 Difference]: Finished difference Result 8728 states and 17414 transitions. [2021-08-06 13:58:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1301 states. [2021-08-06 13:58:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.326923076923077) internal successors, (225), 52 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-08-06 13:58:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:58:58,722 INFO L225 Difference]: With dead ends: 8728 [2021-08-06 13:58:58,722 INFO L226 Difference]: Without dead ends: 8728 [2021-08-06 13:58:58,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2785 GetRequests, 1462 SyntacticMatches, 0 SemanticMatches, 1323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886582 ImplicationChecksByTransitivity, 98509.7ms TimeCoverageRelationStatistics Valid=303321, Invalid=1450979, Unknown=0, NotChecked=0, Total=1754300 [2021-08-06 13:58:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-08-06 13:58:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 7882. [2021-08-06 13:58:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 1.9949245019667554) internal successors, (15722), 7881 states have internal predecessors, (15722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:58:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 15722 transitions. [2021-08-06 13:58:58,948 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 15722 transitions. Word has length 205 [2021-08-06 13:58:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:58:58,970 INFO L470 AbstractCegarLoop]: Abstraction has 7882 states and 15722 transitions. [2021-08-06 13:58:58,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.326923076923077) internal successors, (225), 52 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:58:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 15722 transitions. [2021-08-06 13:58:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-08-06 13:58:58,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:58:58,980 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:58:59,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 13:58:59,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:58:59,181 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:58:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:58:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1149518607, now seen corresponding path program 18 times [2021-08-06 13:58:59,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:58:59,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660049448] [2021-08-06 13:58:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:58:59,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:58:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:58:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-06 13:58:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:58:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660049448] [2021-08-06 13:58:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660049448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:58:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631404100] [2021-08-06 13:58:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 13:58:59,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:58:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:58:59,894 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:58:59,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 13:59:01,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-06 13:59:01,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:59:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 13:59:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:59:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-06 13:59:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631404100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:01,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:59:01,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-08-06 13:59:01,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361805160] [2021-08-06 13:59:01,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 13:59:01,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:59:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 13:59:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 13:59:01,876 INFO L87 Difference]: Start difference. First operand 7882 states and 15722 transitions. Second operand has 39 states, 39 states have (on average 4.076923076923077) internal successors, (159), 39 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:59:02,708 INFO L93 Difference]: Finished difference Result 8522 states and 17002 transitions. [2021-08-06 13:59:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 13:59:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.076923076923077) internal successors, (159), 39 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-08-06 13:59:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:59:02,717 INFO L225 Difference]: With dead ends: 8522 [2021-08-06 13:59:02,717 INFO L226 Difference]: Without dead ends: 8522 [2021-08-06 13:59:02,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1188.5ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 13:59:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8522 states. [2021-08-06 13:59:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8522 to 8282. [2021-08-06 13:59:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8281 states have (on average 1.9951696654993358) internal successors, (16522), 8281 states have internal predecessors, (16522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 16522 transitions. [2021-08-06 13:59:02,792 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 16522 transitions. Word has length 218 [2021-08-06 13:59:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:59:02,792 INFO L470 AbstractCegarLoop]: Abstraction has 8282 states and 16522 transitions. [2021-08-06 13:59:02,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.076923076923077) internal successors, (159), 39 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 16522 transitions. [2021-08-06 13:59:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-08-06 13:59:02,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:59:02,801 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:59:02,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 13:59:03,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:59:03,019 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:59:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:59:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash 64874335, now seen corresponding path program 19 times [2021-08-06 13:59:03,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:59:03,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410934205] [2021-08-06 13:59:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:59:03,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:59:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:59:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-06 13:59:03,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:59:03,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410934205] [2021-08-06 13:59:03,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410934205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:03,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465695791] [2021-08-06 13:59:03,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 13:59:03,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:59:03,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:59:03,589 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:59:03,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 13:59:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:59:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 13:59:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:59:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-06 13:59:05,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465695791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:05,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:59:05,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-08-06 13:59:05,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959638553] [2021-08-06 13:59:05,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 13:59:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:59:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 13:59:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 13:59:05,556 INFO L87 Difference]: Start difference. First operand 8282 states and 16522 transitions. Second operand has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:59:06,438 INFO L93 Difference]: Finished difference Result 8922 states and 17802 transitions. [2021-08-06 13:59:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 13:59:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-08-06 13:59:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:59:06,447 INFO L225 Difference]: With dead ends: 8922 [2021-08-06 13:59:06,447 INFO L226 Difference]: Without dead ends: 8922 [2021-08-06 13:59:06,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1120.3ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 13:59:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8922 states. [2021-08-06 13:59:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8922 to 8682. [2021-08-06 13:59:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 8681 states have (on average 1.9953922359175211) internal successors, (17322), 8681 states have internal predecessors, (17322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 17322 transitions. [2021-08-06 13:59:06,544 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 17322 transitions. Word has length 223 [2021-08-06 13:59:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:59:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 8682 states and 17322 transitions. [2021-08-06 13:59:06,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 17322 transitions. [2021-08-06 13:59:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-08-06 13:59:06,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:59:06,554 