/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:32:05,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:32:05,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:32:05,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:32:05,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 19:32:05,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:32:05,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:32:05,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:32:05,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:32:05,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:32:05,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:32:05,316 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:32:05,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:32:05,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:32:05,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:32:05,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:32:05,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:32:05,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:32:05,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:32:05,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:32:05,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:32:05,319 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:32:05,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:32:05,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:32:05,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:32:05,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:32:05,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:32:05,637 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:32:05,640 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:32:05,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-06-12 19:32:05,641 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-06-12 19:32:05,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:32:05,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:32:05,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:32:05,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:32:05,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:32:05,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:32:05,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:32:05,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:32:05,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:32:05,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... [2021-06-12 19:32:05,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:32:05,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:32:05,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:32:05,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:32:05,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:32:05,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:32:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:32:05,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:32:05,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:32:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:32:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:32:05,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:32:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:32:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:32:05,775 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:32:06,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:32:06,029 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 19:32:06,030 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 19:32:06,030 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 19:32:06,036 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:32:06 BoogieIcfgContainer [2021-06-12 19:32:06,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:32:06,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:32:06,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:32:06,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:32:06,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:32:05" (1/2) ... [2021-06-12 19:32:06,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bcd276 and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:32:06, skipping insertion in model container [2021-06-12 19:32:06,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:32:06" (2/2) ... [2021-06-12 19:32:06,042 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-06-12 19:32:06,046 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:32:06,046 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:32:06,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:32:06,047 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:32:06,068 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:32:06,087 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:32:06,101 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:32:06,102 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:32:06,102 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:32:06,102 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:32:06,102 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:32:06,102 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:32:06,102 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:32:06,102 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:32:06,109 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-12 19:32:06,116 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-12 19:32:06,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:06,122 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:06,122 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:06,126 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-06-12 19:32:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333812686] [2021-06-12 19:32:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:06,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:06,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333812686] [2021-06-12 19:32:06,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333812686] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:32:06,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:32:06,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:32:06,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343373664] [2021-06-12 19:32:06,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:32:06,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:32:06,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:32:06,285 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:06,335 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-12 19:32:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:32:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-06-12 19:32:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:06,343 INFO L225 Difference]: With dead ends: 22 [2021-06-12 19:32:06,343 INFO L226 Difference]: Without dead ends: 19 [2021-06-12 19:32:06,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:32:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-12 19:32:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-12 19:32:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-12 19:32:06,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-12 19:32:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:06,374 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-12 19:32:06,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-12 19:32:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:32:06,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:06,376 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:06,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:32:06,379 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-06-12 19:32:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:06,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458866169] [2021-06-12 19:32:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:06,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:06,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458866169] [2021-06-12 19:32:06,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458866169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:06,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588664649] [2021-06-12 19:32:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:32:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588664649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:06,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:06,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-12 19:32:06,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881185786] [2021-06-12 19:32:06,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:32:06,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:06,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:32:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:32:06,592 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:06,633 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-12 19:32:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:32:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 19:32:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:06,635 INFO L225 Difference]: With dead ends: 28 [2021-06-12 19:32:06,636 INFO L226 Difference]: Without dead ends: 28 [2021-06-12 19:32:06,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:32:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-12 19:32:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-12 19:32:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-12 19:32:06,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-12 19:32:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:06,645 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-12 19:32:06,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-12 19:32:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:32:06,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:06,647 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:06,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 19:32:06,869 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-06-12 19:32:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:06,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237780754] [2021-06-12 19:32:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:06,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237780754] [2021-06-12 19:32:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237780754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:32:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:32:06,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:32:06,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593881848] [2021-06-12 19:32:06,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:32:06,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:32:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:32:06,923 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:06,955 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-12 19:32:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:32:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-12 19:32:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:06,961 INFO L225 Difference]: With dead ends: 22 [2021-06-12 19:32:06,962 INFO L226 Difference]: Without dead ends: 18 [2021-06-12 19:32:06,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:32:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-12 19:32:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-12 19:32:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-12 19:32:06,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-12 19:32:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:06,968 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-12 19:32:06,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-12 19:32:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:32:06,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:06,969 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:06,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:32:06,969 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-06-12 19:32:06,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:06,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684791360] [2021-06-12 19:32:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:07,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:07,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684791360] [2021-06-12 19:32:07,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684791360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:32:07,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:32:07,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:32:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918962962] [2021-06-12 19:32:07,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:32:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:32:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:32:07,024 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:07,044 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-12 19:32:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:32:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-12 19:32:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:07,046 INFO L225 Difference]: With dead ends: 20 [2021-06-12 19:32:07,046 INFO L226 Difference]: Without dead ends: 20 [2021-06-12 19:32:07,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:32:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-12 19:32:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-12 19:32:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-12 19:32:07,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-12 19:32:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:07,053 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-12 19:32:07,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-12 19:32:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:32:07,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:07,054 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:07,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 19:32:07,054 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-06-12 19:32:07,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:07,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948485779] [2021-06-12 19:32:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:07,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:07,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948485779] [2021-06-12 19:32:07,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948485779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:07,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671742028] [2021-06-12 19:32:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:32:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:07,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671742028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:07,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:07,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 19:32:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480970074] [2021-06-12 19:32:07,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:32:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:32:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:32:07,209 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:07,228 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-12 19:32:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:32:07,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-12 19:32:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:07,229 INFO L225 Difference]: With dead ends: 24 [2021-06-12 19:32:07,229 INFO L226 Difference]: Without dead ends: 24 [2021-06-12 19:32:07,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:32:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-12 19:32:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-12 19:32:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-12 19:32:07,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-12 19:32:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:07,236 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-12 19:32:07,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-12 19:32:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:32:07,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:07,237 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:07,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:07,456 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:07,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-06-12 19:32:07,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:07,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337141174] [2021-06-12 19:32:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:07,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337141174] [2021-06-12 19:32:07,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337141174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:07,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824593690] [2021-06-12 19:32:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:07,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:07,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:32:07,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824593690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:07,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:07,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 19:32:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473034225] [2021-06-12 19:32:07,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:32:07,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:07,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:32:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:32:07,655 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:07,684 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-12 19:32:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:32:07,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:32:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:07,685 INFO L225 Difference]: With dead ends: 28 [2021-06-12 19:32:07,685 INFO L226 Difference]: Without dead ends: 28 [2021-06-12 19:32:07,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:32:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-12 19:32:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-12 19:32:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2021-06-12 19:32:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-12 19:32:07,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-12 19:32:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:07,695 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-12 19:32:07,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-12 19:32:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:32:07,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:07,696 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:07,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:07,909 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-06-12 19:32:07,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:07,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756710012] [2021-06-12 19:32:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:07,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:07,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756710012] [2021-06-12 19:32:07,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756710012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:07,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304420401] [2021-06-12 19:32:07,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:07,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:32:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:32:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:08,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304420401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:08,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:08,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:32:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683655692] [2021-06-12 19:32:08,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:32:08,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:32:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:32:08,071 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:08,109 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-06-12 19:32:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:32:08,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 13 [2021-06-12 19:32:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:08,111 INFO L225 Difference]: With dead ends: 32 [2021-06-12 19:32:08,111 INFO L226 Difference]: Without dead ends: 32 [2021-06-12 19:32:08,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:32:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-12 19:32:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-06-12 19:32:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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) [2021-06-12 19:32:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-06-12 19:32:08,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-06-12 19:32:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:08,114 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-06-12 19:32:08,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-06-12 19:32:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:32:08,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:08,115 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:08,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:08,339 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-06-12 19:32:08,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:08,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116384321] [2021-06-12 19:32:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:08,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:08,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116384321] [2021-06-12 19:32:08,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116384321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:08,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210921639] [2021-06-12 19:32:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:08,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:08,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:32:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:08,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210921639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:08,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:08,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-12 19:32:08,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131904567] [2021-06-12 19:32:08,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:08,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:08,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:08,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:08,528 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:08,558 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-06-12 19:32:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:32:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:32:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:08,559 INFO L225 Difference]: With dead ends: 36 [2021-06-12 19:32:08,559 INFO L226 Difference]: Without dead ends: 36 [2021-06-12 19:32:08,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-12 19:32:08,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-12 19:32:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2021-06-12 19:32:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-12 19:32:08,563 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-06-12 19:32:08,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:08,563 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-12 19:32:08,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-12 19:32:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:32:08,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:08,564 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:08,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:08,781 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:08,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-06-12 19:32:08,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:08,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656656588] [2021-06-12 19:32:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:08,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:08,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656656588] [2021-06-12 19:32:08,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656656588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:08,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468499548] [2021-06-12 19:32:08,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:08,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:32:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:32:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:09,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:09,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:32:09,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:32:09,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:09,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:32:09,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:32:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:09,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468499548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:09,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:09,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 19:32:09,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884440730] [2021-06-12 19:32:09,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:09,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:09,256 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:09,368 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-06-12 19:32:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:32:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:09,371 INFO L225 Difference]: With dead ends: 93 [2021-06-12 19:32:09,371 INFO L226 Difference]: Without dead ends: 90 [2021-06-12 19:32:09,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-12 19:32:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-06-12 19:32:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-06-12 19:32:09,381 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-06-12 19:32:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:09,382 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-06-12 19:32:09,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-06-12 19:32:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:32:09,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:09,382 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:09,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:09,599 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-06-12 19:32:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:09,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016000112] [2021-06-12 19:32:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:09,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:09,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016000112] [2021-06-12 19:32:09,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016000112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:09,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328968246] [2021-06-12 19:32:09,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:09,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:32:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:09,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:09,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:32:10,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:32:10,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:10,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:32:10,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:32:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:10,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328968246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:10,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:10,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 19:32:10,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787234929] [2021-06-12 19:32:10,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:10,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:10,077 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:10,146 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-12 19:32:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-12 19:32:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:10,148 INFO L225 Difference]: With dead ends: 103 [2021-06-12 19:32:10,148 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 19:32:10,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 19:32:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-06-12 19:32:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-06-12 19:32:10,163 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-06-12 19:32:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:10,163 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-06-12 19:32:10,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-06-12 19:32:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:32:10,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:10,167 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:10,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:10,389 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-06-12 19:32:10,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:10,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946701974] [2021-06-12 19:32:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:10,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:10,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946701974] [2021-06-12 19:32:10,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946701974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:10,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492545612] [2021-06-12 19:32:10,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:32:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:10,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:10,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:32:10,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:32:10,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:10,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:32:10,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:32:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:10,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492545612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:10,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:10,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 19:32:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135825535] [2021-06-12 19:32:10,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:10,683 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:10,778 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-06-12 19:32:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-12 19:32:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:10,780 INFO L225 Difference]: With dead ends: 113 [2021-06-12 19:32:10,780 INFO L226 Difference]: Without dead ends: 110 [2021-06-12 19:32:10,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-12 19:32:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-06-12 19:32:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-06-12 19:32:10,791 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-06-12 19:32:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:10,791 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-06-12 19:32:10,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-06-12 19:32:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:32:10,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:10,792 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:11,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 19:32:11,005 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-06-12 19:32:11,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:11,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300990095] [2021-06-12 19:32:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:11,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300990095] [2021-06-12 19:32:11,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300990095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160631515] [2021-06-12 19:32:11,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:11,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:11,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:32:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:11,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:11,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:32:11,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:32:11,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:11,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:32:11,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:32:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:11,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160631515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:11,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:11,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 19:32:11,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109997739] [2021-06-12 19:32:11,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:11,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:11,323 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:11,401 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-06-12 19:32:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-12 19:32:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:11,402 INFO L225 Difference]: With dead ends: 124 [2021-06-12 19:32:11,402 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:32:11,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:32:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-06-12 19:32:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-06-12 19:32:11,410 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-06-12 19:32:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:11,411 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-06-12 19:32:11,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-06-12 19:32:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:32:11,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:11,413 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:11,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:11,629 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-06-12 19:32:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:11,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029145789] [2021-06-12 19:32:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:11,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029145789] [2021-06-12 19:32:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029145789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838018535] [2021-06-12 19:32:11,666 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:11,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:11,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:32:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:11,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:11,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:32:11,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:32:11,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:11,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:32:11,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:32:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838018535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:11,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:11,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 19:32:11,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273584663] [2021-06-12 19:32:11,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:11,861 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:11,963 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-06-12 19:32:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:11,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-12 19:32:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:11,965 INFO L225 Difference]: With dead ends: 136 [2021-06-12 19:32:11,965 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:32:11,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:32:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-06-12 19:32:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-06-12 19:32:11,972 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-06-12 19:32:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:11,972 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-06-12 19:32:11,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-06-12 19:32:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:32:11,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:11,973 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:12,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 19:32:12,193 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-06-12 19:32:12,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:12,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393052170] [2021-06-12 19:32:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:12,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:12,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393052170] [2021-06-12 19:32:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393052170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:12,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171629219] [2021-06-12 19:32:12,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:12,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:12,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:32:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:12,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:32:12,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:32:12,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:12,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:32:12,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:32:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171629219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:12,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:12,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 19:32:12,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951581144] [2021-06-12 19:32:12,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:12,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:12,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:12,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:12,485 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:12,564 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-06-12 19:32:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-12 19:32:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:12,566 INFO L225 Difference]: With dead ends: 149 [2021-06-12 19:32:12,566 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:32:12,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:32:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-06-12 19:32:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-12 19:32:12,570 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-06-12 19:32:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:12,570 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-12 19:32:12,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:32:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-12 19:32:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:12,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:12,571 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:12,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:12,793 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-06-12 19:32:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:12,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494186359] [2021-06-12 19:32:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:12,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:12,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494186359] [2021-06-12 