/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 22:13:10,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 22:13:10,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 22:13:10,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 22:13:10,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 22:13:10,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 22:13:10,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 22:13:10,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 22:13:10,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 22:13:10,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 22:13:10,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 22:13:10,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 22:13:10,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 22:13:10,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 22:13:10,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 22:13:10,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 22:13:10,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 22:13:10,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 22:13:10,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 22:13:10,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 22:13:10,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 22:13:10,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 22:13:10,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 22:13:10,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 22:13:10,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 22:13:10,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 22:13:10,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 22:13:10,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 22:13:10,647 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-NoLbe.epf [2021-08-12 22:13:10,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 22:13:10,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 22:13:10,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 22:13:10,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 22:13:10,672 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 22:13:10,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 22:13:10,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 22:13:10,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 22:13:10,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 22:13:10,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 22:13:10,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 22:13:10,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 22:13:10,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 22:13:10,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 22:13:10,675 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 22:13:10,676 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-12 22:13:10,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 22:13:10,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 22:13:10,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 22:13:10,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 22:13:10,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 22:13:10,978 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 22:13:10,978 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 22:13:10,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl [2021-08-12 22:13:10,979 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl' [2021-08-12 22:13:11,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 22:13:11,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 22:13:11,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 22:13:11,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 22:13:11,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 22:13:11,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 22:13:11,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 22:13:11,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 22:13:11,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 22:13:11,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/1) ... [2021-08-12 22:13:11,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 22:13:11,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 22:13:11,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 22:13:11,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 22:13:11,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (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 [2021-08-12 22:13:11,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 22:13:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 22:13:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 22:13:11,133 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 22:13:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 22:13:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 22:13:11,133 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 22:13:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 22:13:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 22:13:11,134 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 22:13:11,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 22:13:11,259 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 22:13:11,261 INFO L202 PluginConnector]: Adding new model exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 10:13:11 BoogieIcfgContainer [2021-08-12 22:13:11,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 22:13:11,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 22:13:11,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 22:13:11,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 22:13:11,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 10:13:11" (1/2) ... [2021-08-12 22:13:11,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ab75ac and model type exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 10:13:11, skipping insertion in model container [2021-08-12 22:13:11,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 10:13:11" (2/2) ... [2021-08-12 22:13:11,267 INFO L111 eAbstractionObserver]: Analyzing ICFG exp-term-symm.wvr.bpl [2021-08-12 22:13:11,274 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 22:13:11,274 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 22:13:11,276 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 22:13:11,324 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 22:13:11,341 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 22:13:11,369 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 22:13:11,369 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 22:13:11,369 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 22:13:11,369 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 22:13:11,369 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 22:13:11,369 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 22:13:11,370 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 22:13:11,370 