/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/parallel/misc-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:32:09,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:32:09,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:32:09,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:32:09,267 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 20:32:09,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:32:09,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:32:09,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:32:09,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:32:09,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:32:09,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:32:09,289 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:32:09,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:32:09,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:32:09,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:32:09,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:32:09,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:32:09,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:32:09,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:32:09,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:32:09,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:32:09,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:32:09,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:32:09,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:32:09,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:32:09,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:32:09,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:32:09,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:32:09,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:32:09,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:32:09,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:32:09,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:32:09,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:32:09,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:32:09,578 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:32:09,579 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:32:09,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl [2021-06-12 20:32:09,580 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl' [2021-06-12 20:32:09,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:32:09,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:32:09,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:32:09,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:32:09,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:32:09,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:32:09,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:32:09,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:32:09,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:32:09,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/1) ... [2021-06-12 20:32:09,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:32:09,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:32:09,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:32:09,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:32:09,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (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 20:32:09,731 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:32:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:32:09,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:32:09,731 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:32:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:32:09,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:32:09,732 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:32:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:32:09,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:32:09,732 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:32:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:32:09,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:32:09,733 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 20:32:09,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:32:09,925 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:32:09,926 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:32:09 BoogieIcfgContainer [2021-06-12 20:32:09,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:32:09,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:32:09,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:32:09,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:32:09,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:32:09" (1/2) ... [2021-06-12 20:32:09,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d07613 and model type misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:32:09, skipping insertion in model container [2021-06-12 20:32:09,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:32:09" (2/2) ... [2021-06-12 20:32:09,940 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-4.wvr.bpl [2021-06-12 20:32:09,945 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:32:09,946 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:32:09,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:32:09,947 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:32:10,035 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 20:32:10,060 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 20:32:10,093 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:32:10,094 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:32:10,094 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:32:10,094 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:32:10,094 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:32:10,094 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:32:10,094 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:32:10,094 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:32:10,124 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 31 transitions, 86 flow [2021-06-12 20:32:10,161 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 233 states, 231 states have (on average 2.9437229437229435) internal successors, (680), 232 states have internal predecessors, (680), 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 20:32:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 231 states have (on average 2.9437229437229435) internal successors, (680), 232 states have internal predecessors, (680), 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 20:32:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:32:10,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:10,193 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:10,194 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash -155015942, now seen corresponding path program 1 times [2021-06-12 20:32:10,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:10,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169473871] [2021-06-12 20:32:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:10,340 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 20:32:10,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:10,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169473871] [2021-06-12 20:32:10,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169473871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:32:10,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:32:10,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:32:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590715785] [2021-06-12 20:32:10,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:32:10,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:32:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:32:10,367 INFO L87 Difference]: Start difference. First operand has 233 states, 231 states have (on average 2.9437229437229435) internal successors, (680), 232 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 20:32:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:10,432 INFO L93 Difference]: Finished difference Result 273 states and 758 transitions. [2021-06-12 20:32:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:32:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 20:32:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:10,443 INFO L225 Difference]: With dead ends: 273 [2021-06-12 20:32:10,444 INFO L226 Difference]: Without dead ends: 173 [2021-06-12 20:32:10,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:32:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-12 20:32:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-06-12 20:32:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.7209302325581395) internal successors, (468), 172 states have internal predecessors, (468), 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 20:32:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 468 transitions. [2021-06-12 20:32:10,489 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 468 transitions. Word has length 14 [2021-06-12 20:32:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:10,489 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 468 transitions. [2021-06-12 20:32:10,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 20:32:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 468 transitions. [2021-06-12 20:32:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:32:10,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:10,491 