19:32:12,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494186359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:12,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507667788] [2021-06-12 19:32:12,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:12,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:32:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:12,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507667788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:12,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:12,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274633555] [2021-06-12 19:32:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:12,922 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:13,042 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-06-12 19:32:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:32:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:13,044 INFO L225 Difference]: With dead ends: 171 [2021-06-12 19:32:13,044 INFO L226 Difference]: Without dead ends: 171 [2021-06-12 19:32:13,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-12 19:32:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-06-12 19:32:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-06-12 19:32:13,047 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-06-12 19:32:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:13,048 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-06-12 19:32:13,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-06-12 19:32:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:13,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:13,048 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:13,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 19:32:13,272 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-06-12 19:32:13,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:13,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678072461] [2021-06-12 19:32:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:13,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:13,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678072461] [2021-06-12 19:32:13,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678072461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:13,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704980324] [2021-06-12 19:32:13,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:13,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:13,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704980324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:13,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:13,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:13,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45653664] [2021-06-12 19:32:13,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:13,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:13,404 INFO L87 Difference]: Start difference. First operand 103 states and 290 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:13,565 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-06-12 19:32:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:32:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:13,567 INFO L225 Difference]: With dead ends: 207 [2021-06-12 19:32:13,567 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 19:32:13,567 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:32:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 19:32:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-06-12 19:32:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-06-12 19:32:13,572 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-06-12 19:32:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:13,572 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-06-12 19:32:13,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-06-12 19:32:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:13,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:13,573 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:13,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 19:32:13,789 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-06-12 19:32:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:13,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103410369] [2021-06-12 19:32:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:13,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103410369] [2021-06-12 19:32:13,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103410369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597380512] [2021-06-12 19:32:13,846 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:13,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597380512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:13,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:13,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494704431] [2021-06-12 19:32:13,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:13,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:13,913 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:14,000 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-06-12 19:32:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:14,001 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:32:14,001 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:32:14,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:32:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-06-12 19:32:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-12 19:32:14,005 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-12 19:32:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:14,006 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-12 19:32:14,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-12 19:32:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:14,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:14,006 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:14,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:14,213 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-06-12 19:32:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:14,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655673530] [2021-06-12 19:32:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:14,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655673530] [2021-06-12 19:32:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655673530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101295346] [2021-06-12 19:32:14,256 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 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 [2021-06-12 19:32:14,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:14,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:14,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101295346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:14,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:14,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:14,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210143783] [2021-06-12 19:32:14,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:14,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:14,335 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:14,381 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-06-12 19:32:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:14,384 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:32:14,384 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 19:32:14,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 19:32:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-06-12 19:32:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-12 19:32:14,390 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-12 19:32:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:14,390 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-12 19:32:14,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-12 19:32:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:14,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:14,393 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:14,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 19:32:14,609 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-06-12 19:32:14,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:14,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450604675] [2021-06-12 19:32:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:14,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:14,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450604675] [2021-06-12 19:32:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450604675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:14,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348340818] [2021-06-12 19:32:14,667 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 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 [2021-06-12 19:32:14,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:14,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348340818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:14,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:14,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:14,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791170048] [2021-06-12 19:32:14,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:14,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:14,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:14,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:14,732 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:14,798 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-06-12 19:32:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:32:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:14,800 INFO L225 Difference]: With dead ends: 211 [2021-06-12 19:32:14,800 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:32:14,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:32:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-06-12 19:32:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-06-12 19:32:14,803 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-06-12 19:32:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:14,803 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-06-12 19:32:14,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-06-12 19:32:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:14,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:14,804 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:15,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:15,005 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:15,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:15,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-06-12 19:32:15,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:15,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926805784] [2021-06-12 19:32:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:15,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926805784] [2021-06-12 19:32:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926805784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146200259] [2021-06-12 19:32:15,050 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 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 [2021-06-12 19:32:15,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:15,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:15,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146200259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:15,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:15,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:15,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805176959] [2021-06-12 19:32:15,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:15,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:15,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:15,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:15,102 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:15,199 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-06-12 19:32:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:15,200 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:15,204 INFO L225 Difference]: With dead ends: 225 [2021-06-12 19:32:15,204 INFO L226 Difference]: Without dead ends: 223 [2021-06-12 19:32:15,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-12 19:32:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-06-12 19:32:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-06-12 19:32:15,209 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-06-12 19:32:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:15,209 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-06-12 19:32:15,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-06-12 19:32:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:15,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:15,210 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:15,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:15,425 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-06-12 19:32:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:15,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783600717] [2021-06-12 19:32:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:15,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:15,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783600717] [2021-06-12 19:32:15,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783600717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:15,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356777350] [2021-06-12 19:32:15,466 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 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 [2021-06-12 19:32:15,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:32:15,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:15,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:15,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356777350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:15,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:15,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:15,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464371457] [2021-06-12 19:32:15,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:15,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:15,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:15,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:15,554 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:15,661 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-06-12 19:32:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:15,663 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:32:15,663 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:32:15,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:32:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-06-12 19:32:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-12 19:32:15,672 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-12 19:32:15,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:15,673 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-12 19:32:15,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-12 19:32:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:15,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:15,674 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:15,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:15,888 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-06-12 19:32:15,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:15,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090616738] [2021-06-12 19:32:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:15,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090616738] [2021-06-12 19:32:15,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090616738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363782594] [2021-06-12 19:32:15,930 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 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 [2021-06-12 19:32:15,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:15,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:15,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363782594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:15,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:15,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:15,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398057253] [2021-06-12 19:32:15,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:15,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:15,998 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:16,044 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-06-12 19:32:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:16,046 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:32:16,046 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:32:16,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:32:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-12 19:32:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-12 19:32:16,050 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-12 19:32:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:16,051 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-12 19:32:16,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-12 19:32:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:16,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:16,051 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:16,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:16,265 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-06-12 19:32:16,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:16,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046200516] [2021-06-12 19:32:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:16,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:16,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046200516] [2021-06-12 19:32:16,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046200516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:16,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383722641] [2021-06-12 19:32:16,320 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 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 [2021-06-12 19:32:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:16,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:16,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383722641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:16,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:16,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399075703] [2021-06-12 19:32:16,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:16,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:16,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:16,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:16,401 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:16,508 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-06-12 19:32:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:16,510 INFO L225 Difference]: With dead ends: 181 [2021-06-12 19:32:16,510 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 19:32:16,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 19:32:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-06-12 19:32:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-12 19:32:16,515 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-12 19:32:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:16,516 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-12 19:32:16,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-12 19:32:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:16,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:16,516 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:16,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-12 19:32:16,728 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-06-12 19:32:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711686247] [2021-06-12 19:32:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:16,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:16,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711686247] [2021-06-12 19:32:16,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711686247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:16,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844006457] [2021-06-12 19:32:16,769 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 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 [2021-06-12 19:32:16,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:16,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844006457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:16,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:16,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:16,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857770743] [2021-06-12 19:32:16,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:16,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:16,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:16,853 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:16,912 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-06-12 19:32:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:16,914 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:32:16,914 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:32:16,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:32:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-06-12 19:32:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-12 19:32:16,918 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-12 19:32:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:16,918 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-12 19:32:16,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-12 19:32:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:16,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:16,919 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:17,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 19:32:17,134 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:17,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-06-12 19:32:17,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:17,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612127045] [2021-06-12 19:32:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:17,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612127045] [2021-06-12 19:32:17,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612127045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949985858] [2021-06-12 19:32:17,189 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 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 [2021-06-12 19:32:17,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:17,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949985858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:17,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:17,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:17,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807837601] [2021-06-12 19:32:17,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:17,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:17,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:17,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:17,264 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:17,321 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-06-12 19:32:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:32:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:17,322 INFO L225 Difference]: With dead ends: 230 [2021-06-12 19:32:17,323 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:32:17,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:32:17,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-06-12 19:32:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-06-12 19:32:17,327 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-06-12 19:32:17,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:17,327 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-06-12 19:32:17,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-06-12 19:32:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:17,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:17,328 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:17,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:17,542 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:17,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-06-12 19:32:17,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:17,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789572319] [2021-06-12 19:32:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:17,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789572319] [2021-06-12 19:32:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789572319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759370110] [2021-06-12 19:32:17,582 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 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 [2021-06-12 19:32:17,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:17,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759370110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:17,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:17,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:17,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738496316] [2021-06-12 19:32:17,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:17,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:17,634 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:17,730 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-06-12 19:32:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:17,732 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:32:17,732 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:32:17,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:32:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-06-12 19:32:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-06-12 19:32:17,737 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-06-12 19:32:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:17,737 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-06-12 19:32:17,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:17,737 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-06-12 19:32:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:17,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:17,738 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:17,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 19:32:17,949 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-06-12 19:32:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:17,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087979149] [2021-06-12 19:32:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:17,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:17,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087979149] [2021-06-12 19:32:17,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087979149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:17,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999257974] [2021-06-12 19:32:17,988 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:18,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:32:18,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:18,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999257974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:18,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:18,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:18,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416727485] [2021-06-12 19:32:18,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:18,077 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:18,182 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-06-12 19:32:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:18,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:18,184 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:32:18,184 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:32:18,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:32:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-06-12 19:32:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-12 19:32:18,190 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-12 19:32:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:18,191 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-12 19:32:18,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-12 19:32:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:18,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:18,192 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:18,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:18,415 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:18,415 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-06-12 19:32:18,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:18,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212664585] [2021-06-12 19:32:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:18,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212664585] [2021-06-12 19:32:18,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212664585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139802519] [2021-06-12 19:32:18,465 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:18,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:18,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:18,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139802519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:18,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:18,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:18,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552502597] [2021-06-12 19:32:18,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:18,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:18,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:18,530 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:18,573 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-06-12 19:32:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:18,574 INFO L225 Difference]: With dead ends: 244 [2021-06-12 19:32:18,574 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 19:32:18,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 19:32:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-06-12 19:32:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-12 19:32:18,579 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-12 19:32:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:18,579 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-12 19:32:18,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-12 19:32:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:18,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:18,580 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:18,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 19:32:18,793 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-06-12 19:32:18,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:18,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592346186] [2021-06-12 19:32:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:18,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:18,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592346186] [2021-06-12 19:32:18,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592346186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:18,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552857511] [2021-06-12 19:32:18,836 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:18,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552857511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:18,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:18,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964816892] [2021-06-12 19:32:18,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:18,923 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:19,025 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-06-12 19:32:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:19,026 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:32:19,026 INFO L226 Difference]: Without dead ends: 232 [2021-06-12 19:32:19,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-12 19:32:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-06-12 19:32:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-12 19:32:19,032 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-12 19:32:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:19,032 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-12 19:32:19,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-12 19:32:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:19,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:19,033 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:19,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:19,249 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-06-12 19:32:19,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:19,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527659897] [2021-06-12 19:32:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:19,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:19,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527659897] [2021-06-12 19:32:19,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527659897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:19,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390665585] [2021-06-12 19:32:19,286 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:19,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:19,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:19,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390665585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:19,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:19,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:19,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859061385] [2021-06-12 19:32:19,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:19,350 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:19,440 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-06-12 19:32:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:19,442 INFO L225 Difference]: With dead ends: 257 [2021-06-12 19:32:19,442 INFO L226 Difference]: Without dead ends: 257 [2021-06-12 19:32:19,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-12 19:32:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-06-12 19:32:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-12 19:32:19,446 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-12 19:32:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:19,447 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-12 19:32:19,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-12 19:32:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:19,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:19,447 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:19,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:19,657 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:19,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-06-12 19:32:19,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:19,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623256052] [2021-06-12 19:32:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:19,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623256052] [2021-06-12 19:32:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623256052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233326924] [2021-06-12 19:32:19,703 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:19,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:19,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:19,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:32:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:19,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233326924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:19,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:19,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-12 19:32:19,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596441472] [2021-06-12 19:32:19,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:32:19,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:32:19,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:19,816 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-12 19:32:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:20,110 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-06-12 19:32:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:32:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 16 [2021-06-12 19:32:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:20,112 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:32:20,112 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 19:32:20,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:32:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 19:32:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-06-12 19:32:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-06-12 19:32:20,117 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-06-12 19:32:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:20,117 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-06-12 19:32:20,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-12 19:32:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-06-12 19:32:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:20,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:20,118 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:20,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:20,319 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:20,319 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-06-12 19:32:20,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:20,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336224552] [2021-06-12 19:32:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:20,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:20,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336224552] [2021-06-12 19:32:20,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336224552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776647838] [2021-06-12 19:32:20,365 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:20,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:20,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:20,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776647838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:20,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:20,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:20,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241591040] [2021-06-12 19:32:20,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:20,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:20,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:20,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:20,443 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:20,537 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-06-12 19:32:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:20,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:20,538 INFO L225 Difference]: With dead ends: 353 [2021-06-12 19:32:20,539 INFO L226 Difference]: Without dead ends: 353 [2021-06-12 19:32:20,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:20,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-12 19:32:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-06-12 19:32:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-06-12 19:32:20,545 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-06-12 19:32:20,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:20,545 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-06-12 19:32:20,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-06-12 19:32:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:20,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:20,546 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:20,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:20,761 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-06-12 19:32:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744753995] [2021-06-12 19:32:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:20,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:20,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744753995] [2021-06-12 