/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/assume_false.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-11 09:25:47,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-11 09:25:47,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-11 09:25:47,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-11 09:25:47,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-11 09:25:47,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-11 09:25:47,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-11 09:25:47,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-11 09:25:47,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-11 09:25:47,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-11 09:25:47,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-11 09:25:47,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-11 09:25:47,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-11 09:25:47,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-11 09:25:47,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-11 09:25:47,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-11 09:25:47,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-11 09:25:47,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-11 09:25:47,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-11 09:25:47,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-11 09:25:47,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-11 09:25:47,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-11 09:25:47,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-11 09:25:47,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-11 09:25:47,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-11 09:25:47,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-11 09:25:47,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-11 09:25:47,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-11 09:25:47,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-11 09:25:47,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-11 09:25:47,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-11 09:25:47,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-11 09:25:47,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-11 09:25:47,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-11 09:25:47,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-11 09:25:47,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-11 09:25:47,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-11 09:25:47,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-11 09:25:47,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-11 09:25:47,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-11 09:25:47,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-11 09:25:47,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf [2021-06-11 09:25:47,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-11 09:25:47,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-11 09:25:47,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-11 09:25:47,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-11 09:25:47,672 INFO L138 SettingsManager]: * Use SBE=true [2021-06-11 09:25:47,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-11 09:25:47,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-11 09:25:47,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-11 09:25:47,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 09:25:47,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-11 09:25:47,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-11 09:25:47,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-11 09:25:47,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-11 09:25:47,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-11 09:25:47,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-11 09:25:47,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-06-11 09:25:47,676 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-11 09:25:47,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-11 09:25:47,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-11 09:25:47,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-11 09:25:47,969 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-11 09:25:47,970 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-11 09:25:47,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/assume_false.bpl [2021-06-11 09:25:47,971 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/assume_false.bpl' [2021-06-11 09:25:47,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-11 09:25:48,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-11 09:25:48,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-11 09:25:48,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-11 09:25:48,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-11 09:25:48,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-11 09:25:48,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-11 09:25:48,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-11 09:25:48,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-11 09:25:48,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/1) ... [2021-06-11 09:25:48,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-11 09:25:48,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-11 09:25:48,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-11 09:25:48,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-11 09:25:48,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (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 [2021-06-11 09:25:48,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-11 09:25:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-11 09:25:48,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-11 09:25:48,101 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-11 09:25:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-11 09:25:48,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-11 09:25:48,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-11 09:25:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-11 09:25:48,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-11 09:25:48,103 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-11 09:25:48,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-11 09:25:48,200 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-11 09:25:48,201 INFO L202 PluginConnector]: Adding new model assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 09:25:48 BoogieIcfgContainer [2021-06-11 09:25:48,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-11 09:25:48,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-11 09:25:48,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-11 09:25:48,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-11 09:25:48,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:47" (1/2) ... [2021-06-11 09:25:48,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267bcf8a and model type assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.06 09:25:48, skipping insertion in model container [2021-06-11 09:25:48,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 09:25:48" (2/2) ... [2021-06-11 09:25:48,207 INFO L111 eAbstractionObserver]: Analyzing ICFG assume_false.bpl [2021-06-11 09:25:48,212 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-11 09:25:48,215 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-11 09:25:48,216 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-11 09:25:48,237 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-11 09:25:48,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-11 09:25:48,272 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-11 09:25:48,272 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-11 09:25:48,272 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-11 09:25:48,272 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-11 09:25:48,272 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-11 09:25:48,272 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-11 09:25:48,273 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-11 09:25:48,273 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-11 09:25:48,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 19 places, 12 transitions, 34 flow [2021-06-11 09:25:48,294 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-11 09:25:48,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 09:25:48,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-06-11 09:25:48,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 12 transitions, 34 flow [2021-06-11 09:25:48,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 8 transitions, 22 flow [2021-06-11 09:25:48,300 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 09:25:48,313 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 8 transitions, 22 flow [2021-06-11 09:25:48,316 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 8 transitions, 22 flow [2021-06-11 09:25:48,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 8 transitions, 22 flow [2021-06-11 09:25:48,320 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-06-11 09:25:48,321 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 09:25:48,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 8 events. 