/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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:04:13,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:04:13,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:04:13,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:04:13,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:04:13,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:04:13,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:04:13,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:04:13,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:04:13,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:04:13,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:04:13,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:04:13,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:04:13,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:04:13,240 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:04:13,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:04:13,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:04:13,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:04:13,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:04:13,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:04:13,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:04:13,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:04:13,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:04:13,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:04:13,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:04:13,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:04:13,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:04:13,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:04:13,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:04:13,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:04:13,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:04:13,244 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:04:13,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:04:13,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:04:13,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:04:13,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:04:13,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:04:13,518 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:04:13,521 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:04:13,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl [2021-06-12 20:04:13,522 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl' [2021-06-12 20:04:13,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:04:13,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:04:13,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:04:13,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:04:13,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:04:13,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:04:13,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:04:13,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:04:13,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:04:13,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/1) ... [2021-06-12 20:04:13,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:04:13,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:04:13,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:04:13,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:04:13,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (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 [2021-06-12 20:04:13,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:04:13,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:04:13,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:04:13,666 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:04:13,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:04:13,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:04:13,666 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:04:13,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:04:13,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:04:13,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:04:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:04:13,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:04:13,671 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:04:13,797 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:04:13,797 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:04:13,798 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:04:13 BoogieIcfgContainer [2021-06-12 20:04:13,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:04:13,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:04:13,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:04:13,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:04:13,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:04:13" (1/2) ... [2021-06-12 20:04:13,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcc8229 and model type match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:04:13, skipping insertion in model container [2021-06-12 20:04:13,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:04:13" (2/2) ... [2021-06-12 20:04:13,805 INFO L111 eAbstractionObserver]: Analyzing ICFG match-subst.wvr.bpl [2021-06-12 20:04:13,809 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:04:13,809 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:04:13,809 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:04:13,810 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:04:13,846 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 20:04:13,864 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 20:04:13,881 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:04:13,881 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:04:13,881 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:04:13,881 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:04:13,881 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:04:13,881 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:04:13,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:04:13,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:04:13,889 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-06-12 20:04:13,911 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 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) [2021-06-12 20:04:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 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) [2021-06-12 20:04:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:04:13,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:13,932 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:13,932 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1166045766, now seen corresponding path program 1 times [2021-06-12 20:04:13,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882416945] [2021-06-12 20:04:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:14,451 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 50 [2021-06-12 20:04:14,686 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-06-12 20:04:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882416945] [2021-06-12 20:04:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882416945] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:04:14,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:04:14,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:04:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96770178] [2021-06-12 20:04:14,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:04:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:04:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:04:14,859 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:15,130 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:04:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,148 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-12 20:04:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:04:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-12 20:04:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,160 INFO L225 Difference]: With dead ends: 98 [2021-06-12 20:04:15,161 INFO L226 Difference]: Without dead ends: 72 [2021-06-12 20:04:15,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:04:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-12 20:04:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-06-12 20:04:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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) [2021-06-12 20:04:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-06-12 20:04:15,203 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-06-12 20:04:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,204 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-06-12 20:04:15,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-06-12 20:04:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:04:15,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,206 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:15,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:04:15,207 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957754, now seen corresponding path program 2 times [2021-06-12 20:04:15,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:15,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891356826] [2021-06-12 20:04:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:15,535 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-06-12 20:04:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:15,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891356826] [2021-06-12 20:04:15,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891356826] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:04:15,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:04:15,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:04:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220750387] [2021-06-12 20:04:15,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:04:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:04:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:04:15,685 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:15,893 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:04:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,915 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-06-12 20:04:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:04:15,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-12 20:04:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,917 INFO L225 Difference]: With dead ends: 93 [2021-06-12 20:04:15,917 INFO L226 Difference]: Without dead ends: 65 [2021-06-12 20:04:15,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:04:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-12 20:04:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-06-12 20:04:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 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) [2021-06-12 20:04:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-06-12 20:04:15,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-06-12 20:04:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,932 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-06-12 20:04:15,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-06-12 20:04:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:04:15,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,933 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:15,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:04:15,933 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675270, now seen corresponding path program 3 times [2021-06-12 20:04:15,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:15,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189269729] [2021-06-12 20:04:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189269729] [2021-06-12 