19:32:20,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744753995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:20,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350862646] [2021-06-12 19:32:20,809 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:20,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:32:20,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350862646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:20,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:20,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969816301] [2021-06-12 19:32:20,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:20,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:20,876 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:20,963 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-06-12 19:32:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:20,965 INFO L225 Difference]: With dead ends: 342 [2021-06-12 19:32:20,965 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 19:32:20,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 19:32:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-06-12 19:32:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-12 19:32:20,973 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-12 19:32:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:20,973 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-12 19:32:20,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-12 19:32:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:20,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:20,974 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:21,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:21,189 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-06-12 19:32:21,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:21,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873559] [2021-06-12 19:32:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:21,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873559] [2021-06-12 19:32:21,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289147234] [2021-06-12 19:32:21,243 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:21,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:21,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289147234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:21,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:21,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:21,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097321689] [2021-06-12 19:32:21,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:21,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:21,304 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:21,347 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-06-12 19:32:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:21,349 INFO L225 Difference]: With dead ends: 348 [2021-06-12 19:32:21,349 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 19:32:21,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 19:32:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-06-12 19:32:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-12 19:32:21,355 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-12 19:32:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:21,355 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-12 19:32:21,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-12 19:32:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:21,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:21,356 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:21,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 19:32:21,577 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-06-12 19:32:21,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:21,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164815400] [2021-06-12 19:32:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164815400] [2021-06-12 19:32:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164815400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996804264] [2021-06-12 19:32:21,612 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996804264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:21,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:21,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238443142] [2021-06-12 19:32:21,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:21,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:21,695 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:21,767 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-06-12 19:32:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:21,769 INFO L225 Difference]: With dead ends: 362 [2021-06-12 19:32:21,769 INFO L226 Difference]: Without dead ends: 362 [2021-06-12 19:32:21,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-12 19:32:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-06-12 19:32:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-12 19:32:21,776 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-12 19:32:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:21,776 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-12 19:32:21,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-12 19:32:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:21,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:21,777 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:21,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 19:32:21,992 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-06-12 19:32:21,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:21,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396476461] [2021-06-12 19:32:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:22,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396476461] [2021-06-12 19:32:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396476461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:22,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768869596] [2021-06-12 19:32:22,035 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:22,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768869596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:22,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:22,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924981222] [2021-06-12 19:32:22,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:22,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:22,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:22,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:22,097 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:22,180 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-06-12 19:32:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:22,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:22,182 INFO L225 Difference]: With dead ends: 346 [2021-06-12 19:32:22,182 INFO L226 Difference]: Without dead ends: 346 [2021-06-12 19:32:22,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:32:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-12 19:32:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-06-12 19:32:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-12 19:32:22,188 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-12 19:32:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:22,188 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-12 19:32:22,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-12 19:32:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:22,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:22,189 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:22,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 19:32:22,411 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-06-12 19:32:22,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:22,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905494224] [2021-06-12 19:32:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:22,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:22,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905494224] [2021-06-12 19:32:22,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905494224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:22,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946575821] [2021-06-12 19:32:22,451 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:22,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:22,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:22,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946575821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:22,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:22,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:22,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492979592] [2021-06-12 19:32:22,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:22,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:22,513 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:22,628 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-06-12 19:32:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:22,630 INFO L225 Difference]: With dead ends: 402 [2021-06-12 19:32:22,630 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 19:32:22,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:32:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 19:32:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-06-12 19:32:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-06-12 19:32:22,647 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-06-12 19:32:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:22,647 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-06-12 19:32:22,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-06-12 19:32:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:22,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:22,648 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:22,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 19:32:22,871 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-06-12 19:32:22,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:22,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004272070] [2021-06-12 19:32:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:22,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004272070] [2021-06-12 19:32:22,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004272070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409608999] [2021-06-12 19:32:22,912 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:22,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:22,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:22,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409608999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:22,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:22,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448478872] [2021-06-12 19:32:22,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:22,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:22,963 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:23,058 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-06-12 19:32:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:23,060 INFO L225 Difference]: With dead ends: 396 [2021-06-12 19:32:23,061 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 19:32:23,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 19:32:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-06-12 19:32:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-06-12 19:32:23,069 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-06-12 19:32:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:23,069 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-06-12 19:32:23,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-06-12 19:32:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:23,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:23,070 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:23,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:23,292 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:23,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-06-12 19:32:23,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:23,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605180257] [2021-06-12 19:32:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605180257] [2021-06-12 19:32:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605180257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607815492] [2021-06-12 19:32:23,332 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:23,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:32:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:23,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607815492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:23,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:23,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:23,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963253204] [2021-06-12 19:32:23,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:23,388 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:23,422 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-06-12 19:32:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:23,424 INFO L225 Difference]: With dead ends: 394 [2021-06-12 19:32:23,424 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 19:32:23,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 19:32:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-06-12 19:32:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-06-12 19:32:23,439 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-06-12 19:32:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:23,439 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-06-12 19:32:23,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-06-12 19:32:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:23,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:23,440 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:23,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 19:32:23,657 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-06-12 19:32:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636232069] [2021-06-12 19:32:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:23,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:23,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636232069] [2021-06-12 19:32:23,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636232069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:23,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965508001] [2021-06-12 19:32:23,696 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:23,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:23,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965508001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:23,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:23,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:23,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186102809] [2021-06-12 19:32:23,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:23,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:23,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:23,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:23,761 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:23,830 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-06-12 19:32:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:23,832 INFO L225 Difference]: With dead ends: 402 [2021-06-12 19:32:23,832 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 19:32:23,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 19:32:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-06-12 19:32:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-12 19:32:23,838 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-12 19:32:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:23,839 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-12 19:32:23,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-12 19:32:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:23,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:23,840 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:24,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-12 19:32:24,062 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:24,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-06-12 19:32:24,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:24,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463146107] [2021-06-12 19:32:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:24,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:24,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463146107] [2021-06-12 19:32:24,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463146107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:24,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909469554] [2021-06-12 19:32:24,101 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909469554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:24,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:24,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676343415] [2021-06-12 19:32:24,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:24,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:24,179 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:24,256 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-06-12 19:32:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:24,258 INFO L225 Difference]: With dead ends: 379 [2021-06-12 19:32:24,258 INFO L226 Difference]: Without dead ends: 379 [2021-06-12 19:32:24,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:32:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-12 19:32:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-06-12 19:32:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-12 19:32:24,264 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-12 19:32:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:24,264 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-12 19:32:24,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-12 19:32:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:24,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:24,265 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:24,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:24,489 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-06-12 19:32:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:24,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438174638] [2021-06-12 19:32:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:24,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:24,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438174638] [2021-06-12 19:32:24,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438174638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:24,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187485134] [2021-06-12 19:32:24,526 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:24,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:24,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:24,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187485134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:24,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:24,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949441931] [2021-06-12 19:32:24,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:24,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:24,589 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:24,683 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-06-12 19:32:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:32:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:24,684 INFO L225 Difference]: With dead ends: 381 [2021-06-12 19:32:24,684 INFO L226 Difference]: Without dead ends: 381 [2021-06-12 19:32:24,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:32:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-12 19:32:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-06-12 19:32:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-12 19:32:24,690 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-12 19:32:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:24,690 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-12 19:32:24,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-12 19:32:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:24,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:24,691 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:24,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:24,908 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-06-12 19:32:24,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:24,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141938122] [2021-06-12 19:32:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:24,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:24,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141938122] [2021-06-12 19:32:24,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141938122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:24,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010869692] [2021-06-12 19:32:24,957 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:24,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:24,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:24,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:25,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010869692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:25,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:25,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:32:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425633785] [2021-06-12 19:32:25,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:25,019 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:25,149 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-06-12 19:32:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:32:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-06-12 19:32:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:25,150 INFO L225 Difference]: With dead ends: 438 [2021-06-12 19:32:25,150 INFO L226 Difference]: Without dead ends: 438 [2021-06-12 19:32:25,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:32:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-12 19:32:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-12 19:32:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-12 19:32:25,157 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-06-12 19:32:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:25,157 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-12 19:32:25,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-12 19:32:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:25,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:25,158 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:25,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:25,374 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-06-12 19:32:25,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:25,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85112736] [2021-06-12 19:32:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:25,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:25,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85112736] [2021-06-12 19:32:25,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85112736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:25,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976283485] [2021-06-12 19:32:25,427 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:25,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:25,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976283485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:25,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:25,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-12 19:32:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399504328] [2021-06-12 19:32:25,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:25,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:25,485 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:25,583 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-06-12 19:32:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:32:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:32:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:25,585 INFO L225 Difference]: With dead ends: 446 [2021-06-12 19:32:25,585 INFO L226 Difference]: Without dead ends: 444 [2021-06-12 19:32:25,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-12 19:32:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-06-12 19:32:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-06-12 19:32:25,592 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-06-12 19:32:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:25,592 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-06-12 19:32:25,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-06-12 19:32:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:25,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:25,593 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:25,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:25,809 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-06-12 19:32:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:25,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458070970] [2021-06-12 19:32:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:25,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:25,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458070970] [2021-06-12 19:32:25,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458070970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:25,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431312460] [2021-06-12 19:32:25,866 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:25,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:32:25,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:25,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:25,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431312460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:25,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:25,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-12 19:32:25,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755658536] [2021-06-12 19:32:25,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:25,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:25,927 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:26,009 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-06-12 19:32:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:32:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:32:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:26,011 INFO L225 Difference]: With dead ends: 432 [2021-06-12 19:32:26,011 INFO L226 Difference]: Without dead ends: 432 [2021-06-12 19:32:26,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:32:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-12 19:32:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-06-12 19:32:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-12 19:32:26,016 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-06-12 19:32:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:26,016 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-12 19:32:26,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-12 19:32:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:26,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:26,017 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:26,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:26,233 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-06-12 19:32:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:26,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729801005] [2021-06-12 19:32:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:26,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:26,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729801005] [2021-06-12 19:32:26,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729801005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:26,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072186342] [2021-06-12 19:32:26,279 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:26,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:32:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:26,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072186342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:26,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:26,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 19:32:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674995319] [2021-06-12 19:32:26,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:26,348 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:26,458 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-06-12 19:32:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:32:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:32:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:26,460 INFO L225 Difference]: With dead ends: 438 [2021-06-12 19:32:26,460 INFO L226 Difference]: Without dead ends: 438 [2021-06-12 19:32:26,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:32:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-12 19:32:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-06-12 19:32:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-06-12 19:32:26,466 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-06-12 19:32:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:26,466 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-06-12 19:32:26,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-06-12 19:32:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:26,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:26,467 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 19:32:26,689 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-06-12 19:32:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099964754] [2021-06-12 19:32:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:26,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:26,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099964754] [2021-06-12 19:32:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099964754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:26,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237696949] [2021-06-12 19:32:26,732 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:26,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237696949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:26,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:26,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 19:32:26,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723340170] [2021-06-12 19:32:26,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:26,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:26,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:26,801 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:26,966 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-06-12 19:32:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:32:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:32:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:26,968 INFO L225 Difference]: With dead ends: 417 [2021-06-12 19:32:26,968 INFO L226 Difference]: Without dead ends: 417 [2021-06-12 19:32:26,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:32:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-12 19:32:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-06-12 19:32:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-12 19:32:26,974 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-06-12 19:32:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:26,974 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-12 19:32:26,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-12 19:32:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:26,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:26,975 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:27,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 19:32:27,198 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-06-12 19:32:27,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:27,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089288354] [2021-06-12 19:32:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:27,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:27,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089288354] [2021-06-12 19:32:27,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089288354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:27,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438781603] [2021-06-12 19:32:27,243 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:27,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438781603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:27,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:27,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 19:32:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882716813] [2021-06-12 19:32:27,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:27,316 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:27,446 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-06-12 19:32:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:32:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:32:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:27,448 INFO L225 Difference]: With dead ends: 404 [2021-06-12 19:32:27,448 INFO L226 Difference]: Without dead ends: 404 [2021-06-12 19:32:27,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:32:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-12 19:32:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-06-12 19:32:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-06-12 19:32:27,453 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-06-12 19:32:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:27,453 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-06-12 19:32:27,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-06-12 19:32:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:27,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:27,454 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:27,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:27,665 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-06-12 19:32:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727119181] [2021-06-12 19:32:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:27,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:27,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727119181] [2021-06-12 19:32:27,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727119181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:27,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676944883] [2021-06-12 19:32:27,712 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:27,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:32:27,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:27,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676944883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:27,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:27,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 19:32:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725201606] [2021-06-12 19:32:27,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:27,783 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:27,918 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-06-12 19:32:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:32:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:32:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:27,920 INFO L225 Difference]: With dead ends: 408 [2021-06-12 19:32:27,920 INFO L226 Difference]: Without dead ends: 408 [2021-06-12 19:32:27,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:32:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-12 19:32:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-06-12 19:32:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-06-12 19:32:27,926 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-06-12 19:32:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:27,926 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-06-12 19:32:27,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-06-12 19:32:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:32:27,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:27,927 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:28,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-12 19:32:28,141 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-06-12 19:32:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:28,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739492872] [2021-06-12 19:32:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:28,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739492872] [2021-06-12 19:32:28,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739492872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217966066] [2021-06-12 19:32:28,197 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:28,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217966066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 19:32:28,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596137535] [2021-06-12 19:32:28,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:32:28,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:32:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:28,300 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:28,506 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-06-12 19:32:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:32:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 16 [2021-06-12 19:32:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:28,509 INFO L225 Difference]: With dead ends: 465 [2021-06-12 19:32:28,509 INFO L226 Difference]: Without dead ends: 465 [2021-06-12 19:32:28,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:32:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-12 19:32:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-06-12 19:32:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-06-12 19:32:28,518 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-06-12 19:32:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:28,519 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-06-12 19:32:28,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-06-12 19:32:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:28,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:28,519 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:28,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:28,733 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-06-12 19:32:28,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:28,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848735053] [2021-06-12 19:32:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:28,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:28,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848735053] [2021-06-12 19:32:28,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848735053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:28,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686895353] [2021-06-12 19:32:28,777 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:28,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:32:28,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:28,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:32:28,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686895353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:28,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:28,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-12 19:32:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346245138] [2021-06-12 19:32:28,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:28,838 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:28,883 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-06-12 19:32:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:32:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:32:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:28,885 INFO L225 Difference]: With dead ends: 414 [2021-06-12 19:32:28,885 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 19:32:28,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 