/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-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:31:46,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:31:46,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:31:46,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:31:46,198 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 20:31:46,218 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:31:46,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:31:46,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:31:46,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:31:46,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:31:46,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:31:46,220 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:31:46,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:31:46,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:31:46,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:31:46,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:31:46,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:31:46,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:31:46,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:31:46,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:31:46,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:31:46,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:31:46,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:31:46,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:31:46,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:31:46,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:31:46,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:31:46,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:31:46,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:31:46,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:31:46,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:31:46,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:31:46,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:31:46,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:31:46,225 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:31:46,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:31:46,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:31:46,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:31:46,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:31:46,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:31:46,548 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:31:46,549 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:31:46,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl [2021-06-12 20:31:46,550 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-06-12 20:31:46,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:31:46,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:31:46,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:31:46,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:31:46,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:31:46,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:31:46,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:31:46,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:31:46,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:31:46,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/1) ... [2021-06-12 20:31:46,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:31:46,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:31:46,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:31:46,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:31:46,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (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 20:31:46,709 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:31:46,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:31:46,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:31:46,710 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:31:46,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:31:46,711 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:31:46,711 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:31:46,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:31:46,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:31:46,711 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:31:46,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:31:46,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:31:46,713 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 20:31:46,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:31:46,951 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:31:46,952 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:31:46 BoogieIcfgContainer [2021-06-12 20:31:46,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:31:46,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:31:46,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:31:46,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:31:46,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:31:46" (1/2) ... [2021-06-12 20:31:46,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38abda5d and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:31:46, skipping insertion in model container [2021-06-12 20:31:46,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:31:46" (2/2) ... [2021-06-12 20:31:46,958 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-06-12 20:31:46,963 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:31:46,963 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:31:46,963 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:31:46,964 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:31:47,003 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 20:31:47,020 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 20:31:47,036 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:31:47,036 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:31:47,036 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:31:47,036 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:31:47,036 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:31:47,036 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:31:47,037 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:31:47,037 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:31:47,045 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-06-12 20:31:47,169 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 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 20:31:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 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 20:31:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:31:47,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:47,198 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:47,199 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash -932509886, now seen corresponding path program 1 times [2021-06-12 20:31:47,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:47,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710374156] [2021-06-12 20:31:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:47,346 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 20:31:47,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:47,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710374156] [2021-06-12 20:31:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710374156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:31:47,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:31:47,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:31:47,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794245199] [2021-06-12 20:31:47,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:31:47,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:31:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:47,373 INFO L87 Difference]: Start difference. First operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:47,443 INFO L93 Difference]: Finished difference Result 1005 states and 3886 transitions. [2021-06-12 20:31:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:31:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:31:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:47,474 INFO L225 Difference]: With dead ends: 1005 [2021-06-12 20:31:47,474 INFO L226 Difference]: Without dead ends: 1005 [2021-06-12 20:31:47,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-12 20:31:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2021-06-12 20:31:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.8705179282868527) internal