/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/concurrent/pthreads/predecessorInAtomicBlockBug.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:03:01,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:03:01,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:03:01,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:03:01,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:03:01,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:03:01,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:03:01,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:03:01,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:03:01,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:03:01,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:03:01,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:03:01,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:03:01,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:03:01,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:03:01,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:03:01,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:03:01,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:03:01,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:03:01,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:03:01,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:03:01,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:03:01,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:03:01,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:03:01,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 14:03:01,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:03:01,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:03:01,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:03:01,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:03:01,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:03:01,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:03:01,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:03:01,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:03:01,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:03:01,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:03:01,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:03:01,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-09 14:03:01,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:03:01,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:03:01,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:03:01,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:03:01,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:03:01,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:03:01,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:03:01,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:03:01,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:03:01,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:03:01,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:03:01,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:03:01,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:03:01,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:03:01,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:03:01,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:03:01,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:03:01,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:03:01,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:03:01,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:03:01,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:03:01,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:03:01,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:03:01,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:03:01,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:03:01,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 14:03:01,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:03:01,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 14:03:01,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 14:03:01,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:03:01,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:03:01,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:03:01,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:03:01,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:03:01,518 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:03:01,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/predecessorInAtomicBlockBug.c [2020-10-09 14:03:01,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc6d2e0f/85e1aca9800240d09253c14872a28c09/FLAG6bc0fb358 [2020-10-09 14:03:02,077 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:03:02,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/predecessorInAtomicBlockBug.c [2020-10-09 14:03:02,079 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-09 14:03:02,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc6d2e0f/85e1aca9800240d09253c14872a28c09/FLAG6bc0fb358 [2020-10-09 14:03:02,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc6d2e0f/85e1aca9800240d09253c14872a28c09 [2020-10-09 14:03:02,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:03:02,442 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:03:02,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:03:02,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:03:02,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:03:02,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6735223d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02, skipping insertion in model container [2020-10-09 14:03:02,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:03:02,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:03:02,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:03:02,755 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:03:02,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:03:02,791 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:03:02,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02 WrapperNode [2020-10-09 14:03:02,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:03:02,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:03:02,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:03:02,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:03:02,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:03:02,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:03:02,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:03:02,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:03:02,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (1/1) ... [2020-10-09 14:03:02,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:03:02,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:03:02,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:03:02,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:03:02,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (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 [2020-10-09 14:03:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:03:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:03:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:03:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-09 14:03:02,912 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-09 14:03:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:03:02,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:03:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:03:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:03:02,916 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:03:03,119 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:03:03,119 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-09 14:03:03,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:03:03 BoogieIcfgContainer [2020-10-09 14:03:03,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:03:03,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:03:03,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:03:03,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:03:03,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:03:02" (1/3) ... [2020-10-09 14:03:03,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6362f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:03:03, skipping insertion in model container [2020-10-09 14:03:03,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:03:02" (2/3) ... [2020-10-09 14:03:03,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6362f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:03:03, skipping insertion in model container [2020-10-09 14:03:03,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:03:03" (3/3) ... [2020-10-09 14:03:03,132 INFO L111 eAbstractionObserver]: Analyzing ICFG predecessorInAtomicBlockBug.c [2020-10-09 14:03:03,146 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 14:03:03,147 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:03:03,160 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:03:03,161 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:03:03,227 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,227 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,228 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,228 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,229 