20:04:16,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189269729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:04:16,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:04:16,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:04:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071630442] [2021-06-12 20:04:16,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:04:16,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:04:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:04:16,213 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:16,428 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:04:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:16,434 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-06-12 20:04:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:04:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-12 20:04:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:16,435 INFO L225 Difference]: With dead ends: 80 [2021-06-12 20:04:16,436 INFO L226 Difference]: Without dead ends: 54 [2021-06-12 20:04:16,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:04:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-12 20:04:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-06-12 20:04:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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) [2021-06-12 20:04:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-06-12 20:04:16,439 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-06-12 20:04:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:16,440 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-06-12 20:04:16,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-06-12 20:04:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:04:16,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:16,440 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:16,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:04:16,441 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578024, now seen corresponding path program 4 times [2021-06-12 20:04:16,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:16,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363927109] [2021-06-12 20:04:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:16,616 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-06-12 20:04:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363927109] [2021-06-12 20:04:16,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363927109] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:04:16,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:04:16,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:04:16,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848807793] [2021-06-12 20:04:16,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:04:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:04:16,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:04:16,731 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:16,919 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-06-12 20:04:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:04:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-12 20:04:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:16,921 INFO L225 Difference]: With dead ends: 56 [2021-06-12 20:04:16,921 INFO L226 Difference]: Without dead ends: 33 [2021-06-12 20:04:16,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:04:16,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-12 20:04:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-06-12 20:04:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2021-06-12 20:04:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-06-12 20:04:16,928 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-06-12 20:04:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:16,928 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-06-12 20:04:16,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-06-12 20:04:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:04:16,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:16,930 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:16,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:04:16,930 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:16,931 INFO L82 PathProgramCache]: Analyzing trace with hash 531109224, now seen corresponding path program 5 times [2021-06-12 20:04:16,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:16,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172372300] [2021-06-12 20:04:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:17,183 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-12 20:04:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:17,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172372300] [2021-06-12 20:04:17,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172372300] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:04:17,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:04:17,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:04:17,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866241569] [2021-06-12 20:04:17,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:04:17,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:17,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:04:17,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:04:17,297 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:17,515 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:04:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:17,519 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-06-12 20:04:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:04:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-12 20:04:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:17,520 INFO L225 Difference]: With dead ends: 48 [2021-06-12 20:04:17,520 INFO L226 Difference]: Without dead ends: 27 [2021-06-12 20:04:17,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:04:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-06-12 20:04:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-06-12 20:04:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2021-06-12 20:04:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-06-12 20:04:17,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-06-12 20:04:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-06-12 20:04:17,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-06-12 20:04:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:04:17,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:17,524 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:17,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:04:17,524 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:17,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:17,524 INFO L82 PathProgramCache]: Analyzing trace with hash 202726342, now seen corresponding path program 6 times [2021-06-12 20:04:17,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:17,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427085917] [2021-06-12 20:04:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:17,750 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-12 20:04:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:17,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427085917] [2021-06-12 20:04:17,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427085917] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:04:17,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:04:17,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:04:17,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33292971] [2021-06-12 20:04:17,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:04:17,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:04:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:04:17,863 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:18,017 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-06-12 20:04:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:04:18,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-12 20:04:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:18,017 INFO L225 Difference]: With dead ends: 25 [2021-06-12 20:04:18,017 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 20:04:18,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:04:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 20:04:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 20:04:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-06-12 20:04:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 20:04:18,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-06-12 20:04:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:18,018 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 20:04:18,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-06-12 20:04:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 20:04:18,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:04:18,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:04:18,021 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:04:18,023 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:04:18 BasicIcfg [2021-06-12 20:04:18,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:04:18,024 INFO L168 Benchmark]: Toolchain (without parser) took 4460.49 ms. Allocated memory was 206.6 MB in the beginning and 283.1 MB in the end (delta: 76.5 MB). Free memory was 186.8 MB in the beginning and 177.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 87.3 MB. Max. memory is 8.0 GB. [2021-06-12 20:04:18,024 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 206.6 MB. Free memory is still 187.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:04:18,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.26 ms. Allocated memory is still 206.6 MB. Free memory was 186.7 MB in the beginning and 185.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:04:18,025 INFO L168 Benchmark]: Boogie Preprocessor took 21.68 ms. Allocated memory is still 206.6 MB. Free memory was 185.2 MB in the beginning and 184.2 MB in the end (delta: 955.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:04:18,025 INFO L168 Benchmark]: RCFGBuilder took 187.18 ms. Allocated memory is still 206.6 MB. Free memory was 184.1 MB in the beginning and 173.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:04:18,026 INFO L168 Benchmark]: TraceAbstraction took 4223.36 ms. Allocated memory was 206.6 MB in the beginning and 283.1 MB in the end (delta: 76.5 MB). Free memory was 173.0 MB in the beginning and 177.0 MB in the end (delta: -4.0 MB). Peak memory consumption was 73.7 MB. Max. memory is 8.0 GB. [2021-06-12 20:04:18,028 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 206.6 MB. Free memory is still 187.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.26 ms. Allocated memory is still 206.6 MB. Free memory was 186.7 MB in the beginning and 185.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.68 ms. Allocated memory is still 206.6 MB. Free memory was 185.2 MB in the beginning and 184.2 MB in the end (delta: 955.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 187.18 ms. Allocated memory is still 206.6 MB. Free memory was 184.1 MB in the beginning and 173.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4223.36 ms. Allocated memory was 206.6 MB in the beginning and 283.1 MB in the end (delta: 76.5 MB). Free memory was 173.0 MB in the beginning and 177.0 MB in the end (delta: -4.0 MB). Peak memory consumption was 73.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4140.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 24.5ms, AutomataDifference: 1352.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2614.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.6ms SsaConstructionTime, 135.6ms SatisfiabilityAnalysisTime, 2361.7ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3392 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...