/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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/multiple_fork_same_id.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:41:31,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:41:31,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:41:31,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 20:41:31,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 20:41:31,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 20:41:31,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 20:41:31,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 20:41:31,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 20:41:31,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 20:41:31,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 20:41:31,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 20:41:31,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 20:41:31,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 20:41:31,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 20:41:31,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 20:41:31,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 20:41:31,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 20:41:31,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 20:41:31,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 20:41:31,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 20:41:31,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 20:41:31,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 20:41:31,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 20:41:31,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 20:41:31,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 20:41:31,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 20:41:31,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 20:41:31,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 20:41:31,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 20:41:31,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 20:41:31,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 20:41:31,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 20:41:31,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 20:41:31,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 20:41:31,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 20:41:31,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 20:41:31,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 20:41:31,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 20:41:31,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 20:41:31,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 20:41:31,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 20:41:31,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:41:31,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:41:31,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:41:31,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:41:31,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:41:31,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:41:31,334 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:41:31,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:41:31,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:41:31,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:41:31,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:41:31,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:41:31,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:41:31,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:41:31,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:41:31,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:41:31,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:41:31,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:41:31,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:41:31,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:41:31,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:41:31,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:41:31,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:41:31,337 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:41:31,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:41:31,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:41:31,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:41:31,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:41:31,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:41:31,582 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:41:31,583 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:41:31,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/multiple_fork_same_id.bpl [2021-03-10 20:41:31,584 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/multiple_fork_same_id.bpl' [2021-03-10 20:41:31,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:41:31,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:41:31,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:31,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:41:31,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:41:31,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:31,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:41:31,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:41:31,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:41:31,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/1) ... [2021-03-10 20:41:31,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:41:31,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:41:31,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:41:31,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:41:31,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (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 [2021-03-10 20:41:31,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure increment given in one single declaration [2021-03-10 20:41:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-10 20:41:31,686 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-10 20:41:31,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:41:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:41:31,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:41:31,687 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:41:31,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:41:31,764 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:41:31,765 INFO L202 PluginConnector]: Adding new model multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:31 BoogieIcfgContainer [2021-03-10 20:41:31,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:41:31,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:41:31,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:41:31,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:41:31,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:31" (1/2) ... [2021-03-10 20:41:31,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d779f7d and model type multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:41:31, skipping insertion in model container [2021-03-10 20:41:31,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:31" (2/2) ... [2021-03-10 20:41:31,769 INFO L111 eAbstractionObserver]: Analyzing ICFG multiple_fork_same_id.bpl [2021-03-10 20:41:31,772 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:41:31,772 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:41:31,774 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:41:31,775 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:41:31,788 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,788 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,788 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,788 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,789 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,789 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,789 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,789 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,789 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,789 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,790 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,790 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,791 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,794 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,795 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork2_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:31,800 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 20:41:31,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:41:31,821 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:41:31,821 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:41:31,821 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:41:31,822 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:41:31,822 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:41:31,822 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:41:31,822 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:41:31,822 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:41:31,827 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 18 transitions, 60 flow [2021-03-10 20:41:31,840 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 148 states, 142 states have (on average 2.3450704225352115) internal successors, (333), 147 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 142 states have (on average 2.3450704225352115) internal successors, (333), 147 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:41:31,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:31,846 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:31,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1187485911, now seen corresponding path program 1 times [2021-03-10 20:41:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:31,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261161119] [2021-03-10 20:41:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:31,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261161119] [2021-03-10 20:41:31,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:31,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614496106] [2021-03-10 20:41:31,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:41:31,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:31,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:41:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:41:31,984 INFO L87 Difference]: Start difference. First operand has 148 states, 142 states have (on average 2.3450704225352115) internal successors, (333), 147 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:32,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:32,063 INFO L93 Difference]: Finished difference Result 139 states and 312 transitions. [2021-03-10 20:41:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:41:32,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-03-10 20:41:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:32,070 INFO L225 Difference]: With dead ends: 139 [2021-03-10 20:41:32,070 INFO L226 Difference]: Without dead ends: 76 [2021-03-10 20:41:32,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:41:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-10 20:41:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-03-10 20:41:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.22972972972973) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-03-10 20:41:32,096 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 7 [2021-03-10 20:41:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:32,096 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-03-10 20:41:32,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-03-10 20:41:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:41:32,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:32,097 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:32,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:41:32,097 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:32,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1047289434, now seen corresponding path program 1 times [2021-03-10 20:41:32,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:32,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397961962] [2021-03-10 20:41:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:41:32,103 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:41:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:41:32,107 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:41:32,115 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:41:32,115 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:41:32,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:41:32,123 INFO L202 PluginConnector]: Adding new model multiple_fork_same_id.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:41:32 BasicIcfg [2021-03-10 20:41:32,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:41:32,124 INFO L168 Benchmark]: Toolchain (without parser) took 511.96 ms. Allocated memory is still 352.3 MB. Free memory was 332.6 MB in the beginning and 312.7 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:32,125 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 352.3 MB. Free memory was 333.5 MB in the beginning and 333.5 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:32,125 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 352.3 MB. Free memory was 332.0 MB in the beginning and 330.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:32,126 INFO L168 Benchmark]: Boogie Preprocessor took 7.82 ms. Allocated memory is still 352.3 MB. Free memory was 330.6 MB in the beginning and 329.7 MB in the end (delta: 803.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:32,126 INFO L168 Benchmark]: RCFGBuilder took 120.40 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 321.4 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:32,127 INFO L168 Benchmark]: TraceAbstraction took 357.79 ms. Allocated memory is still 352.3 MB. Free memory was 321.0 MB in the beginning and 312.7 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:32,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 352.3 MB. Free memory was 333.5 MB in the beginning and 333.5 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 352.3 MB. Free memory was 332.0 MB in the beginning and 330.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 7.82 ms. Allocated memory is still 352.3 MB. Free memory was 330.6 MB in the beginning and 329.7 MB in the end (delta: 803.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 120.40 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 321.4 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 357.79 ms. Allocated memory is still 352.3 MB. Free memory was 321.0 MB in the beginning and 312.7 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: assertion can be violated assertion can be violated We found a FailurePath: [L19] FORK 0 fork 42 increment(7); VAL [n=7] [L20] FORK 0 fork 42 increment(23); VAL [n=7] [L34] 2 res := n + 1; VAL [n=7, res=24] [L21] FORK 0 fork 42 increment(39); VAL [n=39, res=24] [L24] JOIN 2 join 42 assign x; VAL [n=39, res=24, x=24] [L28] 0 assert x == 8 || x == 40; VAL [n=39, res=24, x=24] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 296.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.7ms, AutomataDifference: 99.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 34 SDslu, 27 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.1ms SsaConstructionTime, 13.7ms SatisfiabilityAnalysisTime, 59.7ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 42 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...