/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread-ext/15_dekker.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 15:49:08,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 15:49:08,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 15:49:08,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 15:49:08,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 15:49:08,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 15:49:08,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 15:49:08,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 15:49:08,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 15:49:08,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 15:49:08,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 15:49:08,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 15:49:08,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 15:49:08,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 15:49:08,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 15:49:08,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 15:49:08,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 15:49:08,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 15:49:08,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 15:49:08,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 15:49:08,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 15:49:08,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 15:49:08,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 15:49:08,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 15:49:08,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 15:49:08,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 15:49:08,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 15:49:08,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 15:49:08,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 15:49:08,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 15:49:08,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 15:49:08,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 15:49:08,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 15:49:08,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 15:49:08,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 15:49:08,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 15:49:08,309 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 [2020-11-11 15:49:08,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 15:49:08,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 15:49:08,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 15:49:08,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 15:49:08,367 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 15:49:08,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 15:49:08,368 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 15:49:08,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 15:49:08,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 15:49:08,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 15:49:08,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 15:49:08,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 15:49:08,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 15:49:08,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 15:49:08,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 15:49:08,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 15:49:08,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 15:49:08,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 15:49:08,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 15:49:08,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 15:49:08,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 15:49:08,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:49:08,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 15:49:08,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 15:49:08,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 15:49:08,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 15:49:08,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 15:49:08,373 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 15:49:08,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 15:49:08,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 15:49:08,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 15:49:08,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 15:49:08,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 15:49:08,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 15:49:08,863 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 15:49:08,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/15_dekker.i [2020-11-11 15:49:08,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ee802d0/ea90d2f7d6a04b6588582c7b31fa8713/FLAG9771d27e6 [2020-11-11 15:49:09,649 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 15:49:09,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/15_dekker.i [2020-11-11 15:49:09,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ee802d0/ea90d2f7d6a04b6588582c7b31fa8713/FLAG9771d27e6 [2020-11-11 15:49:09,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ee802d0/ea90d2f7d6a04b6588582c7b31fa8713 [2020-11-11 15:49:09,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 15:49:09,961 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 15:49:09,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 15:49:09,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 15:49:09,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 15:49:09,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:49:09" (1/1) ... [2020-11-11 15:49:09,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3f5c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:09, skipping insertion in model container [2020-11-11 15:49:09,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:49:09" (1/1) ... [2020-11-11 15:49:09,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 15:49:10,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 15:49:10,249 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-11 15:49:10,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:49:10,512 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 15:49:10,541 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-11 15:49:10,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:49:10,677 INFO L208 MainTranslator]: Completed translation [2020-11-11 15:49:10,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10 WrapperNode [2020-11-11 15:49:10,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 15:49:10,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 15:49:10,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 15:49:10,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 15:49:10,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 15:49:10,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 15:49:10,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 15:49:10,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 15:49:10,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2020-11-11 15:49:10,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 15:49:10,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 15:49:10,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 15:49:10,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 15:49:10,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:49:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-11-11 15:49:10,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-11-11 15:49:10,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 15:49:10,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 15:49:10,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 15:49:10,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 15:49:10,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 15:49:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 15:49:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 15:49:10,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 15:49:10,878 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 15:49:11,342 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 15:49:11,343 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-11 15:49:11,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:49:11 BoogieIcfgContainer [2020-11-11 