/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:07:06,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:07:06,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:07:06,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:07:06,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:07:06,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:07:06,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:07:06,185 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 [2021-05-21 21:07:06,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:07:06,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:07:06,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:07:06,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:07:06,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:07:06,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:07:06,216 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:07:06,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:07:06,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:07:06,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:07:06,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:07:06,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:07:06,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:07:06,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:07:06,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:07:06,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:07:06,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:07:06,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:07:06,510 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:07:06,511 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:07:06,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-05-21 21:07:06,512 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-05-21 21:07:06,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:07:06,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:07:06,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:07:06,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:07:06,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:07:06,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:07:06,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:07:06,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:07:06,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:07:06,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/1) ... [2021-05-21 21:07:06,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:07:06,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:07:06,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:07:06,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:07:06,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (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 [2021-05-21 21:07:06,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:07:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:07:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:07:06,689 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:07:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:07:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:07:06,689 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:07:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:07:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:07:06,690 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:07:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:07:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:07:06,690 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 21:07:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 21:07:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 21:07:06,696 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:07:06,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:07:06,960 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:07:06,961 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:07:06 BoogieIcfgContainer [2021-05-21 21:07:06,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:07:06,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:07:06,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:07:06,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:07:06,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:06" (1/2) ... [2021-05-21 21:07:06,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eddb7a5 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:07:06, skipping insertion in model container [2021-05-21 21:07:06,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:07:06" (2/2) ... [2021-05-21 21:07:06,966 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-05-21 21:07:06,970 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:07:06,970 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:07:06,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:07:06,971 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:07:07,029 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-21 21:07:07,043 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 21:07:07,056 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:07:07,056 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:07:07,056 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:07:07,056 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:07:07,056 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:07:07,056 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:07:07,056 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:07:07,056 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:07:07,062 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-05-21 21:07:07,094 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 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) [2021-05-21 21:07:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 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) [2021-05-21 21:07:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 21:07:07,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:07,110 INFO L521 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] [2021-05-21 21:07:07,111 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash -412067460, now seen corresponding path program 1 times [2021-05-21 21:07:07,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:07,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810061592] [2021-05-21 21:07:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:07,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810061592] [2021-05-21 21:07:07,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810061592] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:07,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:07,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:07:07,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084891977] [2021-05-21 21:07:07,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:07:07,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:07:07,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:07:07,274 INFO L87 Difference]: Start difference. First operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:07,338 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-05-21 21:07:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:07:07,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 21:07:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:07,351 INFO L225 Difference]: With dead ends: 857 [2021-05-21 21:07:07,352 INFO L226 Difference]: Without dead ends: 732 [2021-05-21 21:07:07,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:07:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-21 21:07:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-05-21 21:07:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 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) [2021-05-21 21:07:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-05-21 21:07:07,440 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-05-21 21:07:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:07,441 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-05-21 21:07:07,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-05-21 21:07:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 21:07:07,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:07,451 INFO L521 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] [2021-05-21 21:07:07,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:07:07,451 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash 571605306, now seen corresponding path program 1 times [2021-05-21 21:07:07,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:07,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704779712] [2021-05-21 21:07:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:07,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:07,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704779712] [2021-05-21 21:07:07,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704779712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:07,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437094947] [2021-05-21 21:07:07,538 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 [2021-05-21 21:07:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:07,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437094947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:07,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:07,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-21 21:07:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741346388] [2021-05-21 21:07:07,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:07,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:07,756 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-05-21 21:07:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:07,829 INFO L93 Difference]: Finished difference Result 1528 states and 5659 transitions. [2021-05-21 21:07:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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 24 [2021-05-21 21:07:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:07,837 INFO L225 Difference]: With dead ends: 1528 [2021-05-21 21:07:07,837 INFO L226 Difference]: Without dead ends: 1528 [2021-05-21 21:07:07,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-05-21 21:07:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 838. [2021-05-21 21:07:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.771804062126643) internal successors, (3157), 837 states have internal predecessors, (3157), 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) [2021-05-21 21:07:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 3157 transitions. [2021-05-21 21:07:07,868 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 3157 transitions. Word has length 24 [2021-05-21 21:07:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:07,868 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 3157 transitions. [2021-05-21 