successors, (3886), 1004 states have internal predecessors, (3886), 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 20:31:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3886 transitions. [2021-06-12 20:31:47,592 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3886 transitions. Word has length 15 [2021-06-12 20:31:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:47,592 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3886 transitions. [2021-06-12 20:31:47,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3886 transitions. [2021-06-12 20:31:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:31:47,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:47,598 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:47,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:31:47,599 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash -406691327, now seen corresponding path program 1 times [2021-06-12 20:31:47,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:47,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462051844] [2021-06-12 20:31:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:47,634 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 20:31:47,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:47,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462051844] [2021-06-12 20:31:47,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462051844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:31:47,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:31:47,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:31:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87722879] [2021-06-12 20:31:47,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:31:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:31:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:47,638 INFO L87 Difference]: Start difference. First operand 1005 states and 3886 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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 20:31:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:47,666 INFO L93 Difference]: Finished difference Result 1114 states and 4276 transitions. [2021-06-12 20:31:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:31:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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 21 [2021-06-12 20:31:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:47,676 INFO L225 Difference]: With dead ends: 1114 [2021-06-12 20:31:47,677 INFO L226 Difference]: Without dead ends: 1114 [2021-06-12 20:31:47,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-12 20:31:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-12 20:31:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8418688230008984) internal successors, (4276), 1113 states have internal predecessors, (4276), 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 20:31:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4276 transitions. [2021-06-12 20:31:47,721 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4276 transitions. Word has length 21 [2021-06-12 20:31:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:47,721 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4276 transitions. [2021-06-12 20:31:47,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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 20:31:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4276 transitions. [2021-06-12 20:31:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:31:47,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:47,725 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 20:31:47,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:31:47,726 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1420660192, now seen corresponding path program 1 times [2021-06-12 20:31:47,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:47,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325207086] [2021-06-12 20:31:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:47,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:47,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325207086] [2021-06-12 20:31:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325207086] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:31:47,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:31:47,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:31:47,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972334683] [2021-06-12 20:31:47,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:31:47,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:47,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:31:47,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:31:47,762 INFO L87 Difference]: Start difference. First operand 1114 states and 4276 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:47,801 INFO L93 Difference]: Finished difference Result 1550 states and 5618 transitions. [2021-06-12 20:31:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:31:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:31:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:47,812 INFO L225 Difference]: With dead ends: 1550 [2021-06-12 20:31:47,813 INFO L226 Difference]: Without dead ends: 1550 [2021-06-12 20:31:47,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:31:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-12 20:31:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1550. [2021-06-12 20:31:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.6268560361523563) internal successors, (5618), 1549 states have internal predecessors, (5618), 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 20:31:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5618 transitions. [2021-06-12 20:31:47,871 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5618 transitions. Word has length 27 [2021-06-12 20:31:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:47,871 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5618 transitions. [2021-06-12 20:31:47,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5618 transitions. [2021-06-12 20:31:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:31:47,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:47,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:47,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:31:47,879 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash 530548488, now seen corresponding path program 1 times [2021-06-12 20:31:47,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:47,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055156216] [2021-06-12 20:31:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:31:47,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055156216] [2021-06-12 20:31:47,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055156216] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:31:47,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:31:47,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:31:47,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121817491] [2021-06-12 20:31:47,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:31:47,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:47,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:31:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:47,915 INFO L87 Difference]: Start difference. First operand 1550 states and 5618 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 20:31:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:47,969 INFO L93 Difference]: Finished difference Result 1705 states and 6135 transitions. [2021-06-12 20:31:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:31:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 32 [2021-06-12 20:31:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:47,982 INFO L225 Difference]: With dead ends: 1705 [2021-06-12 20:31:47,982 INFO L226 Difference]: Without dead ends: 1705 [2021-06-12 20:31:47,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-12 20:31:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2021-06-12 20:31:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.6003521126760565) internal successors, (6135), 1704 states have internal predecessors, (6135), 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 20:31:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6135 transitions. [2021-06-12 20:31:48,043 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6135 transitions. Word has length 32 [2021-06-12 20:31:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:48,045 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 6135 transitions. [2021-06-12 20:31:48,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 20:31:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6135 transitions. [2021-06-12 20:31:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 20:31:48,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:48,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:48,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:31:48,051 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1222758273, now seen corresponding path program 1 times [2021-06-12 20:31:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:48,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184546843] [2021-06-12 20:31:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:31:48,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:48,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184546843] [2021-06-12 20:31:48,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184546843] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:31:48,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:31:48,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:31:48,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173784584] [2021-06-12 20:31:48,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:31:48,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:31:48,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:31:48,098 INFO L87 Difference]: Start difference. First operand 1705 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 20:31:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:48,125 INFO L93 Difference]: Finished difference Result 2170 states and 7686 transitions. [2021-06-12 20:31:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:31:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 38 [2021-06-12 20:31:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:48,138 INFO L225 Difference]: With dead ends: 2170 [2021-06-12 20:31:48,139 INFO L226 Difference]: Without dead ends: 2170 [2021-06-12 20:31:48,139 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 20:31:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-12 20:31:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2015. [2021-06-12 20:31:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5595829195630584) internal successors, (7169), 2014 states have internal predecessors, (7169), 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 20:31:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7169 transitions. [2021-06-12 20:31:48,197 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7169 transitions. Word has length 38 [2021-06-12 20:31:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:48,198 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7169 transitions. [2021-06-12 20:31:48,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 20:31:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7169 transitions. [2021-06-12 20:31:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 20:31:48,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:48,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:48,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:31:48,206 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1485994045, now seen corresponding path program 1 times [2021-06-12 20:31:48,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:48,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435702648] [2021-06-12 20:31:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:31:48,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:48,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435702648] [2021-06-12 20:31:48,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435702648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083263939] [2021-06-12 20:31:48,252 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 20:31:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:31:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:31:48,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083263939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:48,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:48,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 20:31:48,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629140874] [2021-06-12 20:31:48,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:31:48,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:48,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:31:48,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:31:48,395 INFO L87 Difference]: Start difference. First operand 2015 states and 7169 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 20:31:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:48,458 INFO L93 Difference]: Finished difference Result 2747 states and 9215 transitions. [2021-06-12 20:31:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:31:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 38 [2021-06-12 20:31:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:48,475 INFO L225 Difference]: With dead ends: 2747 [2021-06-12 20:31:48,475 INFO L226 Difference]: Without dead ends: 2747 [2021-06-12 20:31:48,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:31:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-06-12 20:31:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-06-12 20:31:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2746 states have (on average 3.3557902403495996) internal successors, (9215), 2746 states have internal predecessors, (9215), 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 20:31:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 9215 transitions. [2021-06-12 20:31:48,559 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 9215 transitions. Word has length 38 [2021-06-12 20:31:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:48,559 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 9215 transitions. [2021-06-12 20:31:48,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 20:31:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 9215 transitions. [2021-06-12 20:31:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:31:48,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:48,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:48,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-12 20:31:48,789 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1462810483, now seen corresponding path program 1 times [2021-06-12 20:31:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:48,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176273417] [2021-06-12 20:31:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 20:31:48,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:48,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176273417] [2021-06-12 20:31:48,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176273417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:31:48,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:31:48,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:31:48,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705085305] [2021-06-12 20:31:48,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:31:48,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:31:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:31:48,839 INFO L87 Difference]: Start difference. First operand 2747 states and 9215 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 20:31:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:48,869 INFO L93 Difference]: Finished difference Result 3169 states and 10115 transitions. [2021-06-12 20:31:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:31:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 43 [2021-06-12 20:31:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:48,886 INFO L225 Difference]: With dead ends: 3169 [2021-06-12 20:31:48,886 INFO L226 Difference]: Without dead ends: 3169 [2021-06-12 20:31:48,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:31:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-12 20:31:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3169. [2021-06-12 20:31:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.1928661616161618) internal successors, (10115), 3168 states have internal predecessors, (10115), 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 20:31:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 10115 transitions. [2021-06-12 