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,229 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,239 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,240 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,240 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,240 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:03:03,279 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:03:03,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:03:03,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 14:03:03,303 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:03:03,304 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:03:03,304 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:03:03,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:03:03,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:03:03,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:03:03,318 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 14:03:03,321 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 22 transitions, 49 flow [2020-10-09 14:03:03,324 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 22 transitions, 49 flow [2020-10-09 14:03:03,326 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 49 flow [2020-10-09 14:03:03,354 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2020-10-09 14:03:03,354 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:03:03,357 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 21 events. 0/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-10-09 14:03:03,358 INFO L117 LiptonReduction]: Number of co-enabled transitions 70 [2020-10-09 14:03:03,840 INFO L132 LiptonReduction]: Checked pairs total: 74 [2020-10-09 14:03:03,841 INFO L134 LiptonReduction]: Total number of compositions: 16 [2020-10-09 14:03:03,849 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 7 transitions, 19 flow [2020-10-09 14:03:03,859 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 11 states. [2020-10-09 14:03:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-09 14:03:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-09 14:03:03,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 14:03:03,871 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-09 14:03:03,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:03:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:03:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash 94820, now seen corresponding path program 1 times [2020-10-09 14:03:03,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 14:03:03,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026552040] [2020-10-09 14:03:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 14:03:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:03:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:03:04,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026552040] [2020-10-09 14:03:04,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:03:04,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-09 14:03:04,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333834802] [2020-10-09 14:03:04,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 14:03:04,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 14:03:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 14:03:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 14:03:04,095 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-10-09 14:03:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 14:03:04,136 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-10-09 14:03:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 14:03:04,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-09 14:03:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 14:03:04,149 INFO L225 Difference]: With dead ends: 12 [2020-10-09 14:03:04,150 INFO L226 Difference]: Without dead ends: 7 [2020-10-09 14:03:04,152 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 14:03:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-09 14:03:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-09 14:03:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 14:03:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-10-09 14:03:04,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 3 [2020-10-09 14:03:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 14:03:04,193 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-10-09 14:03:04,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 14:03:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-10-09 14:03:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 14:03:04,194 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 14:03:04,194 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 14:03:04,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 14:03:04,195 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:03:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:03:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2939628, now seen corresponding path program 1 times [2020-10-09 14:03:04,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 14:03:04,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674784522] [2020-10-09 14:03:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 14:03:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 14:03:04,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:03:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 14:03:04,225 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:03:04,249 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 14:03:04,250 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 14:03:04,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 14:03:04,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:03:04 BasicIcfg [2020-10-09 14:03:04,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:03:04,282 INFO L168 Benchmark]: Toolchain (without parser) took 1839.44 ms. Allocated memory was 246.9 MB in the beginning and 302.0 MB in the end (delta: 55.1 MB). Free memory was 202.5 MB in the beginning and 184.4 MB in the end (delta: 18.1 MB). Peak memory consumption was 73.1 MB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,284 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 246.9 MB. Free memory was 225.0 MB in the beginning and 224.2 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.82 ms. Allocated memory was 246.9 MB in the beginning and 302.0 MB in the end (delta: 55.1 MB). Free memory was 202.5 MB in the beginning and 277.0 MB in the end (delta: -74.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 302.0 MB. Free memory was 277.0 MB in the beginning and 275.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,287 INFO L168 Benchmark]: Boogie Preprocessor took 22.90 ms. Allocated memory is still 302.0 MB. Free memory was 275.2 MB in the beginning and 274.4 MB in the end (delta: 838.8 kB). Peak memory consumption was 838.8 kB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,288 INFO L168 Benchmark]: RCFGBuilder took 271.59 ms. Allocated memory is still 302.0 MB. Free memory was 274.4 MB in the beginning and 258.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,289 INFO L168 Benchmark]: TraceAbstraction took 1155.67 ms. Allocated memory is still 302.0 MB. Free memory was 258.4 MB in the beginning and 184.4 MB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 14.2 GB. [2020-10-09 14:03:04,294 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 246.9 MB. Free memory was 225.0 MB in the beginning and 224.2 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 348.82 ms. Allocated memory was 246.9 MB in the beginning and 302.0 MB in the end (delta: 55.1 MB). Free memory was 202.5 MB in the beginning and 277.0 MB in the end (delta: -74.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 302.0 MB. Free memory was 277.0 MB in the beginning and 275.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 22.90 ms. Allocated memory is still 302.0 MB. Free memory was 275.2 MB in the beginning and 274.4 MB in the end (delta: 838.8 kB). Peak memory consumption was 838.8 kB. Max. memory is 14.2 GB. * RCFGBuilder took 271.59 ms. Allocated memory is still 302.0 MB. Free memory was 274.4 MB in the beginning and 258.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1155.67 ms. Allocated memory is still 302.0 MB. Free memory was 258.4 MB in the beginning and 184.4 MB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 40 VarBasedMoverChecksPositive, 8 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 2 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.5s, 26 PlacesBefore, 11 PlacesAfterwards, 22 TransitionsBefore, 7 TransitionsAfterwards, 70 CoEnabledTransitionPairs, 4 FixpointIterations, 7 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 16 TotalNumberOfCompositions, 74 MoverChecksTotal - CounterExampleResult [Line: 19]: assertion can be violated assertion can be violated We found a FailurePath: [L16] 0 int x = 0; [L24] 0 pthread_t threadId; [L25] FCALL, FORK 0 pthread_create(&threadId, NULL, & foo, NULL) VAL [arg={0:0}, x=0] [L27] 0 x = x - 1 VAL [arg={0:0}, x=-1] [L19] 1 CodeAnnotStmt[Assertion] VAL [arg={0:0}, arg={0:0}, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.5s, HoareTripleCheckerStatistics: 4 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 7 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...