21:07:07,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-05-21 21:07:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 3157 transitions. [2021-05-21 21:07:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 21:07:07,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:07,871 INFO L521 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] [2021-05-21 21:07:08,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 21:07:08,085 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2854590, now seen corresponding path program 1 times [2021-05-21 21:07:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:08,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943483820] [2021-05-21 21:07:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:08,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:08,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943483820] [2021-05-21 21:07:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943483820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:08,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:08,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:07:08,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955451763] [2021-05-21 21:07:08,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:08,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:08,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:08,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:08,137 INFO L87 Difference]: Start difference. First operand 838 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-05-21 21:07:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:08,198 INFO L93 Difference]: Finished difference Result 1187 states and 4245 transitions. [2021-05-21 21:07:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:08,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 24 [2021-05-21 21:07:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:08,204 INFO L225 Difference]: With dead ends: 1187 [2021-05-21 21:07:08,204 INFO L226 Difference]: Without dead ends: 1077 [2021-05-21 21:07:08,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:07:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-05-21 21:07:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 806. [2021-05-21 21:07:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.7950310559006213) internal successors, (3055), 805 states have internal predecessors, (3055), 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) [2021-05-21 21:07:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 3055 transitions. [2021-05-21 21:07:08,225 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 3055 transitions. Word has length 24 [2021-05-21 21:07:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:08,225 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 3055 transitions. [2021-05-21 21:07:08,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-05-21 21:07:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 3055 transitions. [2021-05-21 21:07:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 21:07:08,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:08,227 INFO L521 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] [2021-05-21 21:07:08,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:07:08,228 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash -257890470, now seen corresponding path program 2 times [2021-05-21 21:07:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:08,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981614092] [2021-05-21 21:07:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:08,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981614092] [2021-05-21 21:07:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981614092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:08,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:08,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:07:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606841814] [2021-05-21 21:07:08,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:08,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:08,257 INFO L87 Difference]: Start difference. First operand 806 states and 3055 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-05-21 21:07:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:08,287 INFO L93 Difference]: Finished difference Result 1023 states and 3746 transitions. [2021-05-21 21:07:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2021-05-21 21:07:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:08,292 INFO L225 Difference]: With dead ends: 1023 [2021-05-21 21:07:08,292 INFO L226 Difference]: Without dead ends: 1023 [2021-05-21 21:07:08,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-05-21 21:07:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 848. [2021-05-21 21:07:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.7485242030696577) internal successors, (3175), 847 states have internal predecessors, (3175), 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) [2021-05-21 21:07:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3175 transitions. [2021-05-21 21:07:08,314 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3175 transitions. Word has length 24 [2021-05-21 21:07:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:08,314 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 3175 transitions. [2021-05-21 21:07:08,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-05-21 21:07:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3175 transitions. [2021-05-21 21:07:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 21:07:08,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:08,316 INFO L521 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] [2021-05-21 21:07:08,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:07:08,316 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash 370394274, now seen corresponding path program 2 times [2021-05-21 21:07:08,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:08,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299155717] [2021-05-21 21:07:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:08,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:08,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299155717] [2021-05-21 21:07:08,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299155717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:08,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:08,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:07:08,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227211316] [2021-05-21 21:07:08,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:08,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:08,370 INFO L87 Difference]: Start difference. First operand 848 states and 3175 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-05-21 21:07:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:08,423 INFO L93 Difference]: Finished difference Result 1118 states and 4122 transitions. [2021-05-21 21:07:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2021-05-21 21:07:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:08,428 INFO L225 Difference]: With dead ends: 1118 [2021-05-21 21:07:08,428 INFO L226 Difference]: Without dead ends: 1048 [2021-05-21 21:07:08,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-05-21 21:07:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-05-21 21:07:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.7671711292200234) internal successors, (3236), 859 states have internal predecessors, (3236), 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) [2021-05-21 21:07:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3236 transitions. [2021-05-21 21:07:08,449 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3236 transitions. Word has length 24 [2021-05-21 21:07:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:08,449 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 3236 transitions. [2021-05-21 21:07:08,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-05-21 21:07:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3236 transitions. [2021-05-21 21:07:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 21:07:08,452 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:08,453 INFO L521 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] [2021-05-21 21:07:08,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:07:08,453 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1537471606, now seen corresponding path program 3 times [2021-05-21 21:07:08,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:08,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794393895] [2021-05-21 21:07:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:08,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794393895] [2021-05-21 21:07:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794393895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783770578] [2021-05-21 21:07:08,509 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:07:08,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:07:08,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:08,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:08,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:08,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783770578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:08,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:08,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-21 21:07:08,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219907459] [2021-05-21 21:07:08,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:08,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:08,624 INFO L87 Difference]: Start difference. First operand 860 states and 3236 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-05-21 21:07:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:08,676 INFO L93 Difference]: Finished difference Result 882 states and 3347 transitions. [2021-05-21 21:07:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 24 [2021-05-21 21:07:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:08,680 INFO L225 Difference]: With dead ends: 882 [2021-05-21 21:07:08,680 INFO L226 Difference]: Without dead ends: 822 [2021-05-21 21:07:08,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-05-21 21:07:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 702. [2021-05-21 21:07:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.843081312410842) internal successors, (2694), 701 states have internal predecessors, (2694), 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) [2021-05-21 21:07:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2694 transitions. [2021-05-21 21:07:08,700 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2694 transitions. Word has length 24 [2021-05-21 21:07:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:08,700 INFO L482 AbstractCegarLoop]: Abstraction