20:31:48,984 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 10115 transitions. Word has length 43 [2021-06-12 20:31:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:48,985 INFO L482 AbstractCegarLoop]: Abstraction has 3169 states and 10115 transitions. [2021-06-12 20:31:48,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 20:31:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 10115 transitions. [2021-06-12 20:31:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:48,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:48,994 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:48,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:31:48,994 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1025488637, now seen corresponding path program 1 times [2021-06-12 20:31:48,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:48,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297817328] [2021-06-12 20:31:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:49,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:49,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297817328] [2021-06-12 20:31:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297817328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:49,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482575688] [2021-06-12 20:31:49,168 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 20:31:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:49,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482575688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:49,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:49,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:31:49,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123455199] [2021-06-12 20:31:49,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:31:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:31:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:31:49,413 INFO L87 Difference]: Start difference. First operand 3169 states and 10115 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 20:31:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:49,484 INFO L93 Difference]: Finished difference Result 5225 states and 16762 transitions. [2021-06-12 20:31:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:31:49,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:49,510 INFO L225 Difference]: With dead ends: 5225 [2021-06-12 20:31:49,511 INFO L226 Difference]: Without dead ends: 5074 [2021-06-12 20:31:49,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:31:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-06-12 20:31:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 4826. [2021-06-12 20:31:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 3.2426943005181346) internal successors, (15646), 4825 states have internal predecessors, (15646), 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 20:31:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 15646 transitions. [2021-06-12 20:31:49,665 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 15646 transitions. Word has length 48 [2021-06-12 20:31:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:49,665 INFO L482 AbstractCegarLoop]: Abstraction has 4826 states and 15646 transitions. [2021-06-12 20:31:49,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 20:31:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 15646 transitions. [2021-06-12 20:31:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:49,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:49,677 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:49,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:49,895 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1806127869, now seen corresponding path program 2 times [2021-06-12 20:31:49,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:49,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474395566] [2021-06-12 20:31:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:49,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474395566] [2021-06-12 20:31:49,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474395566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800617036] [2021-06-12 20:31:49,978 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 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 20:31:50,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800617036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:50,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:50,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:31:50,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741778000] [2021-06-12 20:31:50,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:31:50,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:31:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:31:50,168 INFO L87 Difference]: Start difference. First operand 4826 states and 15646 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 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 20:31:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:50,262 INFO L93 Difference]: Finished difference Result 6962 states and 22532 transitions. [2021-06-12 20:31:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:31:50,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:50,301 INFO L225 Difference]: With dead ends: 6962 [2021-06-12 20:31:50,301 INFO L226 Difference]: Without dead ends: 6313 [2021-06-12 20:31:50,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:31:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-06-12 20:31:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4631. [2021-06-12 20:31:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 3.2323974082073432) internal successors, (14966), 4630 states have internal predecessors, (14966), 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 20:31:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 14966 transitions. [2021-06-12 20:31:50,453 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 14966 transitions. Word has length 48 [2021-06-12 20:31:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:50,453 INFO L482 AbstractCegarLoop]: Abstraction has 4631 states and 14966 transitions. [2021-06-12 20:31:50,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 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 20:31:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 14966 transitions. [2021-06-12 20:31:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:50,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:50,465 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:50,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:50,685 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash 492650975, now seen corresponding path program 3 times [2021-06-12 20:31:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:50,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367171213] [2021-06-12 20:31:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:31:50,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:50,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367171213] [2021-06-12 20:31:50,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367171213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:50,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746594644] [2021-06-12 20:31:50,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 20:31:50,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:31:50,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:31:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746594644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:50,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:50,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:31:50,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241469983] [2021-06-12 20:31:50,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:31:50,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:31:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:31:50,951 INFO L87 Difference]: Start difference. First operand 4631 states and 14966 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 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 20:31:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:51,049 INFO L93 Difference]: Finished difference Result 8195 states and 26626 transitions. [2021-06-12 20:31:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:31:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:51,076 INFO L225 Difference]: With dead ends: 