/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/09a-return-after-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:15:05,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:15:05,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:15:05,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:15:05,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:15:05,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:15:05,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:15:05,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:15:05,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:15:05,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:15:05,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:15:05,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:15:05,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:15:05,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:15:05,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:15:05,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:15:05,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:15:05,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:15:05,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:15:05,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:15:05,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:15:05,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:15:05,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:15:05,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:15:05,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-24 13:15:05,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-24 13:15:05,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-24 13:15:05,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-24 13:15:05,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-24 13:15:05,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-24 13:15:05,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 13:15:05,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 13:15:05,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 13:15:05,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 13:15:05,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 13:15:05,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 13:15:05,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 13:15:05,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 13:15:05,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:15:05,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:15:05,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:15:05,316 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-PN-VariableLbe.epf [2021-03-24 13:15:05,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:15:05,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:15:05,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:15:05,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:15:05,361 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:15:05,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:15:05,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:15:05,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:15:05,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:15:05,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:15:05,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:15:05,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:15:05,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:15:05,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:15:05,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:15:05,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:15:05,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:15:05,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:15:05,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:15:05,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:15:05,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:15:05,364 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:15:05,364 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:15:05,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:15:05,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:15:05,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:15:05,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:15:05,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 13:15:05,716 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 13:15:05,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/09a-return-after-end.c [2021-03-24 13:15:05,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49447f637/c53484629ac84cf98de9e6590153b410/FLAG75829535d [2021-03-24 13:15:06,381 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 13:15:06,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/09a-return-after-end.c [2021-03-24 13:15:06,382 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-24 13:15:06,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49447f637/c53484629ac84cf98de9e6590153b410/FLAG75829535d [2021-03-24 13:15:06,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49447f637/c53484629ac84cf98de9e6590153b410 [2021-03-24 13:15:06,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:15:06,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 13:15:06,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 13:15:06,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 13:15:06,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 13:15:06,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 01:15:06" (1/1) ... [2021-03-24 13:15:06,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a589347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:06, skipping insertion in model container [2021-03-24 13:15:06,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 01:15:06" (1/1) ... [2021-03-24 13:15:06,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 13:15:06,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 13:15:06,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 13:15:06,960 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 13:15:06,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 13:15:07,016 INFO L208 MainTranslator]: Completed translation [2021-03-24 13:15:07,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07 WrapperNode [2021-03-24 13:15:07,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 13:15:07,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:15:07,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:15:07,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:15:07,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:15:07,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:15:07,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:15:07,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:15:07,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... [2021-03-24 13:15:07,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:15:07,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:15:07,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:15:07,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:15:07,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:15:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 13:15:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 13:15:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 13:15:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-24 13:15:07,153 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-24 13:15:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:15:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:15:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 13:15:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 13:15:07,156 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:15:07,420 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:15:07,420 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-24 13:15:07,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:15:07 BoogieIcfgContainer [2021-03-24 13:15:07,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:15:07,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:15:07,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:15:07,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:15:07,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 01:15:06" (1/3) ... [2021-03-24 13:15:07,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5163f73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:15:07, skipping insertion in model container [2021-03-24 13:15:07,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:07" (2/3) ... [2021-03-24 13:15:07,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5163f73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:15:07, skipping insertion in model container [2021-03-24 13:15:07,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:15:07" (3/3) ... [2021-03-24 13:15:07,433 INFO L111 eAbstractionObserver]: Analyzing ICFG 09a-return-after-end.c [2021-03-24 13:15:07,438 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:15:07,441 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:15:07,442 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:15:07,459 