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 22:13:11,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-08-12 22:13:11,387 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-08-12 22:13:11,388 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-12 22:13:11,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 0/12 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-12 22:13:11,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-08-12 22:13:11,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-08-12 22:13:11,395 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-08-12 22:13:11,395 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-12 22:13:11,395 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 22:13:11,395 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 22:13:11,396 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 22:13:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 22:13:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1429089767, now seen corresponding path program 1 times [2021-08-12 22:13:11,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 22:13:11,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799849951] [2021-08-12 22:13:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 22:13:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 22:13:11,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 22:13:11,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-12 22:13:11,632 INFO L142 QuantifierPusher]: treesize reduction 25, result has 78.3 percent of original size [2021-08-12 22:13:11,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-08-12 22:13:11,802 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-08-12 22:13:11,805 INFO L142 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-08-12 22:13:11,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-08-12 22:13:11,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 22:13:11,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-12 22:13:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 22:13:11,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 22:13:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799849951] [2021-08-12 22:13:11,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799849951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 22:13:11,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 22:13:11,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 22:13:11,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684093662] [2021-08-12 22:13:11,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 22:13:11,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 22:13:11,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 22:13:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 22:13:11,865 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-08-12 22:13:11,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 10 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-08-12 22:13:11,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 22:13:11,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-08-12 22:13:11,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 22:13:11,945 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-08-12 22:13:11,945 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-08-12 22:13:11,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 16 events. 0/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-12 22:13:11,946 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 2 selfloop transitions, 1 changer transitions 1/11 dead transitions. [2021-08-12 22:13:11,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 42 flow [2021-08-12 22:13:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 22:13:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-12 22:13:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-08-12 22:13:11,956 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2021-08-12 22:13:11,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-08-12 22:13:11,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-08-12 22:13:11,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 22:13:11,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-08-12 22:13:11,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-08-12 22:13:11,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2021-08-12 22:13:11,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2021-08-12 22:13:11,962 INFO L348 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2021-08-12 22:13:11,962 INFO L482 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 42 flow [2021-08-12 22:13:11,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-08-12 22:13:11,962 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 22:13:11,962 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 22:13:11,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 22:13:11,962 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 22:13:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 22:13:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash -411680861, now seen corresponding path program 2 times [2021-08-12 22:13:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 22:13:11,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719478538] [2021-08-12 22:13:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 22:13:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 22:13:12,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 22:13:12,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-12 22:13:12,015 INFO L142 QuantifierPusher]: treesize reduction 27, result has 79.5 percent of original size [2021-08-12 22:13:12,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-08-12 22:13:12,159 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-08-12 22:13:12,177 INFO L142 QuantifierPusher]: treesize reduction 28, result has 56.9 percent of original size [2021-08-12 22:13:12,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-08-12 22:13:12,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 22:13:12,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-12 22:13:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 22:13:12,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 22:13:12,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719478538] [2021-08-12 22:13:12,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719478538] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 22:13:12,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 22:13:12,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 22:13:12,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887867083] [2021-08-12 22:13:12,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 22:13:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 22:13:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 22:13:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 22:13:12,199 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-08-12 22:13:12,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-08-12 22:13:12,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 22:13:12,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-08-12 22:13:12,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 22:13:12,254 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-08-12 22:13:12,254 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-12 22:13:12,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 14 events. 