8195 [2021-06-12 20:31:51,076 INFO L226 Difference]: Without dead ends: 7472 [2021-06-12 20:31:51,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:31:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-06-12 20:31:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 6998. [2021-06-12 20:31:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6997 states have (on average 3.2722595398027727) internal successors, (22896), 6997 states have internal predecessors, (22896), 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 20:31:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 22896 transitions. [2021-06-12 20:31:51,277 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 22896 transitions. Word has length 48 [2021-06-12 20:31:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:51,277 INFO L482 AbstractCegarLoop]: Abstraction has 6998 states and 22896 transitions. [2021-06-12 20:31:51,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 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 20:31:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 22896 transitions. [2021-06-12 20:31:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:51,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:51,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:51,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:51,517 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -647503601, now seen corresponding path program 4 times [2021-06-12 20:31:51,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:51,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657586587] [2021-06-12 20:31:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:51,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:51,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657586587] [2021-06-12 20:31:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657586587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717073159] [2021-06-12 20:31:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:51,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:51,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:51,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717073159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:51,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:51,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:31:51,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357664920] [2021-06-12 20:31:51,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:31:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:51,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:31:51,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:51,826 INFO L87 Difference]: Start difference. First operand 6998 states and 22896 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 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 20:31:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:51,941 INFO L93 Difference]: Finished difference Result 9603 states and 31287 transitions. [2021-06-12 20:31:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:31:51,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 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 48 [2021-06-12 20:31:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:51,968 INFO L225 Difference]: With dead ends: 9603 [2021-06-12 20:31:51,968 INFO L226 Difference]: Without dead ends: 8352 [2021-06-12 20:31:51,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-12 20:31:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6644. [2021-06-12 20:31:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6643 states have (on average 3.2599729038085203) internal successors, (21656), 6643 states have internal predecessors, (21656), 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 20:31:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 21656 transitions. [2021-06-12 20:31:52,158 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 21656 transitions. Word has length 48 [2021-06-12 20:31:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:52,158 INFO L482 AbstractCegarLoop]: Abstraction has 6644 states and 21656 transitions. [2021-06-12 20:31:52,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 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 20:31:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 21656 transitions. [2021-06-12 20:31:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:52,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:52,173 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:52,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 20:31:52,396 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1805099289, now seen corresponding path program 5 times [2021-06-12 20:31:52,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:52,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453081807] [2021-06-12 20:31:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:31:52,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453081807] [2021-06-12 20:31:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453081807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165348910] [2021-06-12 20:31:52,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:52,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:31:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:52,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:31:52,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165348910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:52,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:52,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:31:52,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493669588] [2021-06-12 20:31:52,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:31:52,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:31:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:52,647 INFO L87 Difference]: Start difference. First operand 6644 states and 21656 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 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 20:31:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:52,743 INFO L93 Difference]: Finished difference Result 8899 states and 28902 transitions. [2021-06-12 20:31:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:31:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 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 48 [2021-06-12 20:31:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:52,766 INFO L225 Difference]: With dead ends: 8899 [2021-06-12 20:31:52,767 INFO L226 Difference]: Without dead ends: 8464 [2021-06-12 20:31:52,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-06-12 20:31:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 6769. [2021-06-12 20:31:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 3.255171394799054) internal successors, (22031), 6768 states have internal predecessors, (22031), 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 20:31:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 22031 transitions. [2021-06-12 20:31:52,925 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 22031 transitions. Word has length 48 [2021-06-12 20:31:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:52,925 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 22031 transitions. [2021-06-12 20:31:52,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 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 20:31:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 22031 transitions. [2021-06-12 20:31:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:52,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:52,940 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:53,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:53,153 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1316032927, now seen corresponding path program 6 times [2021-06-12 20:31:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:53,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955386519] [2021-06-12 20:31:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 20:31:53,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:53,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955386519] [2021-06-12 20:31:53,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955386519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:53,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653961913] [2021-06-12 20:31:53,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:53,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:31:53,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 