19:32:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-12 19:32:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-06-12 19:32:28,891 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-06-12 19:32:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:28,892 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-06-12 19:32:28,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-06-12 19:32:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:28,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:28,893 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:29,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:29,116 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-06-12 19:32:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:29,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083813246] [2021-06-12 19:32:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:29,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083813246] [2021-06-12 19:32:29,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083813246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974334003] [2021-06-12 19:32:29,159 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:29,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:32:29,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:29,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:29,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974334003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:29,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:29,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-12 19:32:29,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857077175] [2021-06-12 19:32:29,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:29,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:29,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:29,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:29,221 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:29,305 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-06-12 19:32:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:29,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:29,306 INFO L225 Difference]: With dead ends: 409 [2021-06-12 19:32:29,306 INFO L226 Difference]: Without dead ends: 407 [2021-06-12 19:32:29,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-12 19:32:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-12 19:32:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-12 19:32:29,312 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-06-12 19:32:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:29,312 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-12 19:32:29,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-12 19:32:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:29,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:29,313 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:29,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:29,529 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-06-12 19:32:29,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:29,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939995130] [2021-06-12 19:32:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:29,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939995130] [2021-06-12 19:32:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939995130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578942218] [2021-06-12 19:32:29,570 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:29,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578942218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:29,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:29,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 19:32:29,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367134601] [2021-06-12 19:32:29,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:29,648 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:29,758 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-06-12 19:32:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:29,760 INFO L225 Difference]: With dead ends: 414 [2021-06-12 19:32:29,760 INFO L226 Difference]: Without dead ends: 411 [2021-06-12 19:32:29,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:32:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-12 19:32:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-06-12 19:32:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-12 19:32:29,766 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-06-12 19:32:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:29,766 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-12 19:32:29,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-12 19:32:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:29,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:29,767 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:29,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:29,990 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-06-12 19:32:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:29,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078033531] [2021-06-12 19:32:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:30,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:30,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078033531] [2021-06-12 19:32:30,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078033531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:30,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951369052] [2021-06-12 19:32:30,037 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:30,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:30,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:30,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951369052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:30,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:30,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 19:32:30,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856974516] [2021-06-12 19:32:30,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:30,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:30,104 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:30,173 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-06-12 19:32:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:32:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:30,174 INFO L225 Difference]: With dead ends: 367 [2021-06-12 19:32:30,174 INFO L226 Difference]: Without dead ends: 364 [2021-06-12 19:32:30,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-12 19:32:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-06-12 19:32:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-06-12 19:32:30,178 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-06-12 19:32:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:30,178 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-06-12 19:32:30,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-06-12 19:32:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:30,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:30,179 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:30,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:30,381 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-06-12 19:32:30,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:30,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686971819] [2021-06-12 19:32:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:30,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686971819] [2021-06-12 19:32:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686971819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118026317] [2021-06-12 19:32:30,432 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:30,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:32:30,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:32:30,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:30,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118026317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:30,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:30,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:32:30,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455316424] [2021-06-12 19:32:30,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:30,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:30,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:30,502 INFO L87 Difference]: Start difference. First operand 323 states and 961 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:30,561 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-06-12 19:32:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:30,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:32:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:30,563 INFO L225 Difference]: With dead ends: 355 [2021-06-12 19:32:30,563 INFO L226 Difference]: Without dead ends: 351 [2021-06-12 19:32:30,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-12 19:32:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-06-12 19:32:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-06-12 19:32:30,570 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-06-12 19:32:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:30,570 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-06-12 19:32:30,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-06-12 19:32:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:30,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:30,571 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:30,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:30,794 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-06-12 19:32:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:30,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943794752] [2021-06-12 19:32:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:30,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:30,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943794752] [2021-06-12 19:32:30,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943794752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:30,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894272192] [2021-06-12 19:32:30,838 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:30,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:32:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:30,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894272192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:30,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:30,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:32:30,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124960514] [2021-06-12 19:32:30,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:32:30,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:32:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:32:30,899 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:30,938 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-06-12 19:32:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:30,940 INFO L225 Difference]: With dead ends: 443 [2021-06-12 19:32:30,940 INFO L226 Difference]: Without dead ends: 443 [2021-06-12 19:32:30,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-12 19:32:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-06-12 19:32:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-06-12 19:32:30,950 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-06-12 19:32:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:30,950 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-06-12 19:32:30,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-06-12 19:32:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:30,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:30,951 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:31,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 19:32:31,174 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-06-12 19:32:31,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:31,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317692709] [2021-06-12 19:32:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:31,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:31,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317692709] [2021-06-12 19:32:31,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317692709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:31,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272666408] [2021-06-12 19:32:31,217 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:31,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:32:31,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:32:31,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272666408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:31,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:31,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-12 19:32:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667222451] [2021-06-12 19:32:31,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:31,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:31,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:31,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:31,269 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:31,311 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-06-12 19:32:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:32:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:31,312 INFO L225 Difference]: With dead ends: 430 [2021-06-12 19:32:31,312 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 19:32:31,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 19:32:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-12 19:32:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-06-12 19:32:31,317 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-06-12 19:32:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-06-12 19:32:31,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-06-12 19:32:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:31,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:31,318 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:31,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 19:32:31,537 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-06-12 19:32:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:31,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339850122] [2021-06-12 19:32:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:31,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339850122] [2021-06-12 19:32:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339850122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388124416] [2021-06-12 19:32:31,585 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:31,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:32:31,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388124416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:31,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:31,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-12 19:32:31,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396025831] [2021-06-12 19:32:31,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:32:31,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:31,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:32:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:32:31,643 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:31,726 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-06-12 19:32:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:31,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:31,728 INFO L225 Difference]: With dead ends: 428 [2021-06-12 19:32:31,728 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 19:32:31,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 19:32:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-06-12 19:32:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-12 19:32:31,734 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-06-12 19:32:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:31,734 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-12 19:32:31,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-12 19:32:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:31,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:31,735 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:31,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 19:32:31,945 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-06-12 19:32:31,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:31,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349755014] [2021-06-12 19:32:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:31,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349755014] [2021-06-12 19:32:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349755014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55796993] [2021-06-12 19:32:31,990 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:32,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:32,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55796993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:32,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:32,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 19:32:32,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476883330] [2021-06-12 19:32:32,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:32,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:32,047 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:32,142 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-06-12 19:32:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:32,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:32,144 INFO L225 Difference]: With dead ends: 433 [2021-06-12 19:32:32,144 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 19:32:32,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:32:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 19:32:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-12 19:32:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-12 19:32:32,150 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-06-12 19:32:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:32,150 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-12 19:32:32,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-12 19:32:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:32,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:32,151 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:32,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 19:32:32,365 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-06-12 19:32:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:32,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463363060] [2021-06-12 19:32:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:32,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463363060] [2021-06-12 19:32:32,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463363060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657295038] [2021-06-12 19:32:32,414 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:32,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:32,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:32,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657295038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:32,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:32,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 19:32:32,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209791393] [2021-06-12 19:32:32,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:32,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:32,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:32,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:32,470 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:32,537 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-06-12 19:32:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:32,539 INFO L225 Difference]: With dead ends: 386 [2021-06-12 19:32:32,539 INFO L226 Difference]: Without dead ends: 383 [2021-06-12 19:32:32,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-12 19:32:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-06-12 19:32:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-06-12 19:32:32,544 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-06-12 19:32:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:32,544 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-06-12 19:32:32,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-06-12 19:32:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:32,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:32,545 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:32,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:32,753 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:32,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-06-12 19:32:32,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:32,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732909110] [2021-06-12 19:32:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:32,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:32,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732909110] [2021-06-12 19:32:32,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732909110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:32,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308339823] [2021-06-12 19:32:32,841 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:32,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:32:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:32,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308339823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:32,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:32,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:32:32,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498095429] [2021-06-12 19:32:32,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:32,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:32,907 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:32,996 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-06-12 19:32:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:32:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:32:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:32,997 INFO L225 Difference]: With dead ends: 385 [2021-06-12 19:32:32,997 INFO L226 Difference]: Without dead ends: 381 [2021-06-12 19:32:32,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-12 19:32:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-06-12 19:32:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-06-12 19:32:33,005 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-06-12 19:32:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:33,005 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-06-12 19:32:33,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-06-12 19:32:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:33,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:33,006 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:33,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 19:32:33,221 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-06-12 19:32:33,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:33,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049089120] [2021-06-12 19:32:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:33,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:33,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049089120] [2021-06-12 19:32:33,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049089120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:33,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307307099] [2021-06-12 19:32:33,266 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:33,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:33,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:33,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307307099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:33,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:33,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 19:32:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739295309] [2021-06-12 19:32:33,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:33,332 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:33,420 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-06-12 19:32:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 17 [2021-06-12 19:32:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:33,422 INFO L225 Difference]: With dead ends: 372 [2021-06-12 19:32:33,422 INFO L226 Difference]: Without dead ends: 367 [2021-06-12 19:32:33,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-12 19:32:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-06-12 19:32:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-06-12 19:32:33,428 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-06-12 19:32:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:33,428 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-06-12 19:32:33,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-06-12 19:32:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:33,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:33,429 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:33,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:33,649 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-06-12 19:32:33,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:33,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571836021] [2021-06-12 19:32:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:33,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571836021] [2021-06-12 19:32:33,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571836021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476783009] [2021-06-12 19:32:33,701 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:33,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:32:33,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:33,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:33,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476783009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:33,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:33,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-12 19:32:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754725749] [2021-06-12 19:32:33,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:32:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:32:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:33,755 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:33,813 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-06-12 19:32:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:33,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:32:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:33,815 INFO L225 Difference]: With dead ends: 518 [2021-06-12 19:32:33,815 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 19:32:33,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:32:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 19:32:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-06-12 19:32:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-06-12 19:32:33,822 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-06-12 19:32:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:33,822 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-06-12 19:32:33,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-06-12 19:32:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:33,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:33,823 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:34,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 19:32:34,033 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-06-12 19:32:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:34,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119511208] [2021-06-12 19:32:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:34,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119511208] [2021-06-12 19:32:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119511208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871112344] [2021-06-12 19:32:34,084 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:34,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:32:34,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:34,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:32:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:34,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871112344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:34,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:34,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 19:32:34,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753041897] [2021-06-12 19:32:34,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:32:34,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:32:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:32:34,136 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:34,223 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-06-12 19:32:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 17 [2021-06-12 19:32:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:34,224 INFO L225 Difference]: With dead ends: 496 [2021-06-12 19:32:34,225 INFO L226 Difference]: Without dead ends: 494 [2021-06-12 19:32:34,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-12 19:32:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-06-12 19:32:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-12 19:32:34,231 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-06-12 19:32:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:34,231 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-12 19:32:34,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-12 19:32:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:34,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:34,232 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:34,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:34,433 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-06-12 19:32:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:34,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378085606] [2021-06-12 19:32:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:34,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:34,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378085606] [2021-06-12 19:32:34,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378085606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:34,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274966151] [2021-06-12 19:32:34,491 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:34,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274966151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:34,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:34,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 19:32:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96978600] [2021-06-12 19:32:34,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:32:34,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:34,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:32:34,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:34,570 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:32:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:34,702 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-06-12 19:32:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:32:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 17 [2021-06-12 19:32:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:34,704 INFO L225 Difference]: With dead ends: 501 [2021-06-12 19:32:34,704 INFO L226 Difference]: Without dead ends: 498 [2021-06-12 19:32:34,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:32:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-12 19:32:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-06-12 19:32:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-06-12 19:32:34,711 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-06-12 19:32:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:34,711 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-06-12 19:32:34,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:32:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-06-12 19:32:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:34,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:34,712 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:34,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:34,935 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-06-12 19:32:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:34,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268174887] [2021-06-12 19:32:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:34,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:34,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268174887] [2021-06-12 19:32:34,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268174887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:34,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546818675] [2021-06-12 19:32:34,987 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:35,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:35,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:35,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546818675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:35,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:35,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 19:32:35,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498676932] [2021-06-12 19:32:35,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:32:35,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:32:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:35,049 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:32:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:35,140 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-06-12 19:32:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:32:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 17 [2021-06-12 19:32:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:35,141 INFO L225 Difference]: With dead ends: 453 [2021-06-12 19:32:35,141 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 19:32:35,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:32:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 19:32:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-06-12 19:32:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-06-12 19:32:35,148 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-06-12 19:32:35,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:35,148 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-06-12 19:32:35,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:32:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-06-12 19:32:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:35,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:35,149 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:35,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:35,349 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-06-12 19:32:35,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:35,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813592631] [2021-06-12 19:32:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:35,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:35,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813592631] [2021-06-12 19:32:35,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813592631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:35,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616319072] [2021-06-12 19:32:35,393 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:35,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:32:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:32:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:35,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616319072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:35,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:35,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 19:32:35,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401378874] [2021-06-12 19:32:35,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:32:35,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:32:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:35,485 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:35,574 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-06-12 19:32:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:32:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 17 [2021-06-12 19:32:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:35,575 INFO L225 Difference]: With dead ends: 450 [2021-06-12 19:32:35,575 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 19:32:35,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:32:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 19:32:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-06-12 19:32:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-06-12 19:32:35,581 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-06-12 19:32:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:35,581 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-06-12 19:32:35,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-06-12 19:32:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:35,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:35,582 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:35,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 19:32:35,796 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-06-12 19:32:35,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:35,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310977250] [2021-06-12 19:32:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:35,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:35,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310977250] [2021-06-12 19:32:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310977250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:35,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387061338] [2021-06-12 19:32:35,844 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:35,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:32:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387061338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:35,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:35,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 19:32:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213318045] [2021-06-12 19:32:35,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:32:35,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:32:35,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:32:35,918 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:32:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:36,003 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-06-12 19:32:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:32:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 17 [2021-06-12 19:32:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:36,004 INFO L225 Difference]: With dead ends: 444 [2021-06-12 19:32:36,004 INFO L226 Difference]: Without dead ends: 439 [2021-06-12 19:32:36,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:32:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-12 19:32:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-06-12 19:32:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-06-12 19:32:36,009 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-06-12 19:32:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:36,009 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-06-12 19:32:36,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:32:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-06-12 19:32:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:32:36,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:36,009 INFO L472 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:36,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 19:32:36,210 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-06-12 19:32:36,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:36,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326550926] [2021-06-12 