0/14 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-12 22:13:12,254 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-08-12 22:13:12,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 48 flow [2021-08-12 22:13:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 22:13:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-12 22:13:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-08-12 22:13:12,256 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-08-12 22:13:12,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-08-12 22:13:12,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-08-12 22:13:12,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 22:13:12,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-08-12 22:13:12,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-08-12 22:13:12,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2021-08-12 22:13:12,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2021-08-12 22:13:12,260 INFO L348 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2021-08-12 22:13:12,261 INFO L482 AbstractCegarLoop]: Abstraction has has 21 places, 10 transitions, 48 flow [2021-08-12 22:13:12,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-08-12 22:13:12,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 22:13:12,292 INFO L742 CegarLoopForPetriNet]: Computed Owicki-Gries annotation of size 3144 in 25512317ns [2021-08-12 22:13:12,297 INFO L113 kiGriesValidityCheck]: 12#(or (and (not v_np15_1) v_np14_1 v_np16_1 (or (and sort_label_is_null_3 sort_label_is_null_1) (and (or (and (not sort_label_is_null_3) (not sort_label_is_null_1)) (and (or (not sort_label_is_null_3) (= (+ result_5 1) 0)) (or sort_label_is_null_3 (= result_5 1)))) (or (= sort_label_2 (+ result_5 sort_label_0)) (and (or (not sort_label_is_null_3) (not sort_label_is_null_1)) (or sort_label_is_null_3 sort_label_is_null_1))))) (not v_np5_1) (not v_np7_1) v_np2_1 (not v_np3_1) (not v_np9_1) (or (= result_5 0) (and (or (not sort_label_is_null_3) (not sort_label_is_null_1)) (or sort_label_is_null_3 sort_label_is_null_1)) (not sort_label_is_null_1)) (not v_np0_1) v_np8_1 v_np11_1 (not v_np1_1) (not v_np6_1) (not v_np12_1) (not v_np13_1) (not v_np4_1) (not v_np10_1)) (and (not v_np15_1) (not v_np2_1) v_np14_1 v_np16_1 (not v_np5_1) (not v_np7_1) (not v_np3_1) (not v_np9_1) v_np6_1 (not v_np0_1) v_np8_1 v_np11_1 (not v_np1_1) (not v_np12_1) (not v_np13_1) (not v_np4_1) (not v_np10_1)) (and (not v_np16_1) (not v_np2_1) v_np14_1 v_np15_1 (not v_np7_1) (not v_np3_1) (not v_np9_1) v_np5_1 (not v_np8_1) (not v_np0_1) v_np11_1 (not v_np1_1) (not v_np6_1) (not v_np4_1) (not v_np12_1) (not v_np13_1) (not v_np10_1)) (and (not v_np15_1) (not v_np2_1) v_np14_1 v_np16_1 (or (and sort_label_is_null_3 sort_label_is_null_1) (and (or (and (not sort_label_is_null_3) (not sort_label_is_null_1)) (and (or (not sort_label_is_null_3) (= (+ result_5 1) 0)) (or sort_label_is_null_3 (= result_5 1)))) (or (= sort_label_2 (+ result_5 sort_label_0)) (and (or (not sort_label_is_null_3) (not sort_label_is_null_1)) (or sort_label_is_null_3 sort_label_is_null_1))))) (not v_np5_1) (not v_np7_1) (not v_np3_1) (not v_np9_1) (or (= result_5 0) (and (or (not sort_label_is_null_3) (not sort_label_is_null_1)) (or sort_label_is_null_3 sort_label_is_null_1)) (not sort_label_is_null_1)) v_np8_1 v_np11_1 (not v_np1_1) (not v_np6_1) (not v_np12_1) (not v_np13_1) (not v_np4_1) v_np0_1 (not v_np10_1))) [2021-08-12 22:13:12,320 INFO L748 CegarLoopForPetriNet]: Checked inductivity and non-interference of Owicki-Gries annotation in 31318363ns [2021-08-12 22:13:12,321 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Invalid Owicki-Gries annotation at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.computeOwickiGries(CegarLoopForPetriNet.java:752) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:285) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:161) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:146) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-12 22:13:12,330 INFO L168 Benchmark]: Toolchain (without parser) took 1293.82 ms. Allocated memory is still 187.7 MB. Free memory was 167.6 MB in the beginning and 168.6 MB in the end (delta: -962.7 kB). Peak memory consumption was 1.4 MB. Max. memory is 8.0 GB. [2021-08-12 22:13:12,331 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 187.7 MB. Free memory was 168.7 MB in the beginning and 168.6 MB in the end (delta: 117.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 22:13:12,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.13 ms. Allocated memory is still 187.7 MB. Free memory was 167.6 MB in the beginning and 166.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-12 22:13:12,337 INFO L168 Benchmark]: Boogie Preprocessor took 9.83 ms. Allocated memory is still 187.7 MB. Free memory was 166.1 MB in the beginning and 165.3 MB in the end (delta: 805.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 22:13:12,338 INFO L168 Benchmark]: RCFGBuilder took 192.81 ms. Allocated memory is still 187.7 MB. Free memory was 165.1 MB in the beginning and 155.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-12 22:13:12,338 INFO L168 Benchmark]: TraceAbstraction took 1065.40 ms. Allocated memory is still 187.7 MB. Free memory was 155.3 MB in the beginning and 168.6 MB in the end (delta: -13.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 22:13:12,343 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 187.7 MB. Free memory was 168.7 MB in the beginning and 168.6 MB in the end (delta: 117.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.13 ms. Allocated memory is still 187.7 MB. Free memory was 167.6 MB in the beginning and 166.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.83 ms. Allocated memory is still 187.7 MB. Free memory was 166.1 MB in the beginning and 165.3 MB in the end (delta: 805.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 192.81 ms. Allocated memory is still 187.7 MB. Free memory was 165.1 MB in the beginning and 155.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1065.40 ms. Allocated memory is still 187.7 MB. Free memory was 155.3 MB in the beginning and 168.6 MB in the end (delta: -13.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Invalid Owicki-Gries annotation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Invalid Owicki-Gries annotation: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.computeOwickiGries(CegarLoopForPetriNet.java:752) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...