20:31:53,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653961913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:53,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:53,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:31:53,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229947717] [2021-06-12 20:31:53,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:31:53,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:53,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:31:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:53,393 INFO L87 Difference]: Start difference. First operand 6769 states and 22031 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:53,533 INFO L93 Difference]: Finished difference Result 11547 states and 37607 transitions. [2021-06-12 20:31:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:31:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 20:31:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:53,561 INFO L225 Difference]: With dead ends: 11547 [2021-06-12 20:31:53,561 INFO L226 Difference]: Without dead ends: 11400 [2021-06-12 20:31:53,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-06-12 20:31:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10354. [2021-06-12 20:31:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 3.3118902733507194) internal successors, (34288), 10353 states have internal predecessors, (34288), 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 20:31:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 34288 transitions. [2021-06-12 20:31:53,779 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 34288 transitions. Word has length 48 [2021-06-12 20:31:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:53,780 INFO L482 AbstractCegarLoop]: Abstraction has 10354 states and 34288 transitions. [2021-06-12 20:31:53,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 34288 transitions. [2021-06-12 20:31:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:53,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:53,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:54,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:54,025 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash -45523527, now seen corresponding path program 7 times [2021-06-12 20:31:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:54,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28556998] [2021-06-12 20:31:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:54,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28556998] [2021-06-12 20:31:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28556998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55523960] [2021-06-12 20:31:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55523960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:54,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:54,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964647308] [2021-06-12 20:31:54,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:54,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:54,248 INFO L87 Difference]: Start difference. First operand 10354 states and 34288 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:54,444 INFO L93 Difference]: Finished difference Result 13296 states and 43632 transitions. [2021-06-12 20:31:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:31:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:54,472 INFO L225 Difference]: With dead ends: 13296 [2021-06-12 20:31:54,472 INFO L226 Difference]: Without dead ends: 11854 [2021-06-12 20:31:54,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2021-06-12 20:31:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 7019. [2021-06-12 20:31:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7019 states, 7018 states have (on average 3.2460815047021945) internal successors, (22781), 7018 states have internal predecessors, (22781), 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 20:31:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 22781 transitions. [2021-06-12 20:31:54,708 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 22781 transitions. Word has length 48 [2021-06-12 20:31:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:54,708 INFO L482 AbstractCegarLoop]: Abstraction has 7019 states and 22781 transitions. [2021-06-12 20:31:54,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 22781 transitions. [2021-06-12 20:31:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:54,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:54,726 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:54,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:31:54,941 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2094008463, now seen corresponding path program 8 times [2021-06-12 20:31:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:54,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766144078] [2021-06-12 20:31:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:55,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:55,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766144078] [2021-06-12 20:31:55,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766144078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:55,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519905563] [2021-06-12 20:31:55,040 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:55,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:55,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:55,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:55,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519905563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:55,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:55,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:55,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310336863] [2021-06-12 20:31:55,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:55,201 INFO L87 Difference]: Start difference. First operand 7019 states and 22781 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:55,332 INFO L93 Difference]: Finished difference Result 10813 states and 35013 transitions. [2021-06-12 20:31:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:31:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:55,353 INFO L225 Difference]: With dead ends: 10813 [2021-06-12 20:31:55,353 INFO L226 Difference]: Without dead ends: 10186 [2021-06-12 20:31:55,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-12 20:31:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 7527. [2021-06-12 20:31:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 7526 states have (on average 3.233723093276641) internal successors, (24337), 7526 states have internal predecessors, (24337), 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 20:31:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 24337 transitions. [2021-06-12 20:31:55,634 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 24337 transitions. Word has length 48 [2021-06-12 20:31:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:55,635 INFO L482 AbstractCegarLoop]: Abstraction has 7527 states and 24337 transitions. [2021-06-12 20:31:55,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 24337 transitions. [2021-06-12 20:31:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:55,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:55,648 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:55,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:31:55,848 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash 839402379, now seen corresponding path program 9 times [2021-06-12 20:31:55,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:55,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943899431] [2021-06-12 20:31:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:55,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:55,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943899431] [2021-06-12 20:31:55,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943899431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:55,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493329671] [2021-06-12 20:31:55,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:56,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:31:56,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:56,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493329671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:56,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:56,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037019938] [2021-06-12 