0/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-06-11 09:25:48,322 INFO L151 LiptonReduction]: Number of co-enabled transitions 20 [2021-06-11 09:25:48,379 INFO L163 LiptonReduction]: Checked pairs total: 9 [2021-06-11 09:25:48,379 INFO L165 LiptonReduction]: Total number of compositions: 2 [2021-06-11 09:25:48,381 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 82 [2021-06-11 09:25:48,389 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-06-11 09:25:48,389 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 09:25:48,389 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 09:25:48,390 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-11 09:25:48,390 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-11 09:25:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 09:25:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1427046, now seen corresponding path program 1 times [2021-06-11 09:25:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 09:25:48,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825739535] [2021-06-11 09:25:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 09:25:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 09:25:48,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 09:25:48,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 09:25:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 09:25:48,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825739535] [2021-06-11 09:25:48,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 09:25:48,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-11 09:25:48,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586927050] [2021-06-11 09:25:48,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-11 09:25:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 09:25:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-11 09:25:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-11 09:25:48,508 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 14 [2021-06-11 09:25:48,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 7 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-06-11 09:25:48,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 09:25:48,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 14 [2021-06-11 09:25:48,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 09:25:48,521 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-06-11 09:25:48,522 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 09:25:48,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-11 09:25:48,523 INFO L132 encePairwiseOnDemand]: 10/14 looper letters, 1 selfloop transitions, 2 changer transitions 0/6 dead transitions. [2021-06-11 09:25:48,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 6 transitions, 24 flow [2021-06-11 09:25:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-11 09:25:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-11 09:25:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2021-06-11 09:25:48,532 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2021-06-11 09:25:48,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 26 transitions. [2021-06-11 09:25:48,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 26 transitions. [2021-06-11 09:25:48,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 09:25:48,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 26 transitions. [2021-06-11 09:25:48,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-06-11 09:25:48,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-06-11 09:25:48,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-06-11 09:25:48,541 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 20 flow. Second operand 3 states and 26 transitions. [2021-06-11 09:25:48,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 6 transitions, 24 flow [2021-06-11 09:25:48,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 22 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-11 09:25:48,545 INFO L241 Difference]: Finished difference. Result has 14 places, 6 transitions, 24 flow [2021-06-11 09:25:48,547 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=14, PETRI_TRANSITIONS=6} [2021-06-11 09:25:48,547 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 0 predicate places. [2021-06-11 09:25:48,547 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 09:25:48,548 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 6 transitions, 24 flow [2021-06-11 09:25:48,548 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 6 transitions, 24 flow [2021-06-11 09:25:48,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 14 places, 6 transitions, 24 flow [2021-06-11 09:25:48,550 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-06-11 09:25:48,551 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 09:25:48,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-11 09:25:48,551 INFO L151 LiptonReduction]: Number of co-enabled transitions 6 [2021-06-11 09:25:48,552 INFO L163 LiptonReduction]: Checked pairs total: 0 [2021-06-11 09:25:48,552 INFO L165 LiptonReduction]: Total number of compositions: 0 [2021-06-11 09:25:48,552 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5 [2021-06-11 09:25:48,553 INFO L480 AbstractCegarLoop]: Abstraction has has 14 places, 6 transitions, 24 flow [2021-06-11 09:25:48,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-06-11 09:25:48,553 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 09:25:48,553 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-06-11 09:25:48,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-11 09:25:48,554 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-11 09:25:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 09:25:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash 44229986, now seen corresponding path program 1 times [2021-06-11 09:25:48,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 09:25:48,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748436873] [2021-06-11 09:25:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 09:25:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-11 09:25:48,559 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-11 09:25:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-11 09:25:48,561 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-11 09:25:48,573 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-11 09:25:48,574 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-11 09:25:48,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-11 09:25:48,586 INFO L202 PluginConnector]: Adding new model assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.06 09:25:48 BasicIcfg [2021-06-11 09:25:48,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-11 09:25:48,587 INFO L168 Benchmark]: Toolchain (without parser) took 586.17 ms. Allocated memory is still 356.5 MB. Free memory was 336.0 MB in the beginning and 322.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:48,588 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 356.5 MB. Free memory is still 336.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 09:25:48,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 356.5 MB. Free memory was 335.9 MB in the beginning and 334.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 09:25:48,589 INFO L168 Benchmark]: Boogie Preprocessor took 10.94 ms. Allocated memory is still 356.5 MB. Free memory was 334.4 MB in the beginning and 333.6 MB in the end (delta: 847.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 09:25:48,590 INFO L168 Benchmark]: RCFGBuilder took 163.18 ms. Allocated memory is still 356.5 MB. Free memory was 333.5 MB in the beginning and 325.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:48,590 INFO L168 Benchmark]: TraceAbstraction took 384.09 ms. Allocated memory is still 356.5 MB. Free memory was 325.1 MB in the beginning and 322.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:48,592 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 0.13 ms. Allocated memory is still 356.5 MB. Free memory is still 336.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 356.5 MB. Free memory was 335.9 MB in the beginning and 334.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.94 ms. Allocated memory is still 356.5 MB. Free memory was 334.4 MB in the beginning and 333.6 MB in the end (delta: 847.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 163.18 ms. Allocated memory is still 356.5 MB. Free memory was 333.5 MB in the beginning and 325.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 384.09 ms. Allocated memory is still 356.5 MB. Free memory was 325.1 MB in the beginning and 322.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 62.8ms, 15 PlacesBefore, 14 PlacesAfterwards, 8 TransitionsBefore, 7 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 9 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 9, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 9, unknown conditional: 0, unknown unconditional: 9] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6ms, 14 PlacesBefore, 14 PlacesAfterwards, 6 TransitionsBefore, 6 TransitionsAfterwards, 6 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.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: 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] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - CounterExampleResult [Line: 13]: assertion can be violated assertion can be violated We found a FailurePath: [L19] 0 x := true; VAL [x=true] [L21] FORK 0 fork 1 thread1(); VAL [x=true] [L7] 1 x := false; VAL [x=false] [L22] FORK 0 fork 2 thread2(); VAL [x=false] [L13] 2 assert x; VAL [x=false] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 307.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 42.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 113.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.5ms SsaConstructionTime, 10.5ms SatisfiabilityAnalysisTime, 30.6ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 3 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...