19:32:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:36,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326550926] [2021-06-12 19:32:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326550926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684080029] [2021-06-12 19:32:36,264 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:36,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:32:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:32:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:32:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684080029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:36,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:36,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:32:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608982330] [2021-06-12 19:32:36,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:32:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:32:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:32:36,330 INFO L87 Difference]: Start difference. First operand 390 states and 1204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:36,411 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-06-12 19:32:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:32:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:32:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:36,412 INFO L225 Difference]: With dead ends: 435 [2021-06-12 19:32:36,412 INFO L226 Difference]: Without dead ends: 429 [2021-06-12 19:32:36,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:32:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-12 19:32:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-06-12 19:32:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-06-12 19:32:36,416 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-06-12 19:32:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:36,416 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-06-12 19:32:36,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-06-12 19:32:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:32:36,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:36,417 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:36,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 19:32:36,618 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-06-12 19:32:36,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:36,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363873291] [2021-06-12 19:32:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:32:36,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:36,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363873291] [2021-06-12 19:32:36,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363873291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:36,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075057076] [2021-06-12 19:32:36,719 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:36,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:32:36,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:32:36,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:32:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075057076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:36,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:32:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464153122] [2021-06-12 19:32:36,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:32:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:32:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:32:36,874 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-06-12 19:32:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:36,989 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-06-12 19:32:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:32:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 18 [2021-06-12 19:32:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:36,991 INFO L225 Difference]: With dead ends: 721 [2021-06-12 19:32:36,991 INFO L226 Difference]: Without dead ends: 721 [2021-06-12 19:32:36,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:32:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-12 19:32:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-06-12 19:32:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-06-12 19:32:37,009 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-06-12 19:32:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:37,009 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-06-12 19:32:37,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-06-12 19:32:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-06-12 19:32:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:32:37,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:37,010 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:37,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 19:32:37,211 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:37,212 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-06-12 19:32:37,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:37,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290122404] [2021-06-12 19:32:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:32:37,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290122404] [2021-06-12 19:32:37,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290122404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:37,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478383034] [2021-06-12 19:32:37,315 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:32:37,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:32:37,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478383034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:37,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:37,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:32:37,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597151161] [2021-06-12 19:32:37,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:32:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:37,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:32:37,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:37,453 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:37,576 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-06-12 19:32:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:32:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 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 19 [2021-06-12 19:32:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:37,578 INFO L225 Difference]: With dead ends: 819 [2021-06-12 19:32:37,578 INFO L226 Difference]: Without dead ends: 819 [2021-06-12 19:32:37,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:32:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-12 19:32:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-06-12 19:32:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-06-12 19:32:37,587 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-06-12 19:32:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:37,587 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-06-12 19:32:37,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-06-12 19:32:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:32:37,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:37,588 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:37,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 19:32:37,805 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-06-12 19:32:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:37,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289155074] [2021-06-12 19:32:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:32:37,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289155074] [2021-06-12 19:32:37,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289155074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:37,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099855555] [2021-06-12 19:32:37,927 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:37,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:32:37,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:32:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:32:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099855555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:38,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:32:38,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:32:38,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318998491] [2021-06-12 19:32:38,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:32:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:32:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:32:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:32:38,077 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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) [2021-06-12 19:32:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:32:38,241 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-06-12 19:32:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:32:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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 20 [2021-06-12 19:32:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:32:38,243 INFO L225 Difference]: With dead ends: 928 [2021-06-12 19:32:38,243 INFO L226 Difference]: Without dead ends: 927 [2021-06-12 19:32:38,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:32:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-12 19:32:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-06-12 19:32:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:32:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-06-12 19:32:38,253 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-06-12 19:32:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:32:38,253 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-06-12 19:32:38,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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) [2021-06-12 19:32:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-06-12 19:32:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:32:38,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:32:38,254 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:32:38,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:38,455 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:32:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:32:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-06-12 19:32:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:32:38,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456874100] [2021-06-12 19:32:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:32:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:32:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:32:38,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:32:38,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456874100] [2021-06-12 19:32:38,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456874100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:32:38,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369532201] [2021-06-12 19:32:38,536 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:32:38,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:32:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:32:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:32:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:32:38,984 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:32:38,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:32:38,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:32:39,768 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 198 [2021-06-12 19:32:40,576 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 262 [2021-06-12 19:32:40,716 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 276 [2021-06-12 19:32:40,967 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 373 [2021-06-12 19:32:41,306 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 405 [2021-06-12 19:32:42,670 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 222 [2021-06-12 19:32:42,968 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 320 [2021-06-12 19:32:43,597 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-12 19:32:44,136 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-12 19:32:44,762 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 564 [2021-06-12 19:32:45,868 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 566 DAG size of output: 640 [2021-06-12 19:32:46,343 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 490 [2021-06-12 19:32:47,074 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 448 [2021-06-12 19:32:47,258 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 285 [2021-06-12 19:32:47,488 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 281 [2021-06-12 19:32:47,655 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 236 [2021-06-12 19:32:47,787 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 181 [2021-06-12 19:32:48,847 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 278 [2021-06-12 19:32:49,035 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 284 [2021-06-12 19:32:49,292 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 334 [2021-06-12 19:32:50,196 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 272 [2021-06-12 19:32:50,647 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 493 [2021-06-12 19:32:51,178 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 526 [2021-06-12 19:32:51,406 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 267 [2021-06-12 19:32:51,574 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 280 [2021-06-12 19:32:51,783 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 226 [2021-06-12 19:32:52,649 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 227 [2021-06-12 19:32:52,836 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 280 [2021-06-12 19:32:54,286 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 302 [2021-06-12 19:32:54,751 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 455 [2021-06-12 19:32:55,399 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 539 [2021-06-12 19:32:56,713 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 1029 DAG size of output: 839 [2021-06-12 19:32:56,855 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 247 [2021-06-12 19:32:56,988 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 248 [2021-06-12 19:32:58,341 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 277 [2021-06-12 19:32:58,520 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 286 [2021-06-12 19:32:58,828 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 404 [2021-06-12 19:32:59,731 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 242 [2021-06-12 19:33:01,014 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-06-12 19:33:01,267 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 331 [2021-06-12 19:33:01,740 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 435 [2021-06-12 19:33:02,539 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 642 [2021-06-12 19:33:03,534 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 701 [2021-06-12 19:33:05,783 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 1449 DAG size of output: 1159 [2021-06-12 19:33:05,909 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 276 [2021-06-12 19:33:06,130 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 282 [2021-06-12 19:33:06,301 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 237 [2021-06-12 19:33:06,843 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 174 [2021-06-12 19:33:07,830 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 235 [2021-06-12 19:33:08,037 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 336 [2021-06-12 19:33:08,285 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 386 [2021-06-12 19:33:08,654 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 432 [2021-06-12 19:33:09,127 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 457 [2021-06-12 19:33:09,687 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 493 [2021-06-12 19:33:09,916 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 245 [2021-06-12 19:33:11,597 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 282 [2021-06-12 19:33:11,811 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 290 [2021-06-12 19:33:12,143 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 384 [2021-06-12 19:33:12,617 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 459 [2021-06-12 19:33:13,200 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 485 [2021-06-12 19:33:14,421 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 963 DAG size of output: 759 [2021-06-12 19:33:15,655 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 235 [2021-06-12 19:33:15,799 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 267 [2021-06-12 19:33:16,023 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 342 [2021-06-12 19:33:16,302 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 364 [2021-06-12 19:33:16,995 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 256 [2021-06-12 19:33:17,449 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 309 [2021-06-12 19:33:18,272 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 247 [2021-06-12 19:33:18,440 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-06-12 19:33:18,787 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 460 [2021-06-12 19:33:19,211 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 471 [2021-06-12 19:33:19,744 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 517 [2021-06-12 19:33:20,794 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 881 DAG size of output: 770 [2021-06-12 19:33:22,153 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 976 DAG size of output: 843 [2021-06-12 19:33:24,492 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1269 [2021-06-12 19:33:29,456 WARN L205 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 2766 DAG size of output: 2078 [2021-06-12 19:33:35,185 WARN L205 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 2914 DAG size of output: 2167 [2021-06-12 19:33:41,849 WARN L205 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 3096 DAG size of output: 2337 [2021-06-12 19:33:49,599 WARN L205 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-12 19:33:57,416 WARN L205 SmtUtils]: Spent 7.80 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-12 19:34:06,133 WARN L205 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 3395 DAG size of output: 2575 [2021-06-12 19:34:06,441 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 2571 [2021-06-12 19:34:14,109 WARN L205 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 2573 DAG size of output: 2793 [2021-06-12 19:34:18,150 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 1761 DAG size of output: 2006 [2021-06-12 19:34:21,795 WARN L205 SmtUtils]: Spent 3.63 s on a formula simplification. DAG size of input: 1624 DAG size of output: 1786 [2021-06-12 19:34:21,908 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 1251 [2021-06-12 19:34:22,017 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 1123 [2021-06-12 19:34:22,212 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-06-12 19:34:22,996 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 266 [2021-06-12 19:34:23,544 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 228 [2021-06-12 19:34:24,381 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 510 [2021-06-12 19:34:25,081 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 813 [2021-06-12 19:34:25,992 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 1214 DAG size of output: 842 [2021-06-12 19:34:27,055 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1258 DAG size of output: 879 [2021-06-12 19:34:28,429 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 1418 DAG size of output: 990 [2021-06-12 19:34:29,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 683 [2021-06-12 19:34:29,877 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 240 [2021-06-12 19:34:30,533 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 209 [2021-06-12 19:34:31,136 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 210 [2021-06-12 19:34:31,417 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 365 [2021-06-12 19:34:31,792 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 480 [2021-06-12 19:34:32,312 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 500 [2021-06-12 19:34:32,892 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 538 [2021-06-12 19:34:33,513 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 1090 DAG size of output: 589 [2021-06-12 19:34:35,250 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 2240 DAG size of output: 1268 [2021-06-12 19:34:37,203 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 914 DAG size of output: 944 [2021-06-12 19:34:37,324 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 518 [2021-06-12 19:34:38,086 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 487 [2021-06-12 19:34:39,242 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 252 [2021-06-12 19:34:39,429 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 261 [2021-06-12 19:34:39,731 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 290 [2021-06-12 19:34:40,687 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 251 [2021-06-12 19:34:40,889 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 266 [2021-06-12 19:34:41,169 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 300 [2021-06-12 19:34:41,668 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 419 [2021-06-12 19:34:42,182 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 464 [2021-06-12 19:34:42,297 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 635 [2021-06-12 19:34:42,854 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 316 [2021-06-12 19:34:43,547 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 218 [2021-06-12 19:34:43,976 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 277 [2021-06-12 19:34:45,061 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 452 [2021-06-12 19:34:45,477 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 464 [2021-06-12 19:34:45,987 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 492 [2021-06-12 19:34:46,519 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 529 [2021-06-12 19:34:47,395 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 697 [2021-06-12 19:34:50,128 WARN L205 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 3118 DAG size of output: 1567 [2021-06-12 19:34:53,130 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1431 [2021-06-12 19:34:53,331 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1087 [2021-06-12 19:34:53,635 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 964 [2021-06-12 19:34:54,978 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 896 DAG size of output: 992 [2021-06-12 19:34:55,563 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 624 [2021-06-12 19:34:56,095 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2021-06-12 19:34:56,354 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 322 [2021-06-12 19:34:56,959 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 254 [2021-06-12 19:34:57,144 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 282 [2021-06-12 19:34:57,615 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 457 [2021-06-12 19:34:58,368 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 243 [2021-06-12 19:34:58,625 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 285 [2021-06-12 19:34:59,289 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 1004 DAG size of output: 531 [2021-06-12 19:35:00,376 WARN L205 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 1110 DAG size of output: 573 [2021-06-12 19:35:01,290 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 662 [2021-06-12 19:35:02,713 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 656 DAG size of output: 696 [2021-06-12 19:35:03,084 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 231 [2021-06-12 19:35:03,667 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 186 [2021-06-12 19:35:04,382 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 216 [2021-06-12 19:35:04,599 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 230 [2021-06-12 19:35:04,910 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 257 [2021-06-12 19:35:05,228 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 276 [2021-06-12 19:35:05,643 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 360 [2021-06-12 19:35:05,920 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 306 [2021-06-12 19:35:06,922 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 181 [2021-06-12 19:35:07,322 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 378 [2021-06-12 19:35:08,491 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 191 [2021-06-12 19:35:08,765 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 205 [2021-06-12 19:35:09,224 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 304 [2021-06-12 19:35:10,963 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1932 DAG size of output: 829 [2021-06-12 19:35:16,129 WARN L205 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-12 19:35:21,017 WARN L205 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-12 19:35:28,113 WARN L205 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 4827 DAG size of output: 2446 [2021-06-12 19:35:28,686 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 701 [2021-06-12 19:35:29,558 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 366 [2021-06-12 19:35:32,070 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1696 DAG size of output: 1306 [2021-06-12 19:35:32,549 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 847 [2021-06-12 19:35:33,492 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 437 [2021-06-12 19:35:33,753 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-06-12 19:35:34,578 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 527 [2021-06-12 19:35:35,570 WARN L205 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-12 19:35:36,554 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-12 19:35:37,607 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1790 DAG size of output: 775 [2021-06-12 19:35:38,421 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 780 [2021-06-12 19:35:38,534 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 634 [2021-06-12 19:35:39,661 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 281 [2021-06-12 19:35:39,838 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-12 19:35:40,029 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-12 19:35:40,260 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 249 [2021-06-12 19:35:40,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:40,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:40,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:40,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:35:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:40,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369532201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:40,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:40,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:35:40,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968036804] [2021-06-12 19:35:40,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:35:40,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:40,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:35:40,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:35:40,637 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:40,919 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-06-12 19:35:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:35:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:35:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:40,921 INFO L225 Difference]: With dead ends: 848 [2021-06-12 19:35:40,921 INFO L226 Difference]: Without dead ends: 845 [2021-06-12 19:35:40,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:35:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-06-12 19:35:40,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-06-12 19:35:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-06-12 19:35:40,933 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-06-12 19:35:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:40,933 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-06-12 19:35:40,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-06-12 19:35:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:35:40,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:40,935 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:41,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 19:35:41,149 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-06-12 19:35:41,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:41,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585742482] [2021-06-12 19:35:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:35:41,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585742482] [2021-06-12 19:35:41,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585742482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755889301] [2021-06-12 19:35:41,233 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:41,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:41,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:41,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:35:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:41,757 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:35:41,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:35:42,928 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 448 [2021-06-12 19:35:43,163 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 454 [2021-06-12 19:35:44,252 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 610 [2021-06-12 19:35:44,753 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 622 [2021-06-12 19:35:45,340 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-12 19:35:45,962 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-12 19:35:46,670 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 656 [2021-06-12 19:35:47,422 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 764 [2021-06-12 19:35:47,958 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 646 [2021-06-12 19:35:48,459 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 656 [2021-06-12 19:35:48,661 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 404 [2021-06-12 19:35:49,633 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 255 [2021-06-12 19:35:50,157 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 344 [2021-06-12 19:35:50,412 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 379 [2021-06-12 19:35:50,743 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 396 [2021-06-12 19:35:51,159 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-12 19:35:51,578 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-12 19:35:52,172 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 491 [2021-06-12 19:35:52,709 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 525 [2021-06-12 19:35:53,048 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 405 [2021-06-12 19:35:53,169 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 238 [2021-06-12 19:35:53,678 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 356 [2021-06-12 19:35:54,059 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 310 [2021-06-12 19:35:54,661 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 236 [2021-06-12 19:35:54,889 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 302 [2021-06-12 19:35:55,184 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 401 [2021-06-12 19:35:55,363 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-12 19:35:55,733 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 214 [2021-06-12 19:35:56,188 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 275 [2021-06-12 19:35:56,781 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 267 [2021-06-12 19:35:57,157 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-12 19:35:57,542 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-12 19:35:57,962 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 474 [2021-06-12 19:35:58,324 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 527 [2021-06-12 19:35:58,852 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 160 [2021-06-12 19:35:59,711 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 283 [2021-06-12 19:35:59,929 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-12 19:36:00,139 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-12 19:36:00,380 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 320 [2021-06-12 19:36:00,601 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 367 [2021-06-12 19:36:01,138 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 308 [2021-06-12 19:36:01,802 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-12 19:36:01,954 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-12 19:36:02,125 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 276 [2021-06-12 19:36:02,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:02,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:02,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:02,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:36:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755889301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:02,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:02,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:36:02,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822348566] [2021-06-12 19:36:02,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:36:02,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:36:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:02,442 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:02,703 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-06-12 19:36:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:36:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:36:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:02,705 INFO L225 Difference]: With dead ends: 961 [2021-06-12 19:36:02,705 INFO L226 Difference]: Without dead ends: 958 [2021-06-12 19:36:02,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-12 19:36:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-06-12 19:36:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-06-12 19:36:02,714 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-06-12 19:36:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:02,714 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-06-12 19:36:02,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-06-12 19:36:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:36:02,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:02,716 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:02,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5383 [2021-06-12 19:36:02,917 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:02,918 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-06-12 19:36:02,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:02,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286791787] [2021-06-12 19:36:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:02,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286791787] [2021-06-12 19:36:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286791787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475681815] [2021-06-12 19:36:02,989 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:03,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:36:03,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:36:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:03,391 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:36:03,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:03,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:36:04,153 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 247 [2021-06-12 19:36:04,291 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 267 [2021-06-12 19:36:04,464 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 281 [2021-06-12 19:36:05,131 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 241 [2021-06-12 19:36:05,283 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 256 [2021-06-12 19:36:05,645 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-12 19:36:05,986 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-12 19:36:06,388 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 420 [2021-06-12 19:36:06,993 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 522 [2021-06-12 19:36:07,298 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 274 [2021-06-12 19:36:07,538 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 312 [2021-06-12 19:36:07,667 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 237 [2021-06-12 19:36:08,371 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 260 [2021-06-12 19:36:09,563 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 268 [2021-06-12 19:36:09,841 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 420 [2021-06-12 19:36:10,190 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 416 [2021-06-12 19:36:11,371 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 452 [2021-06-12 19:36:11,914 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 504 [2021-06-12 19:36:12,168 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 318 [2021-06-12 19:36:13,215 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 251 [2021-06-12 19:36:13,405 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 286 [2021-06-12 19:36:14,342 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 315 [2021-06-12 19:36:15,169 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-12 19:36:15,996 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-12 19:36:17,126 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1080 DAG size of output: 713 [2021-06-12 19:36:17,694 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 636 [2021-06-12 19:36:18,156 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 563 [2021-06-12 19:36:18,323 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 282 [2021-06-12 19:36:18,456 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 271 [2021-06-12 19:36:18,921 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 257 [2021-06-12 19:36:19,135 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 334 [2021-06-12 19:36:19,696 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 325 [2021-06-12 19:36:19,866 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2021-06-12 19:36:20,028 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 271 [2021-06-12 19:36:20,910 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-12 19:36:21,167 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-12 19:36:21,506 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 365 [2021-06-12 19:36:21,864 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 284 [2021-06-12 19:36:22,024 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 218 [2021-06-12 19:36:22,630 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-12 19:36:22,748 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-12 19:36:22,882 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 250 [2021-06-12 19:36:23,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:23,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:23,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:23,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:36:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:23,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475681815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:23,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:23,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:36:23,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203584890] [2021-06-12 19:36:23,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:36:23,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:23,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:36:23,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:23,468 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:23,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:23,749 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-06-12 19:36:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:36:23,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:36:23,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:23,752 INFO L225 Difference]: With dead ends: 1077 [2021-06-12 19:36:23,752 INFO L226 Difference]: Without dead ends: 1074 [2021-06-12 19:36:23,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-12 19:36:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-06-12 