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:59:06,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 13:59:06,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 13:59:06,774 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:59:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:59:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1466856719, now seen corresponding path program 20 times [2021-08-06 13:59:06,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:59:06,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136973138] [2021-08-06 13:59:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:59:06,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:59:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:59:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-06 13:59:07,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:59:07,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136973138] [2021-08-06 13:59:07,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136973138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:07,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793986176] [2021-08-06 13:59:07,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 13:59:07,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:59:07,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:59:07,424 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:59:07,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 13:59:08,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 13:59:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:59:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 13:59:08,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:59:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-06 13:59:09,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793986176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:09,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:59:09,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-08-06 13:59:09,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861827023] [2021-08-06 13:59:09,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 13:59:09,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:59:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 13:59:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 13:59:09,459 INFO L87 Difference]: Start difference. First operand 8682 states and 17322 transitions. Second operand has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:59:10,331 INFO L93 Difference]: Finished difference Result 9082 states and 18122 transitions. [2021-08-06 13:59:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 13:59:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-08-06 13:59:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:59:10,340 INFO L225 Difference]: With dead ends: 9082 [2021-08-06 13:59:10,341 INFO L226 Difference]: Without dead ends: 9082 [2021-08-06 13:59:10,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1080.0ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 13:59:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9082 states. [2021-08-06 13:59:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9082 to 9082. [2021-08-06 13:59:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9082 states, 9081 states have (on average 1.9955951987666556) internal successors, (18122), 9081 states have internal predecessors, (18122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9082 states to 9082 states and 18122 transitions. [2021-08-06 13:59:10,428 INFO L78 Accepts]: Start accepts. Automaton has 9082 states and 18122 transitions. Word has length 228 [2021-08-06 13:59:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:59:10,429 INFO L470 AbstractCegarLoop]: Abstraction has 9082 states and 18122 transitions. [2021-08-06 13:59:10,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states and 18122 transitions. [2021-08-06 13:59:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-08-06 13:59:10,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:59:10,438 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:59:10,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 13:59:10,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 13:59:10,660 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:59:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:59:10,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2055015073, now seen corresponding path program 21 times [2021-08-06 13:59:10,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:59:10,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681664983] [2021-08-06 13:59:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:59:10,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:59:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:59:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 0 proven. 1267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:59:11,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:59:11,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681664983] [2021-08-06 13:59:11,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681664983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:11,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129572095] [2021-08-06 13:59:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 13:59:11,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:59:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:59:11,474 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:59:11,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 13:59:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 13:59:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:59:12,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 13:59:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:59:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-06 13:59:13,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129572095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:13,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:59:13,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 21] total 63 [2021-08-06 13:59:13,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195718532] [2021-08-06 13:59:13,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-06 13:59:13,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:59:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-06 13:59:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=3222, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 13:59:13,901 INFO L87 Difference]: Start difference. First operand 9082 states and 18122 transitions. Second operand has 63 states, 63 states have (on average 5.603174603174603) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:59:52,620 INFO L93 Difference]: Finished difference Result 134316 states and 268590 transitions. [2021-08-06 13:59:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 879 states. [2021-08-06 13:59:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.603174603174603) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 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 233 [2021-08-06 13:59:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:59:53,007 INFO L225 Difference]: With dead ends: 134316 [2021-08-06 13:59:53,007 INFO L226 Difference]: Without dead ends: 134316 [2021-08-06 13:59:53,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1948 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 898 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417630 ImplicationChecksByTransitivity, 32238.1ms TimeCoverageRelationStatistics Valid=162507, Invalid=646593, Unknown=0, NotChecked=0, Total=809100 [2021-08-06 13:59:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134316 states. [2021-08-06 13:59:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134316 to 9986. [2021-08-06 13:59:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.9959939909864797) internal successors, (19930), 9985 states have internal predecessors, (19930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 19930 transitions. [2021-08-06 13:59:54,045 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 19930 transitions. Word has length 233 [2021-08-06 13:59:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:59:54,047 INFO L470 AbstractCegarLoop]: Abstraction has 9986 states and 19930 transitions. [2021-08-06 13:59:54,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.603174603174603) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:59:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 19930 transitions. [2021-08-06 13:59:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-08-06 13:59:54,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:59:54,058 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:59:54,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 13:59:54,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:59:54,273 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:59:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:59:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1713750982, now seen corresponding path program 22 times [2021-08-06 13:59:54,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:59:54,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500712358] [2021-08-06 13:59:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:59:54,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:59:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:59:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 1340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:59:55,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:59:55,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500712358] [2021-08-06 13:59:55,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500712358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:55,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456066383] [2021-08-06 13:59:55,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 13:59:55,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 13:59:55,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:59:55,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 