has 702 states and 2694 transitions. [2021-05-21 21:07:08,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-05-21 21:07:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2694 transitions. [2021-05-21 21:07:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 21:07:08,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:08,703 INFO L521 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] [2021-05-21 21:07:08,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:08,917 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1935675546, now seen corresponding path program 1 times [2021-05-21 21:07:08,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:08,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122185361] [2021-05-21 21:07:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:08,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122185361] [2021-05-21 21:07:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122185361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890100680] [2021-05-21 21:07:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:09,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890100680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:09,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:09,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-05-21 21:07:09,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882411529] [2021-05-21 21:07:09,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:07:09,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:07:09,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:09,087 INFO L87 Difference]: Start difference. First operand 702 states and 2694 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-05-21 21:07:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:09,144 INFO L93 Difference]: Finished difference Result 926 states and 3582 transitions. [2021-05-21 21:07:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:09,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 26 [2021-05-21 21:07:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:09,149 INFO L225 Difference]: With dead ends: 926 [2021-05-21 21:07:09,149 INFO L226 Difference]: Without dead ends: 926 [2021-05-21 21:07:09,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-05-21 21:07:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 802. [2021-05-21 21:07:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 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) [2021-05-21 21:07:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-05-21 21:07:09,168 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-05-21 21:07:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:09,168 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-05-21 21:07:09,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-05-21 21:07:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-05-21 21:07:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:07:09,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:09,170 INFO L521 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, 1] [2021-05-21 21:07:09,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:09,385 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1942494820, now seen corresponding path program 1 times [2021-05-21 21:07:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:09,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126014878] [2021-05-21 21:07:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:09,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:09,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126014878] [2021-05-21 21:07:09,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126014878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:09,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473463591] [2021-05-21 21:07:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 21:07:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:09,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:09,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473463591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:09,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:09,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-05-21 21:07:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504089239] [2021-05-21 21:07:09,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:07:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:07:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:09,605 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-05-21 21:07:09,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:09,668 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-05-21 21:07:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 28 [2021-05-21 21:07:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:09,676 INFO L225 Difference]: With dead ends: 1509 [2021-05-21 21:07:09,676 INFO L226 Difference]: Without dead ends: 1509 [2021-05-21 21:07:09,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-05-21 21:07:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-05-21 21:07:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 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) [2021-05-21 21:07:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-05-21 21:07:09,701 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-05-21 21:07:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:09,701 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-05-21 21:07:09,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-05-21 21:07:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-05-21 21:07:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:07:09,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:09,706 INFO L521 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, 1] [2021-05-21 21:07:09,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:09,921 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash -210647880, now seen corresponding path program 2 times [2021-05-21 21:07:09,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:09,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020046228] [2021-05-21 21:07:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:09,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020046228] [2021-05-21 21:07:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020046228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277668402] [2021-05-21 21:07:09,972 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 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 [2021-05-21 21:07:10,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:10,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277668402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:10,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:07:10,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-05-21 21:07:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233369815] [2021-05-21 21:07:10,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:10,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:10,075 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-05-21 21:07:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:10,108 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-05-21 21:07:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2021-05-21 21:07:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:10,113 INFO L225 Difference]: With dead ends: 1136 [2021-05-21 21:07:10,114 INFO L226 Difference]: Without dead ends: 1088 [2021-05-21 21:07:10,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-05-21 21:07:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-05-21 21:07:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 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) [2021-05-21 21:07:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-05-21 21:07:10,134 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-05-21 21:07:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:10,134 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-05-21 21:07:10,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-05-21 21:07:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-05-21 21:07:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 21:07:10,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:10,136 INFO L521 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, 1, 1, 1] [2021-05-21 21:07:10,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:10,352 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash 319966110, now seen corresponding path program 1 times [2021-05-21 21:07:10,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:10,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092442578] [2021-05-21 21:07:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:10,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:10,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092442578] [2021-05-21 21:07:10,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092442578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:10,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090730728] [2021-05-21 21:07:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 21:07:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:07:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:10,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090730728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:10,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:10,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-21 21:07:10,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726960990] [2021-05-21 21:07:10,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:07:10,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:10,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:07:10,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:07:10,541 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-05-21 21:07:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:10,660 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-05-21 21:07:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:07:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 21:07:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:10,679 INFO L225 Difference]: With dead ends: 4025 [2021-05-21 21:07:10,679 INFO L226 Difference]: Without dead ends: 3705 [2021-05-21 21:07:10,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-05-21 21:07:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-05-21 21:07:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 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) [2021-05-21 21:07:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-05-21 21:07:10,768 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-05-21 21:07:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:10,768 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-05-21 21:07:10,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-05-21 