19:36:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-06-12 19:36:23,762 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-06-12 19:36:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:23,762 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-06-12 19:36:23,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-06-12 19:36:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:36:23,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:23,764 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:23,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6461 [2021-06-12 19:36:23,965 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-06-12 19:36:23,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:23,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660154811] [2021-06-12 19:36:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660154811] [2021-06-12 19:36:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660154811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009285807] [2021-06-12 19:36:24,042 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:24,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:36:24,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:36:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:24,434 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:36:24,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:24,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:36:25,388 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 410 [2021-06-12 19:36:26,109 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 571 [2021-06-12 19:36:26,946 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 319 [2021-06-12 19:36:27,164 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 388 [2021-06-12 19:36:27,900 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 847 [2021-06-12 19:36:28,643 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 862 [2021-06-12 19:36:29,482 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-12 19:36:30,317 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-12 19:36:31,281 WARN L205 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 1136 DAG size of output: 887 [2021-06-12 19:36:32,018 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 883 DAG size of output: 931 [2021-06-12 19:36:32,428 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 419 [2021-06-12 19:36:32,996 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 498 [2021-06-12 19:36:33,992 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 242 [2021-06-12 19:36:34,147 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 264 [2021-06-12 19:36:34,427 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 439 [2021-06-12 19:36:34,834 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 525 [2021-06-12 19:36:35,364 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-12 19:36:35,914 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-12 19:36:36,607 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 633 [2021-06-12 19:36:37,098 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2021-06-12 19:36:37,403 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 529 [2021-06-12 19:36:37,867 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 311 [2021-06-12 19:36:38,423 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 300 [2021-06-12 19:36:38,596 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 325 [2021-06-12 19:36:38,828 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-12 19:36:39,053 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-12 19:36:39,307 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 381 [2021-06-12 19:36:39,483 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 298 [2021-06-12 19:36:40,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:40,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:40,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:40,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:36:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:40,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009285807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:40,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:40,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:36:40,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590889356] [2021-06-12 19:36:40,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:36:40,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:36:40,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:40,544 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:40,816 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-06-12 19:36:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:36:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:36:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:40,819 INFO L225 Difference]: With dead ends: 1209 [2021-06-12 19:36:40,819 INFO L226 Difference]: Without dead ends: 1206 [2021-06-12 19:36:40,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-12 19:36:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-06-12 19:36:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-06-12 19:36:40,835 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-06-12 19:36:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:40,836 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-06-12 19:36:40,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-06-12 19:36:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:36:40,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:40,837 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-06-12 19:36:41,060 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-06-12 19:36:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097742223] [2021-06-12 19:36:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:41,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:41,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097742223] [2021-06-12 19:36:41,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097742223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:41,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253128995] [2021-06-12 19:36:41,127 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:36:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:41,593 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:36:41,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:36:42,662 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 279 [2021-06-12 19:36:42,857 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 354 [2021-06-12 19:36:43,106 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 375 [2021-06-12 19:36:43,392 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 395 [2021-06-12 19:36:43,742 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-12 19:36:44,089 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-12 19:36:44,491 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 421 [2021-06-12 19:36:44,943 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 448 [2021-06-12 19:36:45,122 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 282 [2021-06-12 19:36:45,872 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 264 [2021-06-12 19:36:46,055 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 282 [2021-06-12 19:36:46,190 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 261 [2021-06-12 19:36:47,254 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 180 [2021-06-12 19:36:48,527 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 234 [2021-06-12 19:36:48,797 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 325 [2021-06-12 19:36:49,226 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-12 19:36:49,672 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-12 19:36:50,565 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 602 [2021-06-12 19:36:50,839 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 384 [2021-06-12 19:36:51,126 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 277 [2021-06-12 19:36:51,439 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 281 [2021-06-12 19:36:51,881 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 472 [2021-06-12 19:36:52,177 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 274 [2021-06-12 19:36:52,798 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 291 [2021-06-12 19:36:53,319 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-12 19:36:53,824 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-12 19:36:54,374 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 412 [2021-06-12 19:36:54,946 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 405 [2021-06-12 19:36:55,462 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 366 [2021-06-12 19:36:55,920 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 463 [2021-06-12 19:36:56,725 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 394 [2021-06-12 19:36:56,842 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 219 [2021-06-12 19:36:57,325 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 263 [2021-06-12 19:36:57,498 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 326 [2021-06-12 19:36:57,861 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 369 [2021-06-12 19:36:58,138 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-12 19:36:58,419 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-12 19:36:58,726 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 383 [2021-06-12 19:36:59,024 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 409 [2021-06-12 19:36:59,230 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 258 [2021-06-12 19:36:59,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:59,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:59,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:59,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:36:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:59,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253128995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:59,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:59,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:36:59,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258076984] [2021-06-12 19:36:59,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:36:59,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:36:59,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:59,572 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:59,839 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-06-12 19:36:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:36:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:36:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:59,842 INFO L225 Difference]: With dead ends: 1356 [2021-06-12 19:36:59,842 INFO L226 Difference]: Without dead ends: 1353 [2021-06-12 19:36:59,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-12 19:36:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-06-12 19:36:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-06-12 19:36:59,863 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-06-12 19:36:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:59,863 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-06-12 19:36:59,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-06-12 19:36:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:36:59,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:59,865 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:00,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8393 [2021-06-12 19:37:00,081 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-06-12 19:37:00,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:00,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506478327] [2021-06-12 19:37:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:37:00,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506478327] [2021-06-12 19:37:00,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506478327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797649967] [2021-06-12 19:37:00,162 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:00,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:00,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:37:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:00,546 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:37:00,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:00,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:37:01,177 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 291 [2021-06-12 19:37:01,328 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 312 [2021-06-12 19:37:01,500 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-06-12 19:37:02,160 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2021-06-12 19:37:02,306 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 292 [2021-06-12 19:37:02,656 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-12 19:37:03,003 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-12 19:37:03,417 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 505 [2021-06-12 19:37:04,128 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 616 [2021-06-12 19:37:04,466 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2021-06-12 19:37:04,929 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 328 [2021-06-12 19:37:05,165 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 349 [2021-06-12 19:37:05,345 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 276 [2021-06-12 19:37:06,271 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 302 [2021-06-12 19:37:06,406 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 240 [2021-06-12 19:37:07,117 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 263 [2021-06-12 19:37:07,272 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 293 [2021-06-12 19:37:07,499 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 360 [2021-06-12 19:37:07,892 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 478 [2021-06-12 19:37:08,066 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 293 [2021-06-12 19:37:08,183 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 225 [2021-06-12 19:37:08,863 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 280 [2021-06-12 19:37:09,047 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 334 [2021-06-12 19:37:09,205 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 243 [2021-06-12 19:37:09,969 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 280 [2021-06-12 19:37:10,309 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 442 [2021-06-12 19:37:11,062 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 1161 DAG size of output: 684 [2021-06-12 19:37:12,036 WARN L205 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 761 [2021-06-12 19:37:12,335 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 306 [2021-06-12 19:37:12,893 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 392 [2021-06-12 19:37:13,252 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 388 [2021-06-12 19:37:13,547 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 322 [2021-06-12 19:37:13,708 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 287 [2021-06-12 19:37:14,389 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 242 [2021-06-12 19:37:14,514 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 302 [2021-06-12 19:37:14,679 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 316 [2021-06-12 19:37:14,891 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 327 [2021-06-12 19:37:15,128 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 364 [2021-06-12 19:37:15,465 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 433 [2021-06-12 19:37:15,672 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-12 19:37:15,805 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 246 [2021-06-12 19:37:16,504 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 259 [2021-06-12 19:37:16,632 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 314 [2021-06-12 19:37:16,805 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 388 [2021-06-12 19:37:17,072 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 413 [2021-06-12 19:37:17,388 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 488 [2021-06-12 19:37:17,752 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 480 [2021-06-12 19:37:18,228 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 550 [2021-06-12 19:37:19,055 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 736 [2021-06-12 19:37:19,324 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 340 [2021-06-12 19:37:19,440 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 263 [2021-06-12 19:37:20,243 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 259 [2021-06-12 19:37:20,380 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-12 19:37:20,551 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 370 [2021-06-12 19:37:20,796 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 432 [2021-06-12 19:37:21,142 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 428 [2021-06-12 19:37:21,282 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 261 [2021-06-12 19:37:21,385 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 246 [2021-06-12 19:37:22,129 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 328 [2021-06-12 19:37:22,284 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 354 [2021-06-12 19:37:22,457 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 339 [2021-06-12 19:37:22,708 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 423 [2021-06-12 19:37:23,046 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 641 DAG size of output: 483 [2021-06-12 19:37:23,709 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 691 [2021-06-12 19:37:25,264 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 1870 DAG size of output: 1108 [2021-06-12 19:37:27,100 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 2044 DAG size of output: 1183 [2021-06-12 19:37:30,303 WARN L205 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 2890 DAG size of output: 1692 [2021-06-12 19:37:30,462 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 289 [2021-06-12 19:37:30,831 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 354 [2021-06-12 19:37:31,062 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 354 [2021-06-12 19:37:31,325 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 309 [2021-06-12 19:37:31,440 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 243 [2021-06-12 19:37:32,382 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-12 19:37:32,562 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-12 19:37:32,756 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 293 [2021-06-12 19:37:32,934 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 267 [2021-06-12 19:37:34,010 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 268 [2021-06-12 19:37:34,229 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-12 19:37:34,453 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-12 19:37:34,699 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2021-06-12 19:37:35,199 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 652 DAG size of output: 485 [2021-06-12 19:37:35,364 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 303 [2021-06-12 19:37:36,340 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 258 [2021-06-12 19:37:36,539 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-12 19:37:36,736 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-12 19:37:37,001 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 294 [2021-06-12 19:37:37,131 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 270 [2021-06-12 19:37:38,011 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-12 19:37:38,148 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-12 19:37:38,308 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 264 [2021-06-12 19:37:38,748 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 443 [2021-06-12 19:37:39,761 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 987 DAG size of output: 722 [2021-06-12 19:37:40,981 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1072 DAG size of output: 775 [2021-06-12 19:37:45,500 WARN L205 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-12 19:37:50,030 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-12 19:37:55,059 WARN L205 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 3718 DAG size of output: 2090 [2021-06-12 19:37:55,263 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 2086 [2021-06-12 19:38:00,187 WARN L205 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 2088 DAG size of output: 2316 [2021-06-12 19:38:00,368 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 1575 [2021-06-12 19:38:00,524 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 265 [2021-06-12 19:38:02,733 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 1537 DAG size of output: 1228 [2021-06-12 19:38:04,878 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1271 [2021-06-12 19:38:05,563 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 575 [2021-06-12 19:38:05,940 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 251 [2021-06-12 19:38:06,418 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 270 [2021-06-12 19:38:06,633 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-06-12 19:38:07,273 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 581 [2021-06-12 19:38:08,581 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 806 DAG size of output: 1066 [2021-06-12 19:38:08,892 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 317 [2021-06-12 19:38:09,338 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 223 [2021-06-12 19:38:10,438 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 578 [2021-06-12 19:38:11,202 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 694 [2021-06-12 19:38:12,629 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1077 [2021-06-12 19:38:15,773 WARN L205 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-12 19:38:18,920 WARN L205 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-12 19:38:22,323 WARN L205 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 2529 DAG size of output: 1364 [2021-06-12 19:38:23,321 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 273 [2021-06-12 19:38:24,383 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-12 19:38:25,245 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-12 19:38:26,181 WARN L205 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 860 [2021-06-12 19:38:26,701 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 608 [2021-06-12 19:38:26,876 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 478 [2021-06-12 19:38:27,537 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 274 [2021-06-12 19:38:27,647 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 278 [2021-06-12 19:38:27,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:27,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:27,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:38:27,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:38:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:27,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797649967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:27,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:27,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:38:27,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097037237] [2021-06-12 19:38:27,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:38:27,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:27,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:38:27,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:38:27,933 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:28,225 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-06-12 19:38:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:38:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:38:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:28,230 INFO L225 Difference]: With dead ends: 1521 [2021-06-12 19:38:28,230 INFO L226 Difference]: Without dead ends: 1518 [2021-06-12 19:38:28,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:38:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-12 19:38:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-06-12 19:38:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-06-12 19:38:28,253 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-06-12 19:38:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:28,253 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-06-12 19:38:28,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-06-12 19:38:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:38:28,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:28,255 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:28,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9235 [2021-06-12 19:38:28,473 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-06-12 19:38:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:28,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317556784] [2021-06-12 19:38:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:38:28,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:28,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317556784] [2021-06-12 19:38:28,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317556784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:28,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966545783] [2021-06-12 19:38:28,541 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:38:28,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:38:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:38:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:28,928 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:38:28,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:28,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:38:29,724 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 272 [2021-06-12 19:38:29,871 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 292 [2021-06-12 19:38:30,611 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 289 [2021-06-12 19:38:30,752 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 307 [2021-06-12 19:38:30,931 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 326 [2021-06-12 19:38:31,342 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 482 [2021-06-12 19:38:31,814 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-12 19:38:32,286 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-12 19:38:32,838 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 516 [2021-06-12 19:38:33,942 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 518 DAG size of output: 643 [2021-06-12 19:38:34,518 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 475 [2021-06-12 19:38:35,080 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 474 [2021-06-12 19:38:35,298 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-12 19:38:35,563 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-12 19:38:35,782 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 325 [2021-06-12 19:38:36,762 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-06-12 19:38:36,933 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 239 [2021-06-12 19:38:37,613 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 194 [2021-06-12 19:38:37,742 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 216 [2021-06-12 19:38:38,038 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 301 [2021-06-12 19:38:38,903 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 249 [2021-06-12 19:38:39,708 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 371 [2021-06-12 19:38:40,348 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 685 DAG size of output: 520 [2021-06-12 19:38:41,169 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 574 [2021-06-12 19:38:42,211 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 853 DAG size of output: 633 [2021-06-12 19:38:43,280 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 890 DAG size of output: 657 [2021-06-12 19:38:43,536 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 333 [2021-06-12 19:38:43,740 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 336 [2021-06-12 19:38:43,919 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 287 [2021-06-12 19:38:44,022 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 278 [2021-06-12 19:38:44,641 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 239 [2021-06-12 19:38:45,371 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 232 [2021-06-12 19:38:45,628 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 366 [2021-06-12 19:38:45,959 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 411 [2021-06-12 19:38:46,167 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 301 [2021-06-12 19:38:47,504 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 263 [2021-06-12 19:38:47,771 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 361 [2021-06-12 19:38:48,467 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 569 [2021-06-12 19:38:49,182 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 583 [2021-06-12 19:38:50,074 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 644 [2021-06-12 19:38:51,173 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 895 DAG size of output: 705 [2021-06-12 19:38:53,530 WARN L205 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 1440 DAG size of output: 1133 [2021-06-12 19:38:54,024 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 450 [2021-06-12 19:38:54,228 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 316 [2021-06-12 19:38:55,050 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 243 [2021-06-12 19:38:55,654 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 241 [2021-06-12 19:38:55,784 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 260 [2021-06-12 19:38:56,052 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 341 [2021-06-12 19:38:56,383 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 367 [2021-06-12 19:38:56,788 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 395 [2021-06-12 19:38:57,284 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 417 [2021-06-12 19:38:58,220 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 296 [2021-06-12 19:38:58,882 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 410 [2021-06-12 19:38:59,205 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 438 [2021-06-12 19:38:59,598 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 471 [2021-06-12 19:39:00,543 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 665 [2021-06-12 19:39:01,538 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 992 DAG size of output: 678 [2021-06-12 19:39:01,822 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 347 [2021-06-12 19:39:02,050 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 331 [2021-06-12 19:39:02,222 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 324 [2021-06-12 19:39:02,968 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 230 [2021-06-12 19:39:03,114 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 251 [2021-06-12 19:39:03,300 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 271 [2021-06-12 19:39:04,002 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 241 [2021-06-12 19:39:04,162 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 271 [2021-06-12 19:39:04,543 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 418 [2021-06-12 19:39:04,768 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 310 [2021-06-12 19:39:05,825 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2021-06-12 19:39:06,538 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 365 [2021-06-12 19:39:07,287 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 549 [2021-06-12 19:39:08,191 WARN L205 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 815 DAG size of output: 620 [2021-06-12 19:39:09,103 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 634 [2021-06-12 19:39:10,240 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 938 DAG size of output: 703 [2021-06-12 19:39:12,478 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 1564 DAG size of output: 1152 [2021-06-12 19:39:15,227 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1295 [2021-06-12 19:39:20,944 WARN L205 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 2788 DAG size of output: 2064 [2021-06-12 19:39:26,944 WARN L205 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 2928 DAG size of output: 2124 [2021-06-12 19:39:34,548 WARN L205 SmtUtils]: Spent 7.59 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-12 19:39:42,113 WARN L205 SmtUtils]: Spent 7.55 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-12 19:39:50,473 WARN L205 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 3174 DAG size of output: 2225 [2021-06-12 19:39:51,282 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 2225 DAG size of output: 2208 [2021-06-12 19:40:04,728 WARN L205 SmtUtils]: Spent 13.43 s on a formula simplification. DAG size of input: 2137 DAG size of output: 2835 [2021-06-12 19:40:07,776 WARN L205 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1188 [2021-06-12 19:40:10,045 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 838 DAG size of output: 931 [2021-06-12 19:40:10,349 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 318 [2021-06-12 19:40:10,566 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 383 [2021-06-12 19:40:10,699 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 214 [2021-06-12 19:40:11,229 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 273 [2021-06-12 19:40:11,758 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 328 [2021-06-12 19:40:12,549 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 535 [2021-06-12 19:40:14,345 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 601 DAG size of output: 858 [2021-06-12 19:40:14,874 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 436 [2021-06-12 19:40:15,227 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 321 [2021-06-12 19:40:15,882 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 248 [2021-06-12 19:40:16,075 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 256 [2021-06-12 19:40:16,677 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 510 [2021-06-12 19:40:17,849 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1520 DAG size of output: 716 [2021-06-12 19:40:20,288 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1982 DAG size of output: 1850 [2021-06-12 19:40:24,241 WARN L205 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 1065 DAG size of output: 1160 [2021-06-12 19:40:25,812 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 616 DAG size of output: 881 [2021-06-12 19:40:27,302 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 605 DAG size of output: 873 [2021-06-12 19:40:27,518 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 559 [2021-06-12 19:40:27,927 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 360 [2021-06-12 19:40:28,070 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 245 [2021-06-12 19:40:28,700 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 252 [2021-06-12 19:40:28,892 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 316 [2021-06-12 19:40:29,376 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 487 [2021-06-12 19:40:30,436 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1169 DAG size of output: 828 [2021-06-12 19:40:31,416 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 592 [2021-06-12 19:40:31,978 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 343 [2021-06-12 19:40:32,151 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 364 [2021-06-12 19:40:32,447 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 367 [2021-06-12 19:40:33,052 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 269 [2021-06-12 19:40:33,309 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 405 [2021-06-12 19:40:33,690 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 463 [2021-06-12 19:40:34,507 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 630 [2021-06-12 19:40:36,636 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 1986 DAG size of output: 1308 [2021-06-12 19:40:40,043 WARN L205 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 2724 DAG size of output: 1643 [2021-06-12 19:40:44,235 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 3974 DAG size of output: 1745 [2021-06-12 19:40:48,844 WARN L205 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-12 19:40:53,380 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-12 19:40:58,123 WARN L205 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 4048 DAG size of output: 1786 [2021-06-12 19:41:00,499 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 1788 DAG size of output: 1154 [2021-06-12 19:41:00,694 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 861 DAG size of output: 861 [2021-06-12 19:41:02,015 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 858 DAG size of output: 808 [2021-06-12 19:41:02,177 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2021-06-12 19:41:02,640 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 275 [2021-06-12 19:41:03,209 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 344 [2021-06-12 19:41:03,576 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 437 [2021-06-12 19:41:04,016 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 440 [2021-06-12 19:41:04,450 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 372 [2021-06-12 19:41:04,635 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 254 [2021-06-12 19:41:04,771 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 125 [2021-06-12 19:41:04,876 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 136 [2021-06-12 19:41:05,053 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 235 [2021-06-12 19:41:05,717 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-12 19:41:06,378 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-12 19:41:07,103 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 594 [2021-06-12 19:41:07,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-12 19:41:07,853 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-12 19:41:07,976 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 235 [2021-06-12 19:41:08,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:08,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:08,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:41:08,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:41:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:08,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966545783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:08,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:08,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:41:08,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612893860] [2021-06-12 19:41:08,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:08,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:08,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:08,165 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:08,382 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-06-12 19:41:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:41:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:41:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:08,385 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 19:41:08,385 INFO L226 Difference]: Without dead ends: 1647 [2021-06-12 19:41:08,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-12 19:41:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-06-12 19:41:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-06-12 19:41:08,405 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-06-12 19:41:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:08,405 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-06-12 19:41:08,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-06-12 19:41:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:41:08,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:08,408 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:08,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11252,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:08,625 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-06-12 19:41:08,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:08,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577113886] [2021-06-12 19:41:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:41:08,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577113886] [2021-06-12 19:41:08,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577113886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608971672] [2021-06-12 19:41:08,706 