15:49:11,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 15:49:11,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 15:49:11,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 15:49:11,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 15:49:11,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:49:09" (1/3) ... [2020-11-11 15:49:11,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f211003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:49:11, skipping insertion in model container [2020-11-11 15:49:11,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (2/3) ... [2020-11-11 15:49:11,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f211003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:49:11, skipping insertion in model container [2020-11-11 15:49:11,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:49:11" (3/3) ... [2020-11-11 15:49:11,354 INFO L111 eAbstractionObserver]: Analyzing ICFG 15_dekker.i [2020-11-11 15:49:11,371 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 15:49:11,372 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 15:49:11,376 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-11 15:49:11,377 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 15:49:11,409 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,410 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,410 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,410 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,410 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,411 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,411 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,411 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,411 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,412 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,412 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,412 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,412 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,412 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,413 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,413 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,413 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,414 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,414 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,414 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,414 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,414 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,415 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,415 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,415 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,416 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,416 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,416 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,417 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,417 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,417 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,417 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,417 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,418 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,418 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,418 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,418 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,418 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,421 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,422 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,422 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,422 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,422 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,422 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,423 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,423 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:49:11,431 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 15:49:11,445 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-11 15:49:11,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 15:49:11,470 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 15:49:11,470 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 15:49:11,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 15:49:11,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 15:49:11,471 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 15:49:11,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 15:49:11,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 15:49:11,483 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 85 transitions, 175 flow [2020-11-11 15:49:11,548 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 775 states, 771 states have (on average 2.425421530479896) internal successors, (1870), 774 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 775 states, 771 states have (on average 2.425421530479896) internal successors, (1870), 774 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-11 15:49:11,576 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:11,577 INFO L494 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] [2020-11-11 15:49:11,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2031516002, now seen corresponding path program 1 times [2020-11-11 15:49:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:11,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624504028] [2020-11-11 15:49:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624504028] [2020-11-11 15:49:11,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:11,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 15:49:11,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340560690] [2020-11-11 15:49:11,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-11 15:49:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-11 15:49:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-11 15:49:11,904 INFO L87 Difference]: Start difference. First operand has 775 states, 771 states have (on average 2.425421530479896) internal successors, (1870), 774 states have internal predecessors, (1870), 0 states have call successors, (0), 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 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:11,944 INFO L93 Difference]: Finished difference Result 667 states and 1422 transitions. [2020-11-11 15:49:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-11 15:49:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2020-11-11 15:49:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:11,988 INFO L225 Difference]: With dead ends: 667 [2020-11-11 15:49:11,988 INFO L226 Difference]: Without dead ends: 612 [2020-11-11 15:49:11,993 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-11 15:49:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-11-11 15:49:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2020-11-11 15:49:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 609 states have (on average 2.154351395730706) internal successors, (1312), 611 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1312 transitions. [2020-11-11 15:49:12,124 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1312 transitions. Word has length 25 [2020-11-11 15:49:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:12,125 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 1312 transitions. [2020-11-11 15:49:12,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1312 transitions. [2020-11-11 15:49:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-11 15:49:12,127 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:12,127 INFO L494 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] [2020-11-11 15:49:12,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 15:49:12,128 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145153, now seen corresponding path program 1 times [2020-11-11 15:49:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:12,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394014230] [2020-11-11 15:49:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:12,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394014230] [2020-11-11 15:49:12,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:12,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 15:49:12,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501485041] [2020-11-11 