/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:15:51,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:15:51,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:15:51,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 14:15:51,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 14:15:51,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 14:15:51,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 14:15:51,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 14:15:51,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 14:15:51,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 14:15:51,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 14:15:51,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 14:15:51,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 14:15:51,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 14:15:51,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 14:15:51,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 14:15:51,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 14:15:51,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 14:15:51,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 14:15:51,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 14:15:51,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 14:15:51,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 14:15:51,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 14:15:51,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 14:15:51,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 14:15:51,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 14:15:51,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 14:15:51,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 14:15:51,534 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-SemanticLbe.epf [2021-03-11 14:15:51,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:15:51,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:15:51,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:15:51,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:15:51,564 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:15:51,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:15:51,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:15:51,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:15:51,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:15:51,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:15:51,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:15:51,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:15:51,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:15:51,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:15:51,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:15:51,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:15:51,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:15:51,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:15:51,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:15:51,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:15:51,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:15:51,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:15:51,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:15:51,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:15:51,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:15:51,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:15:51,812 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:15:51,814 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:15:51,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl [2021-03-11 14:15:51,815 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl' [2021-03-11 14:15:51,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:15:51,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:15:51,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:15:51,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:15:51,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:15:51,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:15:51,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:15:51,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:15:51,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:15:51,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/1) ... [2021-03-11 14:15:51,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:15:51,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:15:51,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:15:51,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:15:51,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (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 [2021-03-11 14:15:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-03-11 14:15:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-03-11 14:15:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-11 14:15:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-11 14:15:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:15:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:15:51,914 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 14:15:51,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:15:51,998 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 14:15:51,998 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:15:51 BoogieIcfgContainer [2021-03-11 14:15:51,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:15:52,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:15:52,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:15:52,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:15:52,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:51" (1/2) ... [2021-03-11 14:15:52,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ba91a7 and model type ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:15:52, skipping insertion in model container [2021-03-11 14:15:52,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:15:51" (2/2) ... [2021-03-11 14:15:52,019 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdTest-Unsafe.bpl [2021-03-11 14:15:52,026 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:15:52,026 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:15:52,028 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 14:15:52,029 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:15:52,052 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,052 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,053 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,053 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,057 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,057 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,057 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,058 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,061 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,067 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:52,076 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 14:15:52,089 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 14:15:52,115 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:15:52,115 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:15:52,115 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:15:52,115 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:15:52,115 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:15:52,115 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:15:52,115 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:15:52,115 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:15:52,122 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:15:52,132 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 14 transitions, 44 flow [2021-03-11 14:15:52,135 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 14 transitions, 44 flow [2021-03-11 14:15:52,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 14 transitions, 44 flow [2021-03-11 14:15:52,153 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-11 14:15:52,153 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 14:15:52,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 15 events. 0/15 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 14:15:52,156 INFO L116 LiptonReduction]: Number of co-enabled transitions 44 [2021-03-11 14:15:52,236 INFO L131 LiptonReduction]: Checked pairs total: 33 [2021-03-11 14:15:52,236 INFO L133 LiptonReduction]: Total number of compositions: 3 [2021-03-11 14:15:52,251 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 11 transitions, 38 flow [2021-03-11 14:15:52,256 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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) [2021-03-11 14:15:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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) [2021-03-11 14:15:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:15:52,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:15:52,261 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:15:52,261 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:15:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:15:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1428805206, now seen corresponding path program 1 times [2021-03-11 14:15:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:15:52,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817728375] [2021-03-11 14:15:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:15:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:15:52,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:52,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:15:52,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:52,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 14:15:52,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:52,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:15:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:15:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817728375] [2021-03-11 14:15:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:15:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:15:52,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604971023] [2021-03-11 14:15:52,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 14:15:52,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:15:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 14:15:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:15:52,373 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-03-11 14:15:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:15:52,381 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2021-03-11 14:15:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 14:15:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-03-11 14:15:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:15:52,386 INFO L225 Difference]: With dead ends: 14 [2021-03-11 14:15:52,386 INFO L226 Difference]: Without dead ends: 12 [2021-03-11 14:15:52,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:15:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-03-11 14:15:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-03-11 14:15:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-03-11 14:15:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-03-11 14:15:52,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 6 [2021-03-11 14:15:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:15:52,405 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-03-11 14:15:52,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-03-11 14:15:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-03-11 14:15:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:15:52,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:15:52,405 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:15:52,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:15:52,406 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:15:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:15:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1428660064, now seen corresponding path program 1 times [2021-03-11 14:15:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:15:52,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989965627] [2021-03-11 14:15:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:15:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:15:52,412 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:15:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:15:52,416 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:15:52,425 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:15:52,425 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:15:52,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:15:52,433 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:15:52 BasicIcfg [2021-03-11 14:15:52,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:15:52,434 INFO L168 Benchmark]: Toolchain (without parser) took 592.90 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 212.2 MB in the end (delta: 24.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:52,434 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:52,434 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.61 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:52,435 INFO L168 Benchmark]: Boogie Preprocessor took 11.07 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.8 MB in the end (delta: 702.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:52,435 INFO L168 Benchmark]: RCFGBuilder took 126.00 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 225.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:52,436 INFO L168 Benchmark]: TraceAbstraction took 418.53 ms. Allocated memory is still 255.9 MB. Free memory was 241.6 MB in the beginning and 212.2 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:52,437 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.61 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.07 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.8 MB in the end (delta: 702.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 126.00 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 225.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 418.53 ms. Allocated memory is still 255.9 MB. Free memory was 241.6 MB in the beginning and 212.2 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 101.1ms, 20 PlacesBefore, 17 PlacesAfterwards, 14 TransitionsBefore, 11 TransitionsAfterwards, 44 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 33 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 33, positive: 33, positive conditional: 0, positive unconditional: 33, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 33, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 28, unknown conditional: 0, unknown unconditional: 28] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - CounterExampleResult [Line: 22]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; VAL [x=0] [L19] FORK 0 fork 1 increment(x); VAL [n=0, x=0] [L20] FORK 0 fork 2 decrement(x); VAL [n=0, n=0, x=0] [L37] 2 res := n - 1; [L21] JOIN 2 join 2 assign y; VAL [n=0, n=0, res=-1, x=0, y=-1] [L22] 0 assert y == 1; VAL [n=0, n=0, res=-1, x=0, y=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 312.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 4.2ms, AutomataDifference: 22.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 140.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 4 SDslu, 1 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.3ms SsaConstructionTime, 13.6ms SatisfiabilityAnalysisTime, 33.4ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 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...