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:08,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:41:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:08,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:41:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:09,078 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:41:09,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:09,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:41:09,842 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 278 [2021-06-12 19:41:10,001 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2021-06-12 19:41:10,181 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-12 19:41:10,361 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-12 19:41:10,587 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 318 [2021-06-12 19:41:10,968 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 388 [2021-06-12 19:41:11,435 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 416 [2021-06-12 19:41:11,670 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 323 [2021-06-12 19:41:11,887 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 340 [2021-06-12 19:41:12,049 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-12 19:41:12,595 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 318 [2021-06-12 19:41:12,833 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 273 [2021-06-12 19:41:13,500 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 243 [2021-06-12 19:41:14,181 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 350 [2021-06-12 19:41:14,403 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 364 [2021-06-12 19:41:14,761 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 457 [2021-06-12 19:41:15,210 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 501 [2021-06-12 19:41:15,818 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 609 [2021-06-12 19:41:15,980 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 251 [2021-06-12 19:41:16,323 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 295 [2021-06-12 19:41:16,561 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 266 [2021-06-12 19:41:17,395 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 221 [2021-06-12 19:41:17,569 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 263 [2021-06-12 19:41:17,857 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 324 [2021-06-12 19:41:18,216 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 362 [2021-06-12 19:41:19,158 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 1218 DAG size of output: 764 [2021-06-12 19:41:20,413 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 1311 DAG size of output: 833 [2021-06-12 19:41:21,979 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1466 DAG size of output: 958 [2021-06-12 19:41:22,459 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 383 [2021-06-12 19:41:22,699 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-12 19:41:22,859 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 253 [2021-06-12 19:41:23,116 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 297 [2021-06-12 19:41:24,069 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 279 [2021-06-12 19:41:24,432 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 347 [2021-06-12 19:41:24,889 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 376 [2021-06-12 19:41:25,173 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 249 [2021-06-12 19:41:25,345 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 195 [2021-06-12 19:41:25,950 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 256 [2021-06-12 19:41:26,637 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 234 [2021-06-12 19:41:26,911 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 380 [2021-06-12 19:41:27,386 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 461 [2021-06-12 19:41:27,981 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 492 [2021-06-12 19:41:29,106 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1016 DAG size of output: 713 [2021-06-12 19:41:30,522 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1150 DAG size of output: 764 [2021-06-12 19:41:33,762 WARN L205 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-12 19:41:37,010 WARN L205 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-12 19:41:40,565 WARN L205 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 2266 DAG size of output: 1444 [2021-06-12 19:41:40,705 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 1444 [2021-06-12 19:41:40,903 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 249 [2021-06-12 19:41:41,747 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 220 [2021-06-12 19:41:42,840 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 820 DAG size of output: 704 [2021-06-12 19:41:43,127 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 322 [2021-06-12 19:41:43,767 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-12 19:41:43,877 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-12 19:41:44,273 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 508 [2021-06-12 19:41:44,573 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 568 [2021-06-12 19:41:45,713 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 581 [2021-06-12 19:41:46,538 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2021-06-12 19:41:47,110 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 250 [2021-06-12 19:41:47,270 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 276 [2021-06-12 19:41:47,483 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 296 [2021-06-12 19:41:47,743 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-12 19:41:47,995 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-12 19:41:48,342 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 377 [2021-06-12 19:41:48,826 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 518 [2021-06-12 19:41:49,634 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 773 DAG size of output: 772 [2021-06-12 19:41:49,787 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 769 DAG size of output: 756 [2021-06-12 19:41:50,531 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 525 [2021-06-12 19:41:50,993 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 349 [2021-06-12 19:41:51,643 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 225 [2021-06-12 19:41:52,190 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 229 [2021-06-12 19:41:52,352 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 270 [2021-06-12 19:41:52,596 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 310 [2021-06-12 19:41:52,787 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 311 [2021-06-12 19:41:53,503 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-12 19:41:54,228 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-12 19:41:55,017 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 674 [2021-06-12 19:41:55,792 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 701 [2021-06-12 19:41:55,985 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-06-12 19:41:56,669 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 450 [2021-06-12 19:41:56,774 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 206 [2021-06-12 19:41:57,048 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 211 [2021-06-12 19:41:57,428 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 336 [2021-06-12 19:41:57,681 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-12 19:41:57,927 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-12 19:41:58,206 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 383 [2021-06-12 19:41:58,526 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 474 [2021-06-12 19:41:58,810 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 426 [2021-06-12 19:41:59,254 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 284 [2021-06-12 19:41:59,559 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-12 19:41:59,675 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-12 19:41:59,805 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 236 [2021-06-12 19:42:00,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:00,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:00,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:00,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:42:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:00,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608971672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:00,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:00,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:42:00,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853728647] [2021-06-12 19:42:00,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:00,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:00,083 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:00,311 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-06-12 19:42:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:42:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:42:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:00,315 INFO L225 Difference]: With dead ends: 1787 [2021-06-12 19:42:00,315 INFO L226 Difference]: Without dead ends: 1784 [2021-06-12 19:42:00,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-12 19:42:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-06-12 19:42:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-06-12 19:42:00,345 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-06-12 19:42:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:00,345 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-06-12 19:42:00,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-06-12 19:42:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:42:00,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:00,348 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:00,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15100 [2021-06-12 19:42:00,572 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:00,572 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-06-12 19:42:00,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:00,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783759765] [2021-06-12 19:42:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:00,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:00,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783759765] [2021-06-12 19:42:00,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783759765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:00,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216290169] [2021-06-12 19:42:00,647 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:00,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:42:00,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:00,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:42:00,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:01,049 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:42:01,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:42:01,753 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 300 [2021-06-12 19:42:01,903 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 316 [2021-06-12 19:42:02,087 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-12 19:42:02,283 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-12 19:42:02,503 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 355 [2021-06-12 19:42:02,836 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 449 [2021-06-12 19:42:03,416 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 482 [2021-06-12 19:42:03,603 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 310 [2021-06-12 19:42:03,724 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 289 [2021-06-12 19:42:03,893 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 239 [2021-06-12 19:42:04,733 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 239 [2021-06-12 19:42:04,920 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 257 [2021-06-12 19:42:05,813 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 242 [2021-06-12 19:42:06,058 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 318 [2021-06-12 19:42:06,937 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 210 [2021-06-12 19:42:07,075 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 245 [2021-06-12 19:42:08,009 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 208 [2021-06-12 19:42:08,169 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 245 [2021-06-12 19:42:08,495 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 335 [2021-06-12 19:42:09,174 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 534 [2021-06-12 19:42:10,090 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 1151 DAG size of output: 739 [2021-06-12 19:42:11,212 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-12 19:42:12,345 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-12 19:42:13,590 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1333 DAG size of output: 861 [2021-06-12 19:42:16,423 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 863 DAG size of output: 853 [2021-06-12 19:42:18,163 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 840 DAG size of output: 1003 [2021-06-12 19:42:18,441 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 434 [2021-06-12 19:42:18,564 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 194 [2021-06-12 19:42:20,401 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 198 [2021-06-12 19:42:20,704 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 299 [2021-06-12 19:42:21,261 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 370 [2021-06-12 19:42:21,765 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 457 [2021-06-12 19:42:22,758 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 1159 DAG size of output: 615 [2021-06-12 19:42:24,297 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-12 19:42:25,392 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-12 19:42:26,547 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1362 DAG size of output: 707 [2021-06-12 19:42:27,226 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 792 [2021-06-12 19:42:27,709 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 483 [2021-06-12 19:42:28,067 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 383 [2021-06-12 19:42:28,489 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 258 [2021-06-12 19:42:28,637 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-12 19:42:28,795 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-12 19:42:28,952 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 334 [2021-06-12 19:42:29,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:29,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:29,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:29,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:42:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:29,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216290169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:29,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:29,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:42:29,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021024121] [2021-06-12 19:42:29,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:29,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:29,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:29,952 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:30,272 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-06-12 19:42:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:42:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:42:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:30,275 INFO L225 Difference]: With dead ends: 1931 [2021-06-12 19:42:30,275 INFO L226 Difference]: Without dead ends: 1928 [2021-06-12 19:42:30,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-12 19:42:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-06-12 19:42:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-06-12 19:42:30,297 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-06-12 19:42:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:30,297 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-06-12 19:42:30,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-06-12 19:42:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:42:30,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:30,300 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:30,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16805,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:30,513 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-06-12 19:42:30,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:30,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5059829] [2021-06-12 19:42:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:30,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:30,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5059829] [2021-06-12 19:42:30,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5059829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:30,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499411146] [2021-06-12 19:42:30,581 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:30,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:42:30,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:42:30,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:30,973 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:42:30,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:30,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:42:31,525 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 308 [2021-06-12 19:42:31,665 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 319 [2021-06-12 19:42:32,302 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 419 [2021-06-12 19:42:33,067 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 301 [2021-06-12 19:42:33,496 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-12 19:42:33,938 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-12 19:42:34,480 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-06-12 19:42:35,051 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 700 [2021-06-12 19:42:35,194 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 621 [2021-06-12 19:42:35,303 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 257 [2021-06-12 19:42:36,259 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 333 [2021-06-12 19:42:37,883 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 273 [2021-06-12 19:42:38,100 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 332 [2021-06-12 19:42:38,362 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 365 [2021-06-12 19:42:38,784 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 459 [2021-06-12 19:42:39,306 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-12 19:42:39,831 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-12 19:42:40,555 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 554 [2021-06-12 19:42:41,078 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 548 [2021-06-12 19:42:41,257 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 514 [2021-06-12 19:42:41,389 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 449 [2021-06-12 19:42:42,175 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 263 [2021-06-12 19:42:42,556 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 214 [2021-06-12 19:42:42,702 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-12 19:42:42,853 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-12 19:42:43,021 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 260 [2021-06-12 19:42:43,169 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 265 [2021-06-12 19:42:43,378 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 209 [2021-06-12 19:42:44,110 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 222 [2021-06-12 19:42:45,063 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-12 19:42:45,230 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-12 19:42:45,421 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 332 [2021-06-12 19:42:45,622 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 353 [2021-06-12 19:42:46,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:46,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:46,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:46,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:42:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:46,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499411146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:46,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:46,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:42:46,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41800297] [2021-06-12 19:42:46,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:46,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:46,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:46,227 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:46,510 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-06-12 19:42:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:42:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:42:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:46,513 INFO L225 Difference]: With dead ends: 2066 [2021-06-12 19:42:46,514 INFO L226 Difference]: Without dead ends: 2063 [2021-06-12 19:42:46,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-12 19:42:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-06-12 19:42:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-06-12 19:42:46,535 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-06-12 19:42:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:46,535 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-06-12 19:42:46,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-06-12 19:42:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:42:46,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:46,537 INFO L472 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:46,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18613,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:46,738 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-06-12 19:42:46,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:46,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746793245] [2021-06-12 19:42:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:46,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:46,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746793245] [2021-06-12 19:42:46,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746793245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:46,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712003166] [2021-06-12 19:42:46,808 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:46,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:42:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:47,201 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-12 19:42:47,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:47,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-12 19:42:48,132 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-12 19:42:48,293 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-12 19:42:48,490 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 300 [2021-06-12 19:42:48,630 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 247 [2021-06-12 19:42:49,461 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 177 [2021-06-12 19:42:49,608 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 212 [2021-06-12 19:42:49,802 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 274 [2021-06-12 19:42:49,967 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 257 [2021-06-12 19:42:50,074 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 236 [2021-06-12 19:42:51,157 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 240 [2021-06-12 19:42:51,357 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 306 [2021-06-12 19:42:51,648 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 360 [2021-06-12 19:42:52,046 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 389 [2021-06-12 19:42:52,218 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 259 [2021-06-12 19:42:53,199 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 203 [2021-06-12 19:42:53,374 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 222 [2021-06-12 19:42:53,587 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 291 [2021-06-12 19:42:53,844 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 320 [2021-06-12 19:42:54,503 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 499 [2021-06-12 19:42:55,351 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 607 [2021-06-12 19:42:56,321 WARN L205 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 1105 DAG size of output: 633 [2021-06-12 19:42:56,602 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 239 [2021-06-12 19:42:56,708 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 223 [2021-06-12 19:42:57,857 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-06-12 19:42:58,043 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-12 19:42:58,338 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 273 [2021-06-12 19:42:58,654 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 333 [2021-06-12 19:42:59,039 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 367 [2021-06-12 19:42:59,148 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 233 [2021-06-12 19:43:00,384 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 191 [2021-06-12 19:43:00,546 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 236 [2021-06-12 19:43:00,793 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 275 [2021-06-12 19:43:01,135 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 297 [2021-06-12 19:43:01,544 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 336 [2021-06-12 19:43:02,398 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 520 [2021-06-12 19:43:03,729 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 867 DAG size of output: 562 [2021-06-12 19:43:04,793 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 898 DAG size of output: 565 [2021-06-12 19:43:07,071 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-12 19:43:09,367 WARN L205 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-12 19:43:11,864 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 1772 DAG size of output: 1016 [2021-06-12 19:43:14,576 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 1018 DAG size of output: 1191 [2021-06-12 19:43:14,886 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 698 [2021-06-12 19:43:15,483 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 575 [2021-06-12 19:43:15,734 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 518 [2021-06-12 19:43:16,677 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 241 [2021-06-12 19:43:16,846 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 268 [2021-06-12 19:43:17,113 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-12 19:43:17,370 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-12 19:43:17,608 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 334 [2021-06-12 19:43:18,472 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 336 [2021-06-12 19:43:19,291 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-12 19:43:19,403 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-12 19:43:19,528 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 252 [2021-06-12 19:43:19,642 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-06-12 19:43:20,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:20,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:20,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:20,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-12 19:43:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:20,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712003166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:20,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:20,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 19:43:20,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998123957] [2021-06-12 19:43:20,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:43:20,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:20,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:43:20,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:43:20,489 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:20,811 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-06-12 19:43:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:43:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:43:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:20,814 INFO L225 Difference]: With dead ends: 2152 [2021-06-12 19:43:20,814 INFO L226 Difference]: Without dead ends: 2149 [2021-06-12 19:43:20,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:43:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-12 19:43:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-06-12 19:43:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-06-12 19:43:20,848 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-06-12 19:43:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:20,848 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-06-12 19:43:20,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-06-12 19:43:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:20,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:20,851 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:21,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19836,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:21,074 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-06-12 19:43:21,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:21,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760168555] [2021-06-12 19:43:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:21,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760168555] [2021-06-12 19:43:21,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760168555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383792671] [2021-06-12 19:43:21,166 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:21,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:21,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383792671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:21,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:21,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:43:21,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147166589] [2021-06-12 19:43:21,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:43:21,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:43:21,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:43:21,246 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:21,404 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-06-12 19:43:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:21,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:21,407 INFO L225 Difference]: With dead ends: 2169 [2021-06-12 19:43:21,407 INFO L226 Difference]: Without dead ends: 2169 [2021-06-12 19:43:21,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:43:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-12 19:43:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-06-12 19:43:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-06-12 19:43:21,442 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-06-12 19:43:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:21,442 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-06-12 19:43:21,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-06-12 19:43:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:21,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:21,445 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:21,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21446 [2021-06-12 19:43:21,661 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-06-12 19:43:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:21,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014662056] [2021-06-12 19:43:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:21,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014662056] [2021-06-12 19:43:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014662056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116660221] [2021-06-12 19:43:21,765 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:21,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:21,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:21,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116660221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:21,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:21,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:43:21,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656619267] [2021-06-12 19:43:21,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:43:21,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:43:21,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:43:21,829 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:22,113 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-06-12 19:43:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:43:22,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:22,122 INFO L225 Difference]: With dead ends: 2262 [2021-06-12 19:43:22,123 INFO L226 Difference]: Without dead ends: 2255 [2021-06-12 19:43:22,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:43:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-12 19:43:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-06-12 19:43:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-06-12 19:43:22,145 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-06-12 19:43:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:22,145 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-06-12 19:43:22,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-06-12 19:43:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:22,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:22,148 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:22,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21447 [2021-06-12 19:43:22,349 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-06-12 19:43:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:22,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632280679] [2021-06-12 19:43:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:22,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:22,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632280679] [2021-06-12 19:43:22,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632280679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:22,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141395940] [2021-06-12 19:43:22,446 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:22,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:22,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141395940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:22,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:22,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:22,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196416824] [2021-06-12 19:43:22,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:22,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:22,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:22,510 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:22,646 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-06-12 19:43:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:22,650 INFO L225 Difference]: With dead ends: 2016 [2021-06-12 19:43:22,650 INFO L226 Difference]: Without dead ends: 2015 [2021-06-12 19:43:22,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-06-12 19:43:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-06-12 19:43:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-06-12 19:43:22,684 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-06-12 19:43:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:22,684 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-06-12 19:43:22,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-06-12 19:43:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:22,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:22,687 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:22,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21448,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:22,890 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-06-12 19:43:22,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:22,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866598572] [2021-06-12 19:43:22,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:22,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:22,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866598572] [2021-06-12 19:43:22,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866598572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:22,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994339435] [2021-06-12 19:43:22,970 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:23,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:43:23,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:23,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:23,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:23,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994339435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:23,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:23,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:23,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711095874] [2021-06-12 19:43:23,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:23,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:23,040 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:23,110 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-06-12 19:43:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:23,114 INFO L225 Difference]: With dead ends: 2320 [2021-06-12 19:43:23,114 INFO L226 Difference]: Without dead ends: 2320 [2021-06-12 19:43:23,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-12 19:43:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-06-12 19:43:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-06-12 19:43:23,147 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-06-12 19:43:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:23,147 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-06-12 19:43:23,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-06-12 19:43:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:23,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:23,151 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:23,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21449 [2021-06-12 19:43:23,370 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-06-12 19:43:23,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:23,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259625428] [2021-06-12 19:43:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:23,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:23,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259625428] [2021-06-12 19:43:23,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259625428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:23,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887713950] [2021-06-12 19:43:23,437 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:23,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887713950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:23,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:23,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:23,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046240688] [2021-06-12 19:43:23,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:23,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:23,502 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:23,620 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-06-12 19:43:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:43:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:23,623 INFO L225 Difference]: With dead ends: 2210 [2021-06-12 19:43:23,623 INFO L226 Difference]: Without dead ends: 2210 [2021-06-12 19:43:23,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-12 19:43:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-06-12 19:43:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-06-12 19:43:23,644 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-06-12 19:43:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:23,645 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-06-12 19:43:23,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-06-12 