15:49:12,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-11 15:49:12,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-11 15:49:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-11 15:49:12,230 INFO L87 Difference]: Start difference. First operand 612 states and 1312 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:12,276 INFO L93 Difference]: Finished difference Result 593 states and 1239 transitions. [2020-11-11 15:49:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-11 15:49:12,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2020-11-11 15:49:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:12,282 INFO L225 Difference]: With dead ends: 593 [2020-11-11 15:49:12,282 INFO L226 Difference]: Without dead ends: 461 [2020-11-11 15:49:12,283 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-11 15:49:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-11-11 15:49:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 436. [2020-11-11 15:49:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 433 states have (on average 2.1108545034642034) internal successors, (914), 435 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 914 transitions. [2020-11-11 15:49:12,329 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 914 transitions. Word has length 25 [2020-11-11 15:49:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:12,329 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 914 transitions. [2020-11-11 15:49:12,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 914 transitions. [2020-11-11 15:49:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-11 15:49:12,337 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:12,338 INFO L494 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] [2020-11-11 15:49:12,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 15:49:12,339 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -893206604, now seen corresponding path program 1 times [2020-11-11 15:49:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:12,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222848487] [2020-11-11 15:49:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222848487] [2020-11-11 15:49:12,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:12,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 15:49:12,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283389699] [2020-11-11 15:49:12,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-11 15:49:12,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-11 15:49:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-11 15:49:12,457 INFO L87 Difference]: Start difference. First operand 436 states and 914 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:12,481 INFO L93 Difference]: Finished difference Result 377 states and 777 transitions. [2020-11-11 15:49:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-11 15:49:12,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2020-11-11 15:49:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:12,484 INFO L225 Difference]: With dead ends: 377 [2020-11-11 15:49:12,485 INFO L226 Difference]: Without dead ends: 297 [2020-11-11 15:49:12,485 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-11 15:49:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-11-11 15:49:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2020-11-11 15:49:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 295 states have (on average 2.0610169491525423) internal successors, (608), 296 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 608 transitions. [2020-11-11 15:49:12,499 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 608 transitions. Word has length 29 [2020-11-11 15:49:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:12,500 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 608 transitions. [2020-11-11 15:49:12,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 608 transitions. [2020-11-11 15:49:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-11 15:49:12,502 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:12,502 INFO L494 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] [2020-11-11 15:49:12,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 15:49:12,502 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash -404367877, now seen corresponding path program 1 times [2020-11-11 15:49:12,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:12,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602023039] [2020-11-11 15:49:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:12,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602023039] [2020-11-11 15:49:12,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:12,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 15:49:12,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578664064] [2020-11-11 15:49:12,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 15:49:12,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:12,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 15:49:12,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 15:49:12,592 INFO L87 Difference]: Start difference. First operand 297 states and 608 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:12,654 INFO L93 Difference]: Finished difference Result 367 states and 782 transitions. [2020-11-11 15:49:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 15:49:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2020-11-11 15:49:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:12,661 INFO L225 Difference]: With dead ends: 367 [2020-11-11 15:49:12,661 INFO L226 Difference]: Without dead ends: 283 [2020-11-11 15:49:12,662 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 15:49:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-11-11 15:49:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2020-11-11 15:49:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 2.0462633451957295) internal successors, (575), 282 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 575 transitions. [2020-11-11 15:49:12,677 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 575 transitions. Word has length 34 [2020-11-11 15:49:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:12,677 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 575 transitions. [2020-11-11 15:49:12,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 575 transitions. [2020-11-11 15:49:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-11 15:49:12,679 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:12,679 INFO L494 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] [2020-11-11 15:49:12,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 15:49:12,680 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -995940113, now seen corresponding path program 2 times [2020-11-11 15:49:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:12,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794155240] [2020-11-11 15:49:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:12,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794155240] [2020-11-11 15:49:12,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:12,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 15:49:12,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313565267] [2020-11-11 15:49:12,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 15:49:12,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:12,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 15:49:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 15:49:12,739 INFO L87 Difference]: Start difference. First operand 283 states and 575 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:12,784 INFO L93 Difference]: Finished difference Result 353 states and 745 transitions. [2020-11-11 15:49:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 15:49:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2020-11-11 15:49:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:12,788 INFO L225 Difference]: With dead ends: 353 [2020-11-11 15:49:12,788 INFO L226 Difference]: Without dead ends: 276 [2020-11-11 15:49:12,789 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 15:49:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-11 15:49:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2020-11-11 15:49:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 