20:31:56,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:56,096 INFO L87 Difference]: Start difference. First operand 7527 states and 24337 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:56,218 INFO L93 Difference]: Finished difference Result 12429 states and 40214 transitions. [2021-06-12 20:31:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:31:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:56,245 INFO L225 Difference]: With dead ends: 12429 [2021-06-12 20:31:56,245 INFO L226 Difference]: Without dead ends: 12276 [2021-06-12 20:31:56,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-06-12 20:31:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12112. [2021-06-12 20:31:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12112 states, 12111 states have (on average 3.2449838989348527) internal successors, (39300), 12111 states have internal predecessors, (39300), 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 20:31:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12112 states to 12112 states and 39300 transitions. [2021-06-12 20:31:56,494 INFO L78 Accepts]: Start accepts. Automaton has 12112 states and 39300 transitions. Word has length 48 [2021-06-12 20:31:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:56,494 INFO L482 AbstractCegarLoop]: Abstraction has 12112 states and 39300 transitions. [2021-06-12 20:31:56,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12112 states and 39300 transitions. [2021-06-12 20:31:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:56,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:56,513 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:56,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:31:56,714 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash -396921487, now seen corresponding path program 10 times [2021-06-12 20:31:56,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:56,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767743825] [2021-06-12 20:31:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:56,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767743825] [2021-06-12 20:31:56,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767743825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751336429] [2021-06-12 20:31:56,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:56,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:56,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:56,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751336429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:56,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:56,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686874752] [2021-06-12 20:31:56,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:56,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:56,930 INFO L87 Difference]: Start difference. First operand 12112 states and 39300 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:57,068 INFO L93 Difference]: Finished difference Result 21741 states and 70711 transitions. [2021-06-12 20:31:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:31:57,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:57,099 INFO L225 Difference]: With dead ends: 21741 [2021-06-12 20:31:57,099 INFO L226 Difference]: Without dead ends: 19893 [2021-06-12 20:31:57,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-06-12 20:31:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 18976. [2021-06-12 20:31:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18976 states, 18975 states have (on average 3.25965744400527) internal successors, (61852), 18975 states have internal predecessors, (61852), 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 20:31:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 61852 transitions. [2021-06-12 20:31:57,632 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 61852 transitions. Word has length 48 [2021-06-12 20:31:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:57,632 INFO L482 AbstractCegarLoop]: Abstraction has 18976 states and 61852 transitions. [2021-06-12 20:31:57,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 61852 transitions. [2021-06-12 20:31:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:57,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:57,658 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:57,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:31:57,861 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1705288085, now seen corresponding path program 11 times [2021-06-12 20:31:57,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:57,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458228392] [2021-06-12 20:31:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:58,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458228392] [2021-06-12 20:31:58,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458228392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180918200] [2021-06-12 20:31:58,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:58,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:31:58,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:58,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:58,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180918200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:58,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:58,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:58,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380685093] [2021-06-12 20:31:58,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:58,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:58,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:58,170 INFO L87 Difference]: Start difference. First operand 18976 states and 61852 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:58,406 INFO L93 Difference]: Finished difference Result 34095 states and 111504 transitions. [2021-06-12 20:31:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:31:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 20:31:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:58,465 INFO L225 Difference]: With dead ends: 34095 [2021-06-12 20:31:58,465 INFO L226 Difference]: Without dead ends: 30605 [2021-06-12 20:31:58,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-06-12 20:31:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 29305. [2021-06-12 20:31:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29305 states, 29304 states have (on average 3.2807125307125307) internal successors, (96138), 29304 states have internal predecessors, (96138), 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 20:31:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29305 states to 29305 states and 96138 transitions. [2021-06-12 20:31:59,172 INFO L78 Accepts]: Start accepts. Automaton has 29305 states and 96138 transitions. Word has length 48 [2021-06-12 20:31:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:59,172 INFO L482 AbstractCegarLoop]: Abstraction has 29305 states and 96138 transitions. [2021-06-12 20:31:59,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:31:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 29305 states and 96138 transitions. [2021-06-12 20:31:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:31:59,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:59,232 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:59,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:31:59,452 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash 574504397, now seen corresponding path program 12 times [2021-06-12 20:31:59,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:59,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481605149] [2021-06-12 20:31:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:59,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:59,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481605149] [2021-06-12 20:31:59,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481605149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562235066] [2021-06-12 20:31:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:59,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:31:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:59,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562235066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:59,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:59,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:59,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619413684] [2021-06-12 