13:59:55,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 13:59:56,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 13:59:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 13:59:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 13:59:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 13:59:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-06 13:59:57,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456066383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 13:59:57,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 13:59:57,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-08-06 13:59:57,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015120932] [2021-08-06 13:59:57,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-06 13:59:57,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:59:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-06 13:59:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 13:59:57,792 INFO L87 Difference]: Start difference. First operand 9986 states and 19930 transitions. Second operand has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:00:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:00:54,984 INFO L93 Difference]: Finished difference Result 170472 states and 340902 transitions. [2021-08-06 14:00:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1102 states. [2021-08-06 14:00:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-08-06 14:00:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:00:55,631 INFO L225 Difference]: With dead ends: 170472 [2021-08-06 14:00:55,631 INFO L226 Difference]: Without dead ends: 170472 [2021-08-06 14:00:55,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2400 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 1123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673844 ImplicationChecksByTransitivity, 45528.2ms TimeCoverageRelationStatistics Valid=255553, Invalid=1008947, Unknown=0, NotChecked=0, Total=1264500 [2021-08-06 14:00:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170472 states. [2021-08-06 14:00:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170472 to 10890. [2021-08-06 14:00:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10890 states, 10889 states have (on average 1.9963265680962439) internal successors, (21738), 10889 states have internal predecessors, (21738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:00:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10890 states to 10890 states and 21738 transitions. [2021-08-06 14:00:57,140 INFO L78 Accepts]: Start accepts. Automaton has 10890 states and 21738 transitions. Word has length 241 [2021-08-06 14:00:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:00:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 10890 states and 21738 transitions. [2021-08-06 14:00:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:00:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 10890 states and 21738 transitions. [2021-08-06 14:00:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-08-06 14:00:57,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:00:57,152 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:00:57,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:00:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:00:57,365 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 14:00:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:00:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -199854059, now seen corresponding path program 23 times [2021-08-06 14:00:57,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:00:57,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210343789] [2021-08-06 14:00:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:00:57,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:00:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:00:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 1421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:00:58,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:00:58,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210343789] [2021-08-06 14:00:58,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210343789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:00:58,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788417785] [2021-08-06 14:00:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:00:58,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:00:58,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:00:58,649 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:00:58,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:01:00,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-06 14:01:00,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:01:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:01:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:01:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-06 14:01:01,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788417785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:01:01,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:01:01,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2021-08-06 14:01:01,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359345995] [2021-08-06 14:01:01,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-06 14:01:01,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:01:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-06 14:01:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=4148, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 14:01:01,533 INFO L87 Difference]: Start difference. First operand 10890 states and 21738 transitions. Second operand has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:02:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:02:27,746 INFO L93 Difference]: Finished difference Result 211585 states and 423128 transitions. [2021-08-06 14:02:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1363 states. [2021-08-06 14:02:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-08-06 14:02:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:02:28,226 INFO L225 Difference]: With dead ends: 211585 [2021-08-06 14:02:28,227 INFO L226 Difference]: Without dead ends: 211585 [2021-08-06 14:02:28,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2928 GetRequests, 1542 SyntacticMatches, 0 SemanticMatches, 1386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053353 ImplicationChecksByTransitivity, 66025.6ms TimeCoverageRelationStatistics Valid=390931, Invalid=1534225, Unknown=0, NotChecked=0, Total=1925156 [2021-08-06 14:02:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211585 states. [2021-08-06 14:02:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211585 to 11794. [2021-08-06 14:02:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11793 states have (on average 1.9966081573814976) internal successors, (23546), 11793 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:02:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 23546 transitions. [2021-08-06 14:02:30,334 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 23546 transitions. Word has length 249 [2021-08-06 14:02:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:02:30,334 INFO L470 AbstractCegarLoop]: Abstraction has 11794 states and 23546 transitions. [2021-08-06 14:02:30,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:02:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 23546 transitions. [2021-08-06 14:02:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-08-06 14:02:30,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:02:30,346 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:02:30,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:02:30,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 14:02:30,562 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 14:02:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:02:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -294475536, now seen corresponding path program 24 times [2021-08-06 14:02:30,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:02:30,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090892308] [2021-08-06 14:02:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:02:30,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:02:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:02:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:02:31,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:02:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090892308] [2021-08-06 14:02:31,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090892308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:02:31,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248614846] [2021-08-06 14:02:31,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:02:31,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:02:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:02:31,464 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:02:31,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:02:33,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-06 14:02:33,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:02:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 14:02:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:02:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-06 14:02:34,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248614846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:02:34,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:02:34,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-08-06 14:02:34,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209036248] [2021-08-06 14:02:34,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-06 14:02:34,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:02:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-06 14:02:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4653, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 14:02:34,695 INFO L87 Difference]: Start difference. First operand 11794 states and 23546 transitions. Second operand has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)