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,460 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,460 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,460 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,460 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,460 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,461 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,461 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,461 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,461 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,461 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,462 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,462 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,462 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,462 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,462 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,464 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,464 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,465 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,465 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:07,467 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:15:07,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 13:15:07,510 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:15:07,510 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:15:07,510 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:15:07,510 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:15:07,510 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:15:07,510 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:15:07,511 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:15:07,511 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:15:07,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 55 flow [2021-03-24 13:15:07,548 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-03-24 13:15:07,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:07,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 1/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2021-03-24 13:15:07,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 25 transitions, 55 flow [2021-03-24 13:15:07,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 51 flow [2021-03-24 13:15:07,563 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:15:07,573 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 24 transitions, 51 flow [2021-03-24 13:15:07,575 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 24 transitions, 51 flow [2021-03-24 13:15:07,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 51 flow [2021-03-24 13:15:07,586 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-03-24 13:15:07,586 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:07,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 1/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2021-03-24 13:15:07,588 INFO L142 LiptonReduction]: Number of co-enabled transitions 96 [2021-03-24 13:15:07,990 INFO L154 LiptonReduction]: Checked pairs total: 68 [2021-03-24 13:15:07,990 INFO L156 LiptonReduction]: Total number of compositions: 13 [2021-03-24 13:15:07,992 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 430 [2021-03-24 13:15:07,999 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 13:15:07,999 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:07,999 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:15:08,000 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 13:15:08,000 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:15:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:15:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1389090397, now seen corresponding path program 1 times [2021-03-24 13:15:08,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:15:08,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543360597] [2021-03-24 13:15:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:15:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:15:08,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:15:08,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:15:08,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543360597] [2021-03-24 13:15:08,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:15:08,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:15:08,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947587838] [2021-03-24 13:15:08,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:15:08,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:15:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:15:08,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:15:08,168 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 38 [2021-03-24 13:15:08,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 11 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:15:08,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 38 [2021-03-24 13:15:08,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:15:08,186 INFO L129 PetriNetUnfolder]: 1/14 cut-off events. [2021-03-24 13:15:08,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:08,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 14 events. 1/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 14 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 15. Up to 5 conditions per place. [2021-03-24 13:15:08,188 INFO L132 encePairwiseOnDemand]: 35/38 looper letters, 1 selfloop transitions, 2 changer transitions 3/12 dead transitions. [2021-03-24 13:15:08,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 12 transitions, 37 flow [2021-03-24 13:15:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:15:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:15:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2021-03-24 13:15:08,198 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7631578947368421 [2021-03-24 13:15:08,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2021-03-24 13:15:08,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2021-03-24 13:15:08,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:15:08,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2021-03-24 13:15:08,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,208 INFO L185 Difference]: Start difference. First operand has 15 places, 11 transitions, 25 flow. Second operand 3 states and 87 transitions. [2021-03-24 13:15:08,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 12 transitions, 37 flow [2021-03-24 13:15:08,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 36 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:15:08,212 INFO L241 Difference]: Finished difference. Result has 17 places, 9 transitions, 28 flow [2021-03-24 13:15:08,214 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=17, PETRI_TRANSITIONS=9} [2021-03-24 13:15:08,215 INFO L343 CegarLoopForPetriNet]: 15 programPoint places, 2 predicate places. [2021-03-24 13:15:08,215 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 9 transitions, 28 flow [2021-03-24 13:15:08,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,215 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:15:08,215 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:15:08,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:15:08,216 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:15:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:15:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash 818969458, now seen corresponding path program 1 times [2021-03-24 13:15:08,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:15:08,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396979835] [2021-03-24 13:15:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:15:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:15:08,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:15:08,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:08,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:15:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396979835] [2021-03-24 13:15:08,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:15:08,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:15:08,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762426542] [2021-03-24 13:15:08,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:15:08,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:15:08,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:15:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:15:08,258 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 38 [2021-03-24 13:15:08,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 9 transitions, 28 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:15:08,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 38 [2021-03-24 13:15:08,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:15:08,280 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-24 13:15:08,281 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-24 13:15:08,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 12 events. 