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:10,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:32:10,492 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash 126261564, now seen corresponding path program 2 times [2021-06-12 20:32:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:10,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164088206] [2021-06-12 20:32:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:10,525 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 20:32:10,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:10,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164088206] [2021-06-12 20:32:10,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164088206] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:32:10,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:32:10,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:32:10,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553801941] [2021-06-12 20:32:10,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:32:10,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:32:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:32:10,527 INFO L87 Difference]: Start difference. First operand 173 states and 468 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 20:32:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:10,569 INFO L93 Difference]: Finished difference Result 310 states and 842 transitions. [2021-06-12 20:32:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:32:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 20:32:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:10,572 INFO L225 Difference]: With dead ends: 310 [2021-06-12 20:32:10,574 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 20:32:10,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:32:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 20:32:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-06-12 20:32:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 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 20:32:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-06-12 20:32:10,595 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 14 [2021-06-12 20:32:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:10,595 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-06-12 20:32:10,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 20:32:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-06-12 20:32:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:32:10,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:10,598 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:10,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:32:10,598 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1896035202, now seen corresponding path program 1 times [2021-06-12 20:32:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:10,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109324956] [2021-06-12 20:32:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:10,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109324956] [2021-06-12 20:32:10,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109324956] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:32:10,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:32:10,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:32:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697439078] [2021-06-12 20:32:10,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:32:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:32:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:32:10,622 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:32:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:10,638 INFO L93 Difference]: Finished difference Result 369 states and 981 transitions. [2021-06-12 20:32:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:32:10,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-06-12 20:32:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:10,648 INFO L225 Difference]: With dead ends: 369 [2021-06-12 20:32:10,648 INFO L226 Difference]: Without dead ends: 369 [2021-06-12 20:32:10,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:32:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-12 20:32:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 284. [2021-06-12 20:32:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7597173144876326) internal successors, (781), 283 states have internal predecessors, (781), 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 20:32:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 781 transitions. [2021-06-12 20:32:10,676 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 781 transitions. Word has length 18 [2021-06-12 20:32:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:10,676 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 781 transitions. [2021-06-12 20:32:10,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:32:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 781 transitions. [2021-06-12 20:32:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:32:10,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:10,679 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:10,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:32:10,680 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1748425536, now seen corresponding path program 1 times [2021-06-12 20:32:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:10,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154296085] [2021-06-12 20:32:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:10,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:10,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154296085] [2021-06-12 20:32:10,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154296085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:32:10,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:32:10,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:32:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808718103] [2021-06-12 20:32:10,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:32:10,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:32:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:32:10,698 INFO L87 Difference]: Start difference. First operand 284 states and 781 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:32:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:10,708 INFO L93 Difference]: Finished difference Result 432 states and 1157 transitions. [2021-06-12 20:32:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:32:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-06-12 20:32:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:10,711 INFO L225 Difference]: With dead ends: 432 [2021-06-12 20:32:10,711 INFO L226 Difference]: Without dead ends: 432 [2021-06-12 20:32:10,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:32:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-12 20:32:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 348. [2021-06-12 20:32:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7636887608069163) internal successors, (959), 347 states have internal predecessors, (959), 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 20:32:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 959 transitions. [2021-06-12 20:32:10,735 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 959 transitions. Word has length 18 [2021-06-12 20:32:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:10,735 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 959 transitions. [2021-06-12 20:32:10,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:32:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 959 transitions. [2021-06-12 20:32:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:32:10,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:10,738 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:10,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:32:10,738 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:10,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1245940290, now seen corresponding path program 1 times [2021-06-12 20:32:10,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:10,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109264500] [2021-06-12 20:32:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:10,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:10,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109264500] [2021-06-12 20:32:10,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109264500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:10,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914275755] [2021-06-12 20:32:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:32:10,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:10,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914275755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:10,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:10,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:32:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400801235] [2021-06-12 20:32:10,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:32:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:32:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:32:10,902 INFO L87 Difference]: Start difference. First operand 348 states