21:07:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-05-21 21:07:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:10,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:10,775 INFO L521 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] [2021-05-21 21:07:10,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:10,991 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -874031780, now seen corresponding path program 2 times [2021-05-21 21:07:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:10,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180547465] [2021-05-21 21:07:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:11,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180547465] [2021-05-21 21:07:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180547465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207290249] [2021-05-21 21:07:11,051 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 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 [2021-05-21 21:07:11,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:11,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:11,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207290249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:11,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:11,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-21 21:07:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871400726] [2021-05-21 21:07:11,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:07:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:07:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:07:11,161 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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) [2021-05-21 21:07:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:11,388 INFO L93 Difference]: Finished difference Result 11823 states and 45853 transitions. [2021-05-21 21:07:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:07:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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 [2021-05-21 21:07:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:11,436 INFO L225 Difference]: With dead ends: 11823 [2021-05-21 21:07:11,436 INFO L226 Difference]: Without dead ends: 11823 [2021-05-21 21:07:11,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:07:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-05-21 21:07:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 4060. [2021-05-21 21:07:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 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) [2021-05-21 21:07:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-05-21 21:07:11,574 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-05-21 21:07:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:11,574 INFO L482 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-05-21 21:07:11,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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) [2021-05-21 21:07:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-05-21 21:07:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:11,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:11,584 INFO L521 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] [2021-05-21 21:07:11,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:11,802 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1773521824, now seen corresponding path program 3 times [2021-05-21 21:07:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:11,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970777274] [2021-05-21 21:07:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:11,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970777274] [2021-05-21 21:07:11,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970777274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267585323] [2021-05-21 21:07:11,843 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 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 [2021-05-21 21:07:11,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:07:11,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:12,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267585323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:12,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:12,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 21:07:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669071585] [2021-05-21 21:07:12,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:12,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:12,010 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2021-05-21 21:07:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:12,607 INFO L93 Difference]: Finished difference Result 18640 states and 72700 transitions. [2021-05-21 21:07:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:07:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 [2021-05-21 21:07:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:12,689 INFO L225 Difference]: With dead ends: 18640 [2021-05-21 21:07:12,689 INFO L226 Difference]: Without dead ends: 17252 [2021-05-21 21:07:12,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:07:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-05-21 21:07:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 8566. [2021-05-21 21:07:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.2192644483362525) internal successors, (36138), 8565 states have internal predecessors, (36138), 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) [2021-05-21 21:07:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 36138 transitions. [2021-05-21 21:07:13,154 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 36138 transitions. Word has length 32 [2021-05-21 21:07:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:13,154 INFO L482 AbstractCegarLoop]: Abstraction has 8566 states and 36138 transitions. [2021-05-21 21:07:13,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2021-05-21 21:07:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 36138 transitions. [2021-05-21 21:07:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:13,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:13,182 INFO L521 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] [2021-05-21 21:07:13,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-21 21:07:13,397 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:13,398 INFO L82 PathProgramCache]: Analyzing trace with hash -402067132, now seen corresponding path program 4 times [2021-05-21 21:07:13,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:13,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580666017] [2021-05-21 21:07:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:13,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:13,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580666017] [2021-05-21 21:07:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580666017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216003841] [2021-05-21 21:07:13,445 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 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 [2021-05-21 21:07:13,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:07:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:13,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216003841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:13,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:13,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:07:13,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126104020] [2021-05-21 21:07:13,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:13,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:13,561 INFO L87 Difference]: Start difference. First operand 8566 states and 36138 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-21 21:07:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:13,689 INFO L93 Difference]: Finished difference Result 13296 states and 52964 transitions. [2021-05-21 21:07:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:07:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 32 [2021-05-21 21:07:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:13,725 INFO L225 Difference]: With dead ends: 13296 [2021-05-21 21:07:13,725 INFO L226 Difference]: Without dead ends: 13128 [2021-05-21 21:07:13,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:07:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-05-21 21:07:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 8482. [2021-05-21 21:07:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 8481 states have (on average 4.17851668435326) internal successors, (35438), 8481 states have internal predecessors, (35438), 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) [2021-05-21 21:07:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 35438 transitions. [2021-05-21 21:07:14,066 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 35438 transitions. Word has length 32 [2021-05-21 21:07:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:14,067 INFO L482 AbstractCegarLoop]: Abstraction has 8482 states and 35438 transitions. [2021-05-21 21:07:14,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-21 21:07:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 35438 transitions. [2021-05-21 21:07:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:14,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:14,086 INFO L521 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] [2021-05-21 21:07:14,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:14,303 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1929237264, now seen corresponding path program 5 times [2021-05-21 21:07:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:14,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345031667] [2021-05-21 21:07:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:14,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:14,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345031667] [2021-05-21 21:07:14,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345031667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:14,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075809413] [2021-05-21 21:07:14,412 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:07:14,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:07:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:14,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075809413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:14,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:14,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 21:07:14,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971301188] [2021-05-21 21:07:14,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:14,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:14,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:14,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:14,562 