274 states have (on average 2.0291970802919708) internal successors, (556), 275 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 556 transitions. [2020-11-11 15:49:12,801 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 556 transitions. Word has length 34 [2020-11-11 15:49:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:12,801 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 556 transitions. [2020-11-11 15:49:12,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 556 transitions. [2020-11-11 15:49:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:49:12,803 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:12,803 INFO L494 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] [2020-11-11 15:49:12,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 15:49:12,803 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -559544046, now seen corresponding path program 1 times [2020-11-11 15:49:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:12,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103686612] [2020-11-11 15:49:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:12,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103686612] [2020-11-11 15:49:12,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:12,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 15:49:12,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012128399] [2020-11-11 15:49:12,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 15:49:12,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 15:49:12,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 15:49:12,862 INFO L87 Difference]: Start difference. First operand 276 states and 556 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:12,899 INFO L93 Difference]: Finished difference Result 180 states and 307 transitions. [2020-11-11 15:49:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 15:49:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2020-11-11 15:49:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:12,901 INFO L225 Difference]: With dead ends: 180 [2020-11-11 15:49:12,902 INFO L226 Difference]: Without dead ends: 167 [2020-11-11 15:49:12,902 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 15:49:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-11 15:49:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-11-11 15:49:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.7212121212121212) internal successors, (284), 166 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 284 transitions. [2020-11-11 15:49:12,909 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 284 transitions. Word has length 41 [2020-11-11 15:49:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:12,909 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 284 transitions. [2020-11-11 15:49:12,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 284 transitions. [2020-11-11 15:49:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:49:12,911 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:49:12,911 INFO L494 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] [2020-11-11 15:49:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 15:49:12,912 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:49:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:49:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash -295727853, now seen corresponding path program 1 times [2020-11-11 15:49:12,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:49:12,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073884806] [2020-11-11 15:49:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:49:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:49:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:49:13,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073884806] [2020-11-11 15:49:13,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:49:13,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 15:49:13,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167863177] [2020-11-11 15:49:13,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 15:49:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:49:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 15:49:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 15:49:13,035 INFO L87 Difference]: Start difference. First operand 167 states and 284 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:49:13,057 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-11-11 15:49:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 15:49:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2020-11-11 15:49:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:49:13,059 INFO L225 Difference]: With dead ends: 33 [2020-11-11 15:49:13,059 INFO L226 Difference]: Without dead ends: 0 [2020-11-11 15:49:13,059 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 15:49:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-11 15:49:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-11 15:49:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-11 15:49:13,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-11-11 15:49:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:49:13,061 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-11 15:49:13,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:49:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-11 15:49:13,062 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-11 15:49:13,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 15:49:13,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 03:49:13 BasicIcfg [2020-11-11 15:49:13,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 15:49:13,073 INFO L168 Benchmark]: Toolchain (without parser) took 3113.55 ms. Allocated memory is still 302.0 MB. Free memory was 276.9 MB in the beginning and 151.5 MB in the end (delta: 125.4 MB). Peak memory consumption was 128.3 MB. Max. memory is 16.0 GB. [2020-11-11 15:49:13,074 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:49:13,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.90 ms. Allocated memory is still 302.0 MB. Free memory was 276.2 MB in the beginning and 246.8 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-11 15:49:13,083 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.97 ms. Allocated memory is still 302.0 MB. Free memory was 246.8 MB in the beginning and 245.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:49:13,084 INFO L168 Benchmark]: Boogie Preprocessor took 33.29 ms. Allocated memory is still 302.0 MB. Free memory was 245.0 MB in the beginning and 243.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:49:13,084 INFO L168 Benchmark]: RCFGBuilder took 579.79 ms. Allocated memory is still 302.0 MB. Free memory was 243.4 MB in the beginning and 263.7 MB in the end (delta: -20.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. [2020-11-11 15:49:13,085 INFO L168 Benchmark]: TraceAbstraction took 1721.19 ms. Allocated memory is still 302.0 MB. Free memory was 262.6 MB in the beginning and 151.5 MB in the end (delta: 111.1 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:49:13,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 713.90 ms. Allocated memory is still 302.0 MB. Free memory was 276.2 MB in the beginning and 246.8 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 51.97 ms. Allocated memory is still 302.0 MB. Free memory was 246.8 MB in the beginning and 245.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.29 ms. Allocated memory is still 302.0 MB. Free memory was 245.0 MB in the beginning and 243.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 579.79 ms. Allocated memory is still 302.0 MB. Free memory was 243.4 MB in the beginning and 263.7 MB in the end (delta: -20.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1721.19 ms. Allocated memory is still 302.0 MB. Free memory was 262.6 MB in the beginning and 151.5 MB in the end (delta: 111.1 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 72 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 554 SDtfs, 296 SDslu, 467 SDs, 0 SdLazy, 54 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=775occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 25 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 10742 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...