0/12 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 13:15:08,281 INFO L132 encePairwiseOnDemand]: 35/38 looper letters, 3 selfloop transitions, 1 changer transitions 1/10 dead transitions. [2021-03-24 13:15:08,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 10 transitions, 43 flow [2021-03-24 13:15:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:15:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:15:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2021-03-24 13:15:08,284 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2021-03-24 13:15:08,284 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 102 transitions. [2021-03-24 13:15:08,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 102 transitions. [2021-03-24 13:15:08,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:15:08,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 102 transitions. [2021-03-24 13:15:08,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,287 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,287 INFO L185 Difference]: Start difference. First operand has 17 places, 9 transitions, 28 flow. Second operand 4 states and 102 transitions. [2021-03-24 13:15:08,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 10 transitions, 43 flow [2021-03-24 13:15:08,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 37 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 13:15:08,288 INFO L241 Difference]: Finished difference. Result has 18 places, 9 transitions, 31 flow [2021-03-24 13:15:08,288 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=9} [2021-03-24 13:15:08,289 INFO L343 CegarLoopForPetriNet]: 15 programPoint places, 3 predicate places. [2021-03-24 13:15:08,289 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 9 transitions, 31 flow [2021-03-24 13:15:08,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,289 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:15:08,289 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:15:08,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:15:08,290 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:15:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:15:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash 818568628, now seen corresponding path program 2 times [2021-03-24 13:15:08,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:15:08,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264957245] [2021-03-24 13:15:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:15:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:15:08,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:15:08,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:08,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:08,349 INFO L142 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-03-24 13:15:08,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:15:08,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264957245] [2021-03-24 13:15:08,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:15:08,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:15:08,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523548277] [2021-03-24 13:15:08,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:15:08,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:15:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:15:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:15:08,356 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 38 [2021-03-24 13:15:08,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 9 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:15:08,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 38 [2021-03-24 13:15:08,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:15:08,368 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-24 13:15:08,368 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2021-03-24 13:15:08,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 9 events. 0/9 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 2/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:15:08,368 INFO L132 encePairwiseOnDemand]: 35/38 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2021-03-24 13:15:08,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 8 transitions, 31 flow [2021-03-24 13:15:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:15:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:15:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2021-03-24 13:15:08,370 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2021-03-24 13:15:08,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2021-03-24 13:15:08,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2021-03-24 13:15:08,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:15:08,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2021-03-24 13:15:08,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,373 INFO L185 Difference]: Start difference. First operand has 18 places, 9 transitions, 31 flow. Second operand 4 states and 100 transitions. [2021-03-24 13:15:08,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 8 transitions, 31 flow [2021-03-24 13:15:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 8 transitions, 28 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 13:15:08,374 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-03-24 13:15:08,374 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-03-24 13:15:08,374 INFO L343 CegarLoopForPetriNet]: 15 programPoint places, 2 predicate places. [2021-03-24 13:15:08,374 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-03-24 13:15:08,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:15:08,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:15:08,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:15:08 BasicIcfg [2021-03-24 13:15:08,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:15:08,379 INFO L168 Benchmark]: Toolchain (without parser) took 1548.90 ms. Allocated memory was 255.9 MB in the beginning and 341.8 MB in the end (delta: 86.0 MB). Free memory was 234.6 MB in the beginning and 317.5 MB in the end (delta: -82.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:08,380 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:08,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.43 ms. Allocated memory was 255.9 MB in the beginning and 341.8 MB in the end (delta: 86.0 MB). Free memory was 234.6 MB in the beginning and 325.7 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:08,381 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.77 ms. Allocated memory is still 341.8 MB. Free memory was 325.7 MB in the beginning and 324.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:08,381 INFO L168 Benchmark]: Boogie Preprocessor took 21.48 ms. Allocated memory is still 341.8 MB. Free memory was 324.2 MB in the beginning and 323.3 MB in the end (delta: 966.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:08,382 INFO L168 Benchmark]: RCFGBuilder took 343.63 ms. Allocated memory is still 341.8 MB. Free memory was 323.3 MB in the beginning and 311.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:08,382 INFO L168 Benchmark]: TraceAbstraction took 954.93 ms. Allocated memory is still 341.8 MB. Free memory was 310.8 MB in the beginning and 317.5 MB in the end (delta: -6.7 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:08,385 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 192.43 ms. Allocated memory was 255.9 MB in the beginning and 341.8 MB in the end (delta: 86.0 MB). Free memory was 234.6 MB in the beginning and 325.7 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.77 ms. Allocated memory is still 341.8 MB. Free memory was 325.7 MB in the beginning and 324.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.48 ms. Allocated memory is still 341.8 MB. Free memory was 324.2 MB in the beginning and 323.3 MB in the end (delta: 966.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 343.63 ms. Allocated memory is still 341.8 MB. Free memory was 323.3 MB in the beginning and 311.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 954.93 ms. Allocated memory is still 341.8 MB. Free memory was 310.8 MB in the beginning and 317.5 MB in the end (delta: -6.7 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 414.5ms, 27 PlacesBefore, 15 PlacesAfterwards, 24 TransitionsBefore, 11 TransitionsAfterwards, 96 CoEnabledTransitionPairs, 3 FixpointIterations, 6 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 13 TotalNumberOfCompositions, 68 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 64, positive: 57, positive conditional: 0, positive unconditional: 57, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 46, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 46, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 64, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 46, unknown conditional: 0, unknown unconditional: 46] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 868.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 103.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 484.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=2, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.3ms SsaConstructionTime, 36.8ms SatisfiabilityAnalysisTime, 123.3ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 45 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...