INFO L87 Difference]: Start difference. First operand 8482 states and 35438 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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) [2021-05-21 21:07:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:14,728 INFO L93 Difference]: Finished difference Result 17125 states and 69725 transitions. [2021-05-21 21:07:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:07:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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 [2021-05-21 21:07:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:14,777 INFO L225 Difference]: With dead ends: 17125 [2021-05-21 21:07:14,778 INFO L226 Difference]: Without dead ends: 17125 [2021-05-21 21:07:14,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:07:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-05-21 21:07:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 10475. [2021-05-21 21:07:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10474 states have (on average 4.289765132709567) internal successors, (44931), 10474 states have internal predecessors, (44931), 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) [2021-05-21 21:07:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 44931 transitions. [2021-05-21 21:07:15,209 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 44931 transitions. Word has length 32 [2021-05-21 21:07:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:15,210 INFO L482 AbstractCegarLoop]: Abstraction has 10475 states and 44931 transitions. [2021-05-21 21:07:15,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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) [2021-05-21 21:07:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 44931 transitions. [2021-05-21 21:07:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:15,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:15,234 INFO L521 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] [2021-05-21 21:07:15,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:15,449 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1951270200, now seen corresponding path program 6 times [2021-05-21 21:07:15,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:15,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876483991] [2021-05-21 21:07:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:15,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876483991] [2021-05-21 21:07:15,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876483991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457598727] [2021-05-21 21:07:15,500 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 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 [2021-05-21 21:07:15,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:07:15,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:15,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457598727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:15,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:15,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:07:15,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301870792] [2021-05-21 21:07:15,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:15,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:15,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:15,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:15,588 INFO L87 Difference]: Start difference. First operand 10475 states and 44931 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-21 21:07:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:15,797 INFO L93 Difference]: Finished difference Result 16571 states and 66710 transitions. [2021-05-21 21:07:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:07:15,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 32 [2021-05-21 21:07:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:15,846 INFO L225 Difference]: With dead ends: 16571 [2021-05-21 21:07:15,846 INFO L226 Difference]: Without dead ends: 16190 [2021-05-21 21:07:15,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:07:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-05-21 21:07:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 10209. [2021-05-21 21:07:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 10208 states have (on average 4.278800940438871) internal successors, (43678), 10208 states have internal predecessors, (43678), 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) [2021-05-21 21:07:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 43678 transitions. [2021-05-21 21:07:16,160 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 43678 transitions. Word has length 32 [2021-05-21 21:07:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:16,160 INFO L482 AbstractCegarLoop]: Abstraction has 10209 states and 43678 transitions. [2021-05-21 21:07:16,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-21 21:07:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 43678 transitions. [2021-05-21 21:07:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:16,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:16,183 INFO L521 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] [2021-05-21 21:07:16,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:07:16,397 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash -722377608, now seen corresponding path program 7 times [2021-05-21 21:07:16,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:16,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564167698] [2021-05-21 21:07:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:16,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:16,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564167698] [2021-05-21 21:07:16,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564167698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593487900] [2021-05-21 21:07:16,444 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 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 [2021-05-21 21:07:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:16,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593487900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:16,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:16,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 21:07:16,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002210676] [2021-05-21 21:07:16,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:16,566 INFO L87 Difference]: Start difference. First operand 10209 states and 43678 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-05-21 21:07:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:16,909 INFO L93 Difference]: Finished difference Result 19431 states and 81047 transitions. [2021-05-21 21:07:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:07:16,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 32 [2021-05-21 21:07:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:16,961 INFO L225 Difference]: With dead ends: 19431 [2021-05-21 21:07:16,962 INFO L226 Difference]: Without dead ends: 19035 [2021-05-21 21:07:16,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:07:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-05-21 21:07:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 13737. [2021-05-21 21:07:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 4.360439720442632) internal successors, (59895), 13736 states have internal predecessors, (59895), 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) [2021-05-21 21:07:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 59895 transitions. [2021-05-21 21:07:17,356 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 59895 transitions. Word has length 32 [2021-05-21 21:07:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:17,357 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 59895 transitions. [2021-05-21 21:07:17,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-05-21 21:07:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 59895 transitions. [2021-05-21 21:07:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:17,391 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:17,391 INFO L521 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] [2021-05-21 21:07:17,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:07:17,605 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1698964616, now seen corresponding path program 8 times [2021-05-21 21:07:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:17,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378288192] [2021-05-21 21:07:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:17,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378288192] [2021-05-21 21:07:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378288192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109232374] [2021-05-21 21:07:17,641 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 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 [2021-05-21 21:07:17,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:17,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109232374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:17,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:17,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 21:07:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270219798] [2021-05-21 21:07:17,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:17,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:17,778 INFO L87 Difference]: Start difference. First operand 13737 states and 59895 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2021-05-21 21:07:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:18,934 INFO L93 Difference]: Finished difference Result 59639 states and 243328 transitions. [2021-05-21 21:07:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:07:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 [2021-05-21 21:07:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:19,131 INFO L225 Difference]: With dead ends: 59639 [2021-05-21 21:07:19,132 INFO L226 Difference]: Without dead ends: 58849 [2021-05-21 21:07:19,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 21:07:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58849 states. [2021-05-21 21:07:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58849 to 27180. [2021-05-21 21:07:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27180 states, 27179 states have (on average 4.433606828801648) internal successors, (120501), 27179 states have internal predecessors, (120501), 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) [2021-05-21 21:07:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27180 states to 27180 states and 120501 transitions. [2021-05-21 21:07:20,369 INFO L78 Accepts]: Start accepts. Automaton has 27180 states and 120501 transitions. Word has length 32 [2021-05-21 