and 959 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 20:32:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:10,979 INFO L93 Difference]: Finished difference Result 665 states and 1852 transitions. [2021-06-12 20:32:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:32:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-06-12 20:32:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:10,992 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:32:10,992 INFO L226 Difference]: Without dead ends: 509 [2021-06-12 20:32:10,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:32:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-12 20:32:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 408. [2021-06-12 20:32:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7764127764127764) internal successors, (1130), 407 states have internal predecessors, (1130), 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 20:32:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1130 transitions. [2021-06-12 20:32:11,025 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1130 transitions. Word has length 22 [2021-06-12 20:32:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:11,025 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1130 transitions. [2021-06-12 20:32:11,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 20:32:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1130 transitions. [2021-06-12 20:32:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:32:11,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:11,027 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:11,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:11,240 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1294560668, now seen corresponding path program 1 times [2021-06-12 20:32:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:11,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728097543] [2021-06-12 20:32:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:11,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728097543] [2021-06-12 20:32:11,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728097543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:11,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220407783] [2021-06-12 20:32:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:32:11,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:11,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220407783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:11,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:11,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:32:11,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533341724] [2021-06-12 20:32:11,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:32:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:32:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:32:11,440 INFO L87 Difference]: Start difference. First operand 408 states and 1130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 20:32:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:11,502 INFO L93 Difference]: Finished difference Result 873 states and 2457 transitions. [2021-06-12 20:32:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:32:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-06-12 20:32:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:11,507 INFO L225 Difference]: With dead ends: 873 [2021-06-12 20:32:11,507 INFO L226 Difference]: Without dead ends: 717 [2021-06-12 20:32:11,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:32:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-12 20:32:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 697. [2021-06-12 20:32:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8117816091954024) internal successors, (1957), 696 states have internal predecessors, (1957), 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 20:32:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1957 transitions. [2021-06-12 20:32:11,540 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1957 transitions. Word has length 22 [2021-06-12 20:32:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:11,540 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1957 transitions. [2021-06-12 20:32:11,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 20:32:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1957 transitions. [2021-06-12 20:32:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:32:11,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:11,543 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:11,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:11,765 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1519255610, now seen corresponding path program 2 times [2021-06-12 20:32:11,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:11,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478877840] [2021-06-12 20:32:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:32:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:11,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478877840] [2021-06-12 20:32:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478877840] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:32:11,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:32:11,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:32:11,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118397906] [2021-06-12 20:32:11,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:32:11,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:32:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:32:11,788 INFO L87 Difference]: Start difference. First operand 697 states and 1957 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 20:32:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:11,802 INFO L93 Difference]: Finished difference Result 873 states and 2302 transitions. [2021-06-12 20:32:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:32:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 26 [2021-06-12 20:32:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:11,806 INFO L225 Difference]: With dead ends: 873 [2021-06-12 20:32:11,806 INFO L226 Difference]: Without dead ends: 873 [2021-06-12 20:32:11,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:32:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-12 20:32:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 671. [2021-06-12 20:32:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.662686567164179) internal successors, (1784), 670 states have internal predecessors, (1784), 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 20:32:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1784 transitions. [2021-06-12 20:32:11,827 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1784 transitions. Word has length 26 [2021-06-12 20:32:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:11,827 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1784 transitions. [2021-06-12 20:32:11,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 20:32:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1784 transitions. [2021-06-12 20:32:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:32:11,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:11,830 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:11,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:32:11,830 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1163376152, now seen corresponding path program 2 times [2021-06-12 20:32:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:11,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614055299] [2021-06-12 20:32:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:32:11,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:11,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614055299] [2021-06-12 20:32:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614055299] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:32:11,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:32:11,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:32:11,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252913689] [2021-06-12 20:32:11,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:32:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:32:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:32:11,862 INFO L87 Difference]: Start difference. First operand 671 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 20:32:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:11,878 INFO L93 Difference]: Finished difference Result 803 states and 1991 transitions. [2021-06-12 20:32:11,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:32:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 26 [2021-06-12 20:32:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:11,882 INFO L225 Difference]: With dead ends: 803 [2021-06-12 20:32:11,882 INFO L226 Difference]: Without dead ends: 803 [2021-06-12 20:32:11,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:32:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-12 20:32:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 679. [2021-06-12 20:32:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.5250737463126844) internal successors, (1712), 678 states have internal predecessors, (1712), 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 20:32:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1712 