20:31:59,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:59,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:59,828 INFO L87 Difference]: Start difference. First operand 29305 states and 96138 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:32:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:00,270 INFO L93 Difference]: Finished difference Result 46568 states and 152448 transitions. [2021-06-12 20:32:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:32:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 20:32:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:00,358 INFO L225 Difference]: With dead ends: 46568 [2021-06-12 20:32:00,358 INFO L226 Difference]: Without dead ends: 44858 [2021-06-12 20:32:00,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:32:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44858 states. [2021-06-12 20:32:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44858 to 44258. [2021-06-12 20:32:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44258 states, 44257 states have (on average 3.277741374245882) internal successors, (145063), 44257 states have internal predecessors, (145063), 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 20:32:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44258 states to 44258 states and 145063 transitions. [2021-06-12 20:32:01,318 INFO L78 Accepts]: Start accepts. Automaton has 44258 states and 145063 transitions. Word has length 48 [2021-06-12 20:32:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:01,318 INFO L482 AbstractCegarLoop]: Abstraction has 44258 states and 145063 transitions. [2021-06-12 20:32:01,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 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 20:32:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 44258 states and 145063 transitions. [2021-06-12 20:32:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 20:32:01,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:01,382 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:01,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:01,583 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2122818921, now seen corresponding path program 1 times [2021-06-12 20:32:01,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:01,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443016962] [2021-06-12 20:32:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:32:01,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:01,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443016962] [2021-06-12 20:32:01,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443016962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668424802] [2021-06-12 20:32:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:32:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:32:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668424802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:01,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:01,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:01,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966924547] [2021-06-12 20:32:01,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:01,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:01,821 INFO L87 Difference]: Start difference. First operand 44258 states and 145063 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 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 20:32:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:02,202 INFO L93 Difference]: Finished difference Result 44256 states and 145061 transitions. [2021-06-12 20:32:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:32:02,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 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 59 [2021-06-12 20:32:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:02,202 INFO L225 Difference]: With dead ends: 44256 [2021-06-12 20:32:02,202 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 20:32:02,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 20:32:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 20:32:02,203 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 20:32:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 20:32:02,203 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-06-12 20:32:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:02,203 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 20:32:02,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 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 20:32:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 20:32:02,203 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:32:02,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:02,405 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:32:02,407 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:32:02 BasicIcfg [2021-06-12 20:32:02,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:32:02,409 INFO L168 Benchmark]: Toolchain (without parser) took 15815.91 ms. Allocated memory was 183.5 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 163.2 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 749.6 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:02,409 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 164.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:32:02,409 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.09 ms. Allocated memory is still 183.5 MB. Free memory was 163.0 MB in the beginning and 161.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:02,410 INFO L168 Benchmark]: Boogie Preprocessor took 21.04 ms. Allocated memory is still 183.5 MB. Free memory was 161.6 MB in the beginning and 160.7 MB in the end (delta: 985.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:02,410 INFO L168 Benchmark]: RCFGBuilder took 311.32 ms. Allocated memory is still 183.5 MB. Free memory was 160.6 MB in the beginning and 147.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:02,410 INFO L168 Benchmark]: TraceAbstraction took 15453.55 ms. Allocated memory was 183.5 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 147.1 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 733.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:32:02,410 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 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 164.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.09 ms. Allocated memory is still 183.5 MB. Free memory was 163.0 MB in the beginning and 161.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.04 ms. Allocated memory is still 183.5 MB. Free memory was 161.6 MB in the beginning and 160.7 MB in the end (delta: 985.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.32 ms. Allocated memory is still 183.5 MB. Free memory was 160.6 MB in the beginning and 147.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15453.55 ms. Allocated memory was 183.5 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 147.1 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 733.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 100]: 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, 69 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15370.3ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 358.3ms, AutomataDifference: 3149.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 132.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2083 SDtfs, 1333 SDslu, 7964 SDs, 0 SdLazy, 1605 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 826.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 782 GetRequests, 677 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 732.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44258occurred in iteration=19, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4534.9ms AutomataMinimizationTime, 20 MinimizatonAttempts, 17483 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 106.4ms SsaConstructionTime, 451.6ms SatisfiabilityAnalysisTime, 3081.4ms InterpolantComputationTime, 1522 NumberOfCodeBlocks, 1514 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1488 ConstructedInterpolants, 0 QuantifiedInterpolants, 8806 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1124 ConjunctsInSsa, 202 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 97/565 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...