21:07:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:20,370 INFO L482 AbstractCegarLoop]: Abstraction has 27180 states and 120501 transitions. [2021-05-21 21:07:20,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2021-05-21 21:07:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27180 states and 120501 transitions. [2021-05-21 21:07:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:07:20,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:20,426 INFO L521 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] [2021-05-21 21:07:20,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:07:20,627 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1473506436, now seen corresponding path program 9 times [2021-05-21 21:07:20,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:20,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156278844] [2021-05-21 21:07:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:20,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156278844] [2021-05-21 21:07:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156278844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6056828] [2021-05-21 21:07:20,666 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 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 [2021-05-21 21:07:20,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:07:20,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:20,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:20,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:20,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6056828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:20,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:20,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-21 21:07:20,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554524259] [2021-05-21 21:07:20,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:20,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:20,763 INFO L87 Difference]: Start difference. First operand 27180 states and 120501 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-05-21 21:07:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:21,143 INFO L93 Difference]: Finished difference Result 31277 states and 134903 transitions. [2021-05-21 21:07:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:07:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 32 [2021-05-21 21:07:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:21,232 INFO L225 Difference]: With dead ends: 31277 [2021-05-21 21:07:21,232 INFO L226 Difference]: Without dead ends: 30802 [2021-05-21 21:07:21,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:07:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-05-21 21:07:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 25038. [2021-05-21 21:07:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 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) [2021-05-21 21:07:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-05-21 21:07:21,897 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-05-21 21:07:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:21,897 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-05-21 21:07:21,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-05-21 21:07:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-05-21 21:07:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 21:07:21,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:21,955 INFO L521 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] [2021-05-21 21:07:22,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:22,169 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash -963056650, now seen corresponding path program 10 times [2021-05-21 21:07:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:22,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630087193] [2021-05-21 21:07:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:07:22,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:22,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630087193] [2021-05-21 21:07:22,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630087193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:22,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492935802] [2021-05-21 21:07:22,205 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:22,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:07:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:07:22,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492935802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:22,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:22,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:07:22,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94865867] [2021-05-21 21:07:22,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:22,318 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 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) [2021-05-21 21:07:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:23,230 INFO L93 Difference]: Finished difference Result 54817 states and 230789 transitions. [2021-05-21 21:07:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:07:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 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 34 [2021-05-21 21:07:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:23,406 INFO L225 Difference]: With dead ends: 54817 [2021-05-21 21:07:23,406 INFO L226 Difference]: Without dead ends: 53957 [2021-05-21 21:07:23,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:07:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53957 states. [2021-05-21 21:07:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53957 to 33088. [2021-05-21 21:07:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33088 states, 33087 states have (on average 4.473599903285278) internal successors, (148018), 33087 states have internal predecessors, (148018), 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) [2021-05-21 21:07:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33088 states to 33088 states and 148018 transitions. [2021-05-21 21:07:24,496 INFO L78 Accepts]: Start accepts. Automaton has 33088 states and 148018 transitions. Word has length 34 [2021-05-21 21:07:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:24,496 INFO L482 AbstractCegarLoop]: Abstraction has 33088 states and 148018 transitions. [2021-05-21 21:07:24,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 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) [2021-05-21 21:07:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 33088 states and 148018 transitions. [2021-05-21 21:07:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 21:07:24,564 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:24,564 INFO L521 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] [2021-05-21 21:07:24,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:24,777 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1490817678, now seen corresponding path program 11 times [2021-05-21 21:07:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:24,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088264305] [2021-05-21 21:07:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 21:07:24,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:24,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088264305] [2021-05-21 21:07:24,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088264305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:24,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555426622] [2021-05-21 21:07:24,858 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:24,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:07:24,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:24,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:07:25,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555426622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:25,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:25,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 21:07:25,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144634604] [2021-05-21 21:07:25,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:25,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:25,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:25,007 INFO L87 Difference]: Start difference. First operand 33088 states and 148018 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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) [2021-05-21 21:07:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:25,998 INFO L93 Difference]: Finished difference Result 59653 states and 250894 transitions. [2021-05-21 21:07:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:07:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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 34 [2021-05-21 21:07:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:26,202 INFO L225 Difference]: With dead ends: 59653 [2021-05-21 21:07:26,202 INFO L226 Difference]: Without dead ends: 58480 [2021-05-21 21:07:26,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 367.1ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:07:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-05-21 21:07:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 38451. [2021-05-21 21:07:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.454200260078023) internal successors, (171264), 38450 states have internal predecessors, (171264), 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) [2021-05-21 21:07:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 171264 transitions. [2021-05-21 21:07:27,512 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 171264 transitions. Word has length 34 [2021-05-21 21:07:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:27,512 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 171264 transitions. [2021-05-21 21:07:27,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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) [2021-05-21 21:07:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 171264 transitions. [2021-05-21 21:07:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:07:27,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:27,597 INFO L521 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] [2021-05-21 21:07:27,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:27,797 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1889373340, now seen corresponding path program 12 times [2021-05-21 21:07:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:27,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964014792] [2021-05-21 21:07:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 21:07:27,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964014792] [2021-05-21 21:07:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964014792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146820068] [2021-05-21 