transitions. [2021-06-12 20:32:11,900 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1712 transitions. Word has length 26 [2021-06-12 20:32:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:11,900 INFO L482 AbstractCegarLoop]: Abstraction has 679 states and 1712 transitions. [2021-06-12 20:32:11,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 20:32:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1712 transitions. [2021-06-12 20:32:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:32:11,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:11,903 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:11,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:32:11,904 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2034206836, now seen corresponding path program 1 times [2021-06-12 20:32:11,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032281166] [2021-06-12 20:32:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:12,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:12,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032281166] [2021-06-12 20:32:12,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032281166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:12,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982025221] [2021-06-12 20:32:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:32:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:12,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982025221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:12,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:12,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:32:12,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941120630] [2021-06-12 20:32:12,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:32:12,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:12,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:32:12,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:32:12,187 INFO L87 Difference]: Start difference. First operand 679 states and 1712 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 20:32:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:12,254 INFO L93 Difference]: Finished difference Result 1111 states and 2808 transitions. [2021-06-12 20:32:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:32:12,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2021-06-12 20:32:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:12,261 INFO L225 Difference]: With dead ends: 1111 [2021-06-12 20:32:12,262 INFO L226 Difference]: Without dead ends: 935 [2021-06-12 20:32:12,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-12 20:32:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 478. [2021-06-12 20:32:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.542976939203354) internal successors, (1213), 477 states have internal predecessors, (1213), 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 20:32:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1213 transitions. [2021-06-12 20:32:12,278 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1213 transitions. Word has length 30 [2021-06-12 20:32:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:12,278 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1213 transitions. [2021-06-12 20:32:12,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 20:32:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1213 transitions. [2021-06-12 20:32:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:32:12,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:12,281 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:12,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:12,497 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash 794142476, now seen corresponding path program 2 times [2021-06-12 20:32:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:12,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549924854] [2021-06-12 20:32:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:12,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549924854] [2021-06-12 20:32:12,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549924854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437872631] [2021-06-12 20:32:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:12,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:32:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:12,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437872631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:12,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:12,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:32:12,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634586450] [2021-06-12 20:32:12,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:32:12,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:32:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:32:12,681 INFO L87 Difference]: Start difference. First operand 478 states and 1213 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 20:32:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:12,752 INFO L93 Difference]: Finished difference Result 458 states and 1138 transitions. [2021-06-12 20:32:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:32:12,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 30 [2021-06-12 20:32:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:12,753 INFO L225 Difference]: With dead ends: 458 [2021-06-12 20:32:12,753 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 20:32:12,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:32:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 20:32:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 20:32:12,753 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 20:32:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 20:32:12,754 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-06-12 20:32:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:12,754 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 20:32:12,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 20:32:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 20:32:12,754 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:32:12,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:12,978 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:32:12,980 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:32:12 BasicIcfg [2021-06-12 20:32:12,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:32:12,980 INFO L168 Benchmark]: Toolchain (without parser) took 3338.07 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 162.3 MB in the beginning and 121.0 MB in the end (delta: 41.3 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:12,980 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:32:12,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.28 ms. Allocated memory is still 181.4 MB. Free memory was 162.3 MB in the beginning and 160.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:12,981 INFO L168 Benchmark]: Boogie Preprocessor took 12.96 ms. Allocated memory is still 181.4 MB. Free memory was 160.9 MB in the beginning and 160.0 MB in the end (delta: 916.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:12,981 INFO L168 Benchmark]: RCFGBuilder took 243.30 ms. Allocated memory is still 181.4 MB. Free memory was 159.8 MB in the beginning and 148.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:12,981 INFO L168 Benchmark]: TraceAbstraction took 3051.91 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 148.3 MB in the beginning and 121.0 MB in the end (delta: 27.3 MB). Peak memory consumption was 64.4 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:12,981 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 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.28 ms. Allocated memory is still 181.4 MB. Free memory was 162.3 MB in the beginning and 160.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.96 ms. Allocated memory is still 181.4 MB. Free memory was 160.9 MB in the beginning and 160.0 MB in the end (delta: 916.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 243.30 ms. Allocated memory is still 181.4 MB. Free memory was 159.8 MB in the beginning and 148.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3051.91 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 148.3 MB in the beginning and 121.0 MB in the end (delta: 27.3 MB). Peak memory consumption was 64.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 62]: 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, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2885.5ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 50.5ms, AutomataDifference: 534.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 66.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 282 SDtfs, 340 SDslu, 340 SDs, 0 SdLazy, 183 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 197.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 189.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=697occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 220.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 1073 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.1ms SsaConstructionTime, 133.5ms SatisfiabilityAnalysisTime, 704.3ms InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 574 SizeOfPredicates, 4 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 66/88 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...