21:07:27,844 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:27,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:07:27,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 21:07:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146820068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:27,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:27,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-05-21 21:07:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666421221] [2021-05-21 21:07:27,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:27,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:27,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:27,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:27,955 INFO L87 Difference]: Start difference. First operand 38451 states and 171264 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) [2021-05-21 21:07:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:28,978 INFO L93 Difference]: Finished difference Result 101501 states and 447345 transitions. [2021-05-21 21:07:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:07:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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 36 [2021-05-21 21:07:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:29,341 INFO L225 Difference]: With dead ends: 101501 [2021-05-21 21:07:29,342 INFO L226 Difference]: Without dead ends: 100925 [2021-05-21 21:07:29,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:07:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2021-05-21 21:07:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 64709. [2021-05-21 21:07:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64709 states, 64708 states have (on average 4.539284168881745) internal successors, (293728), 64708 states have internal predecessors, (293728), 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) [2021-05-21 21:07:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64709 states to 64709 states and 293728 transitions. [2021-05-21 21:07:31,452 INFO L78 Accepts]: Start accepts. Automaton has 64709 states and 293728 transitions. Word has length 36 [2021-05-21 21:07:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:31,452 INFO L482 AbstractCegarLoop]: Abstraction has 64709 states and 293728 transitions. [2021-05-21 21:07:31,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) [2021-05-21 21:07:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 64709 states and 293728 transitions. [2021-05-21 21:07:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:07:31,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:31,618 INFO L521 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] [2021-05-21 21:07:31,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 21:07:31,820 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -644790412, now seen corresponding path program 13 times [2021-05-21 21:07:31,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:31,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017589050] [2021-05-21 21:07:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:32,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:32,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017589050] [2021-05-21 21:07:32,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017589050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:32,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148745847] [2021-05-21 21:07:32,276 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:32,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:07:32,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148745847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:32,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:32,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 21:07:32,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283167205] [2021-05-21 21:07:32,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:07:32,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:32,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:07:32,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:32,469 INFO L87 Difference]: Start difference. First operand 64709 states and 293728 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 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) [2021-05-21 21:07:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:35,803 INFO L93 Difference]: Finished difference Result 345279 states and 1557613 transitions. [2021-05-21 21:07:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:07:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 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 36 [2021-05-21 21:07:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:37,798 INFO L225 Difference]: With dead ends: 345279 [2021-05-21 21:07:37,799 INFO L226 Difference]: Without dead ends: 340111 [2021-05-21 21:07:37,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:07:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340111 states. [2021-05-21 21:07:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340111 to 209327. [2021-05-21 21:07:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209327 states, 209326 states have (on average 4.720412180044524) internal successors, (988105), 209326 states have internal predecessors, (988105), 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) [2021-05-21 21:07:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209327 states to 209327 states and 988105 transitions. [2021-05-21 21:07:46,805 INFO L78 Accepts]: Start accepts. Automaton has 209327 states and 988105 transitions. Word has length 36 [2021-05-21 21:07:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:46,805 INFO L482 AbstractCegarLoop]: Abstraction has 209327 states and 988105 transitions. [2021-05-21 21:07:46,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 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) [2021-05-21 21:07:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 209327 states and 988105 transitions. [2021-05-21 21:07:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:07:47,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:47,965 INFO L521 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] [2021-05-21 21:07:48,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:07:48,183 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash -854765258, now seen corresponding path program 14 times [2021-05-21 21:07:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:48,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133034194] [2021-05-21 21:07:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:07:48,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133034194] [2021-05-21 21:07:48,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133034194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959675834] [2021-05-21 21:07:48,238 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:48,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:48,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:07:48,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959675834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:48,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:48,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:07:48,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675574701] [2021-05-21 21:07:48,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:48,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:48,358 INFO L87 Difference]: Start difference. First operand 209327 states and 988105 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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) [2021-05-21 21:07:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:50,449 INFO L93 Difference]: Finished difference Result 231776 states and 1069827 transitions. [2021-05-21 21:07:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:07:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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 36 [2021-05-21 21:07:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:51,872 INFO L225 Difference]: With dead ends: 231776 [2021-05-21 21:07:51,873 INFO L226 Difference]: Without dead ends: 229312 [2021-05-21 21:07:51,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:07:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229312 states. [2021-05-21 21:07:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229312 to 204036. [2021-05-21 21:07:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204036 states, 204035 states have (on average 4.715220427867767) internal successors, (962070), 204035 states have internal predecessors, (962070), 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) [2021-05-21 21:07:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204036 states to 204036 states and 962070 transitions. [2021-05-21 21:07:58,566 INFO L78 Accepts]: Start accepts. Automaton has 204036 states and 962070 transitions. Word has length 36 [2021-05-21 21:07:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:58,567 INFO L482 AbstractCegarLoop]: Abstraction has 204036 states and 962070 transitions. [2021-05-21 21:07:58,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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) [2021-05-21 21:07:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 204036 states and 962070 transitions. [2021-05-21 21:07:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 21:07:59,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:59,731 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 21:07:59,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:07:59,941 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1958295198, now seen corresponding path program 15 times [2021-05-21 21:07:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:59,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823189561] [2021-05-21 21:07:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:59,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823189561] [2021-05-21 21:07:59,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823189561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909104872] [2021-05-21 21:07:59,995 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:00,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:08:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:08:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:00,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909104872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:00,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:00,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-21 21:08:00,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056284193] [2021-05-21 21:08:00,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:08:00,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:00,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:08:00,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:08:00,101 INFO L87 Difference]: Start difference. First operand 204036 states and 962070 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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) [2021-05-21 21:08:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:05,233 INFO L93 Difference]: Finished difference Result 502202 states and 2377356 transitions. [2021-05-21 21:08:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:08:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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 38 [2021-05-21 21:08:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:08,242 INFO L225 Difference]: With dead ends: 502202 [2021-05-21 21:08:08,242 INFO L226 Difference]: Without dead ends: 498334 [2021-05-21 21:08:08,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498334 states. [2021-05-21 21:08:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498334 to 386864. [2021-05-21 21:08:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386864 states, 386863 states have (on average 4.774356813652378) internal successors, (1847022), 386863 states have internal predecessors, (1847022), 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) [2021-05-21 21:08:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386864 states to 386864 states and 1847022 transitions. [2021-05-21 21:08:23,436 INFO L78 Accepts]: Start accepts. Automaton has 386864 states and 1847022 transitions. Word has length 38 [2021-05-21 21:08:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:23,436 INFO L482 AbstractCegarLoop]: Abstraction has 386864 states and 1847022 transitions. [2021-05-21 21:08:23,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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) [2021-05-21 21:08:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 386864 states and 1847022 transitions. [2021-05-21 21:08:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:08:25,294 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:25,294 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 21:08:25,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 21:08:25,509 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -79715748, now seen corresponding path program 16 times [2021-05-21 21:08:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:25,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483443726] [2021-05-21 21:08:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 21:08:26,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:26,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483443726] [2021-05-21 21:08:26,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483443726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:26,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273957774] [2021-05-21 21:08:26,258 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:26,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:26,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:08:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 21:08:26,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273957774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:26,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:26,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-05-21 21:08:26,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619891280] [2021-05-21 21:08:26,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:08:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:08:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:26,544 INFO L87 Difference]: Start difference. First operand 386864 states and 1847022 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-05-21 21:08:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:38,217 INFO L93 Difference]: Finished difference Result 1120732 states and 5108769 transitions. [2021-05-21 21:08:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:08:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 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 40 [2021-05-21 21:08:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:45,276 INFO L225 Difference]: With dead ends: 1120732 [2021-05-21 21:08:45,276 INFO L226 Difference]: Without dead ends: 1114512 [2021-05-21 21:08:45,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:08:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114512 states. [2021-05-21 21:09:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114512 to 448533. [2021-05-21 21:09:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448533 states, 448532 states have (on average 4.7567286169102765) internal successors, (2133545), 448532 states have internal predecessors, (2133545), 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) [2021-05-21 21:09:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448533 states to 448533 states and 2133545 transitions. [2021-05-21 21:09:14,398 INFO L78 Accepts]: Start accepts. Automaton has 448533 states and 2133545 transitions. Word has length 40 [2021-05-21 21:09:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:14,398 INFO L482 AbstractCegarLoop]: Abstraction has 448533 states and 2133545 transitions. [2021-05-21 21:09:14,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-05-21 21:09:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 448533 states and 2133545 transitions. [2021-05-21 21:09:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:09:17,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:17,605 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 21:09:17,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:09:17,821 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1291496032, now seen corresponding path program 17 times [2021-05-21 21:09:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:17,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589684564] [2021-05-21 21:09:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 21:09:17,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:17,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589684564] [2021-05-21 21:09:17,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589684564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:17,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725073413] [2021-05-21 21:09:17,920 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:18,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:09:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:09:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 21:09:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725073413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:18,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:18,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 21:09:18,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397137063] [2021-05-21 21:09:18,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:09:18,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:09:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:09:18,137 INFO L87 Difference]: Start difference. First operand 448533 states and 2133545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 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) [2021-05-21 21:09:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:39,725 INFO L93 Difference]: Finished difference Result 1565237 states and 7251935 transitions. [2021-05-21 21:09:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 21:09:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 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 40 [2021-05-21 21:09:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:50,929 INFO L225 Difference]: With dead ends: 1565237 [2021-05-21 21:09:50,929 INFO L226 Difference]: Without dead ends: 1521056 [2021-05-21 21:09:50,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 931.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=4574, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 21:09:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521056 states. [2021-05-21 21:10:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521056 to 810028. [2021-05-21 21:10:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810028 states, 810027 states have (on average 4.736152004809716) internal successors, (3836411), 810027 states have internal predecessors, (3836411), 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) [2021-05-21 21:10:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810028 states to 810028 states and 3836411 transitions. [2021-05-21 21:10:39,870 INFO L78 Accepts]: Start accepts. Automaton has 810028 states and 3836411 transitions. Word has length 40 [2021-05-21 21:10:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:39,870 INFO L482 AbstractCegarLoop]: Abstraction has 810028 states and 3836411 transitions. [2021-05-21 21:10:39,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 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) [2021-05-21 21:10:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 810028 states and 3836411 transitions. [2021-05-21 21:10:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:10:45,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:45,751 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-21 21:10:45,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:45,967 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1485289540, now seen corresponding path program 18 times [2021-05-21 21:10:45,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:45,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062957570] [2021-05-21 21:10:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 21:10:46,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:46,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062957570] [2021-05-21 21:10:46,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062957570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:46,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176657667] [2021-05-21 21:10:46,030 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:46,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:10:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:10:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 21:10:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176657667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:46,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:46,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 21:10:46,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427775067] [2021-05-21 21:10:46,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:10:46,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:10:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:10:46,198 INFO L87 Difference]: Start difference. First operand 810028 states and 3836411 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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)