19:43:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:23,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:23,647 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:23,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:23,847 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-06-12 19:43:23,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:23,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359590174] [2021-06-12 19:43:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:23,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:23,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359590174] [2021-06-12 19:43:23,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359590174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:23,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653776353] [2021-06-12 19:43:23,918 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:23,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:23,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653776353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:23,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:23,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18129750] [2021-06-12 19:43:23,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:23,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:23,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:23,997 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:24,188 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-06-12 19:43:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:24,192 INFO L225 Difference]: With dead ends: 2207 [2021-06-12 19:43:24,192 INFO L226 Difference]: Without dead ends: 2205 [2021-06-12 19:43:24,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-12 19:43:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-06-12 19:43:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-06-12 19:43:24,223 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-06-12 19:43:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:24,223 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-06-12 19:43:24,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-06-12 19:43:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:24,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:24,226 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:24,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21451 [2021-06-12 19:43:24,449 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-06-12 19:43:24,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:24,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096337323] [2021-06-12 19:43:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:24,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:24,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096337323] [2021-06-12 19:43:24,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096337323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904142969] [2021-06-12 19:43:24,525 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:24,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:24,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:24,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:24,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904142969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:24,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:24,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:24,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80686417] [2021-06-12 19:43:24,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:24,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:24,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:24,579 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:24,728 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-06-12 19:43:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:24,731 INFO L225 Difference]: With dead ends: 2091 [2021-06-12 19:43:24,731 INFO L226 Difference]: Without dead ends: 2089 [2021-06-12 19:43:24,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-12 19:43:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-06-12 19:43:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-06-12 19:43:24,750 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-06-12 19:43:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-06-12 19:43:24,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-06-12 19:43:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:24,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:24,753 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:24,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21452 [2021-06-12 19:43:24,953 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-06-12 19:43:24,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:24,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259059686] [2021-06-12 19:43:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:25,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259059686] [2021-06-12 19:43:25,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259059686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329448423] [2021-06-12 19:43:25,027 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:25,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:25,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:25,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:25,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329448423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:25,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:25,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:25,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943129056] [2021-06-12 19:43:25,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:25,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:25,125 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:25,200 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-06-12 19:43:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:25,204 INFO L225 Difference]: With dead ends: 2273 [2021-06-12 19:43:25,204 INFO L226 Difference]: Without dead ends: 2273 [2021-06-12 19:43:25,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-06-12 19:43:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-06-12 19:43:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-06-12 19:43:25,235 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-06-12 19:43:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:25,235 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-06-12 19:43:25,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-06-12 19:43:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:25,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:25,238 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:25,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:25,457 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-06-12 19:43:25,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:25,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301290482] [2021-06-12 19:43:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:25,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:25,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301290482] [2021-06-12 19:43:25,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301290482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:25,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053893897] [2021-06-12 19:43:25,530 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:25,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:25,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:25,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:25,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053893897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:25,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:25,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:25,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780145838] [2021-06-12 19:43:25,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:25,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:25,589 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:25,759 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-06-12 19:43:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:25,762 INFO L225 Difference]: With dead ends: 2019 [2021-06-12 19:43:25,762 INFO L226 Difference]: Without dead ends: 2017 [2021-06-12 19:43:25,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-06-12 19:43:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-06-12 19:43:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-06-12 19:43:25,781 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-06-12 19:43:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:25,782 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-06-12 19:43:25,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-06-12 19:43:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:25,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:25,784 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:25,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21454,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:25,984 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-06-12 19:43:25,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:25,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115397808] [2021-06-12 19:43:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:26,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115397808] [2021-06-12 19:43:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115397808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:26,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552300243] [2021-06-12 19:43:26,067 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:26,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:43:26,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:26,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552300243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:26,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:26,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:26,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212719271] [2021-06-12 19:43:26,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:26,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:26,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:26,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:26,152 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:26,242 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-06-12 19:43:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:26,246 INFO L225 Difference]: With dead ends: 2414 [2021-06-12 19:43:26,246 INFO L226 Difference]: Without dead ends: 2414 [2021-06-12 19:43:26,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-12 19:43:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-06-12 19:43:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-06-12 19:43:26,279 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-06-12 19:43:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:26,279 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-06-12 19:43:26,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-06-12 19:43:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:26,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:26,282 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:26,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21455 [2021-06-12 19:43:26,495 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-06-12 19:43:26,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:26,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111266372] [2021-06-12 19:43:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:26,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111266372] [2021-06-12 19:43:26,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111266372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134477011] [2021-06-12 19:43:26,573 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:26,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:26,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:26,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:26,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:26,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134477011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:26,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:26,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:26,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938334953] [2021-06-12 19:43:26,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:26,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:26,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:26,658 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:26,805 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-06-12 19:43:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:26,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:26,808 INFO L225 Difference]: With dead ends: 2122 [2021-06-12 19:43:26,809 INFO L226 Difference]: Without dead ends: 2122 [2021-06-12 19:43:26,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:43:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-12 19:43:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-06-12 19:43:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-06-12 19:43:26,836 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-06-12 19:43:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:26,837 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-06-12 19:43:26,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-06-12 19:43:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:26,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:26,840 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:27,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21456 [2021-06-12 19:43:27,061 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-06-12 19:43:27,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:27,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989032821] [2021-06-12 19:43:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:27,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989032821] [2021-06-12 19:43:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989032821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462575971] [2021-06-12 19:43:27,123 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462575971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:27,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:27,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589788421] [2021-06-12 19:43:27,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:27,179 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:27,328 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-06-12 19:43:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:27,330 INFO L225 Difference]: With dead ends: 2095 [2021-06-12 19:43:27,330 INFO L226 Difference]: Without dead ends: 2093 [2021-06-12 19:43:27,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-06-12 19:43:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-06-12 19:43:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-06-12 19:43:27,351 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-06-12 19:43:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:27,351 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-06-12 19:43:27,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-06-12 19:43:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:27,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:27,353 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:27,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21457 [2021-06-12 19:43:27,554 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-06-12 19:43:27,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:27,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494877766] [2021-06-12 19:43:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:27,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:27,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494877766] [2021-06-12 19:43:27,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494877766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:27,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138741472] [2021-06-12 19:43:27,618 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:27,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:27,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:27,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138741472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:27,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:27,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:27,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609064506] [2021-06-12 19:43:27,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:27,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:27,675 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:27,830 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-06-12 19:43:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:27,832 INFO L225 Difference]: With dead ends: 1994 [2021-06-12 19:43:27,832 INFO L226 Difference]: Without dead ends: 1992 [2021-06-12 19:43:27,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-12 19:43:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-06-12 19:43:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-06-12 19:43:27,852 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-06-12 19:43:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:27,852 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-06-12 19:43:27,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-06-12 19:43:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:27,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:27,855 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:28,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-06-12 19:43:28,055 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-06-12 19:43:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:28,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577077495] [2021-06-12 19:43:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:28,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577077495] [2021-06-12 19:43:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577077495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:28,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846859774] [2021-06-12 19:43:28,121 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:28,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:28,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846859774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:28,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:28,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:28,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681487960] [2021-06-12 19:43:28,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:28,213 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:28,284 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-06-12 19:43:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:28,287 INFO L225 Difference]: With dead ends: 2201 [2021-06-12 19:43:28,287 INFO L226 Difference]: Without dead ends: 2201 [2021-06-12 19:43:28,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-12 19:43:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-06-12 19:43:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-06-12 19:43:28,316 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-06-12 19:43:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:28,316 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-06-12 19:43:28,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-06-12 19:43:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:28,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:28,319 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:28,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21459,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:28,538 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:28,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:28,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-06-12 19:43:28,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:28,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381525423] [2021-06-12 19:43:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:28,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:28,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381525423] [2021-06-12 19:43:28,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381525423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:28,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231145208] [2021-06-12 19:43:28,618 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:28,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:28,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:28,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231145208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:28,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:28,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:28,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619892554] [2021-06-12 19:43:28,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:28,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:28,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:28,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:28,693 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:28,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:28,897 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-06-12 19:43:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:28,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:28,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:28,900 INFO L225 Difference]: With dead ends: 1990 [2021-06-12 19:43:28,901 INFO L226 Difference]: Without dead ends: 1988 [2021-06-12 19:43:28,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-12 19:43:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-06-12 19:43:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-06-12 19:43:28,930 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-06-12 19:43:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:28,930 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-06-12 19:43:28,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-06-12 19:43:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:28,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:28,933 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:29,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21460,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:29,157 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-06-12 19:43:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:29,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579284701] [2021-06-12 19:43:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579284701] [2021-06-12 19:43:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579284701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673150141] [2021-06-12 19:43:29,239 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:29,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:43:29,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673150141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:29,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:29,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:29,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797493695] [2021-06-12 19:43:29,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:29,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:29,310 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:29,397 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-06-12 19:43:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:29,400 INFO L225 Difference]: With dead ends: 2351 [2021-06-12 19:43:29,400 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 19:43:29,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 19:43:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-06-12 19:43:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-06-12 19:43:29,425 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-06-12 19:43:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:29,425 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-06-12 19:43:29,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-06-12 19:43:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:29,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:29,428 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:29,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21461 [2021-06-12 19:43:29,628 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-06-12 19:43:29,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:29,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438646427] [2021-06-12 19:43:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:29,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:29,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438646427] [2021-06-12 19:43:29,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438646427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:29,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555137568] [2021-06-12 19:43:29,704 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:29,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:29,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:29,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555137568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:29,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:29,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:29,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982021626] [2021-06-12 19:43:29,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:29,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:29,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:29,771 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:29,954 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-06-12 19:43:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:29,957 INFO L225 Difference]: With dead ends: 1995 [2021-06-12 19:43:29,957 INFO L226 Difference]: Without dead ends: 1992 [2021-06-12 19:43:29,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-12 19:43:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-06-12 19:43:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-06-12 19:43:29,980 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-06-12 19:43:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:29,980 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-06-12 19:43:29,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-06-12 19:43:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:29,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:29,982 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:30,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21462 [2021-06-12 19:43:30,183 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-06-12 19:43:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:30,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258742174] [2021-06-12 19:43:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:30,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258742174] [2021-06-12 19:43:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258742174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174761613] [2021-06-12 19:43:30,263 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:30,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174761613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:30,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:30,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:30,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045866291] [2021-06-12 19:43:30,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:30,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:30,341 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:30,471 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-06-12 19:43:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:43:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:30,477 INFO L225 Difference]: With dead ends: 3202 [2021-06-12 19:43:30,477 INFO L226 Difference]: Without dead ends: 3202 [2021-06-12 19:43:30,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:43:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-06-12 19:43:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-06-12 19:43:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-06-12 19:43:30,558 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-06-12 19:43:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:30,558 INFO L482 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-06-12 19:43:30,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-06-12 19:43:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:30,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:30,561 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:30,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21463,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:30,783 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-06-12 19:43:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:30,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290477370] [2021-06-12 19:43:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:30,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:30,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290477370] [2021-06-12 19:43:30,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290477370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:30,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779415289] [2021-06-12 19:43:30,859 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:30,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:30,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779415289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:30,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:30,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:30,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807560677] [2021-06-12 19:43:30,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:30,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:30,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:30,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:30,930 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:31,055 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-06-12 19:43:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:43:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:31,060 INFO L225 Difference]: With dead ends: 2785 [2021-06-12 19:43:31,060 INFO L226 Difference]: Without dead ends: 2785 [2021-06-12 19:43:31,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:43:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-06-12 19:43:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-06-12 19:43:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-06-12 19:43:31,097 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-06-12 19:43:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:31,097 INFO L482 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-06-12 19:43:31,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-06-12 19:43:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:31,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:31,100 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:31,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21464 [2021-06-12 19:43:31,323 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-06-12 19:43:31,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:31,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844770305] [2021-06-12 19:43:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:31,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:31,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844770305] [2021-06-12 19:43:31,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844770305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:31,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295062556] [2021-06-12 19:43:31,416 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:31,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:31,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295062556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:31,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:31,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:31,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963594317] [2021-06-12 19:43:31,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:31,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:31,488 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:31,682 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-06-12 19:43:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:31,686 INFO L225 Difference]: With dead ends: 2747 [2021-06-12 19:43:31,686 INFO L226 Difference]: Without dead ends: 2745 [2021-06-12 19:43:31,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-12 19:43:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-06-12 19:43:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-06-12 19:43:31,716 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-06-12 19:43:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:31,716 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-06-12 19:43:31,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-06-12 19:43:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:31,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:31,719 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:31,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21465,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:31,919 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:31,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-06-12 19:43:31,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:31,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727546918] [2021-06-12 19:43:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:31,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:31,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727546918] [2021-06-12 19:43:31,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727546918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:31,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389838057] [2021-06-12 19:43:31,996 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:32,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:32,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:32,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389838057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:32,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:32,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759348947] [2021-06-12 19:43:32,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:32,063 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:32,217 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-06-12 19:43:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:32,220 INFO L225 Difference]: With dead ends: 2659 [2021-06-12 19:43:32,220 INFO L226 Difference]: Without dead ends: 2657 [2021-06-12 19:43:32,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-12 19:43:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-06-12 19:43:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-06-12 19:43:32,248 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-06-12 19:43:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:32,248 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-06-12 19:43:32,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-06-12 19:43:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:32,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:32,251 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:32,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21466 [2021-06-12 19:43:32,453 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-06-12 19:43:32,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:32,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139409770] [2021-06-12 19:43:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:32,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:32,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139409770] [2021-06-12 19:43:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139409770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:32,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530398915] [2021-06-12 19:43:32,527 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:32,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:43:32,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530398915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:32,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:32,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:32,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728617504] [2021-06-12 19:43:32,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:32,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:32,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:32,610 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:32,689 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-06-12 19:43:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:32,694 INFO L225 Difference]: With dead ends: 2808 [2021-06-12 19:43:32,694 INFO L226 Difference]: Without dead ends: 2808 [2021-06-12 19:43:32,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-06-12 19:43:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-06-12 19:43:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-06-12 19:43:32,736 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-06-12 19:43:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:32,736 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-06-12 19:43:32,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-06-12 19:43:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:32,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:32,739 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:32,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21467 [2021-06-12 19:43:32,953 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-06-12 19:43:32,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:32,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453955625] [2021-06-12 19:43:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:33,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:33,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453955625] [2021-06-12 19:43:33,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453955625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:33,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241508106] [2021-06-12 19:43:33,014 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:33,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241508106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:33,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:33,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640847193] [2021-06-12 19:43:33,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:33,077 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:33,236 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-06-12 19:43:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:33,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:33,240 INFO L225 Difference]: With dead ends: 2648 [2021-06-12 19:43:33,240 INFO L226 Difference]: Without dead ends: 2646 [2021-06-12 19:43:33,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-12 19:43:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-06-12 19:43:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-06-12 19:43:33,267 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-06-12 19:43:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:33,267 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-06-12 19:43:33,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-06-12 19:43:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:33,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:33,269 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:33,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21468 [2021-06-12 19:43:33,470 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-06-12 19:43:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688163830] [2021-06-12 19:43:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:33,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:33,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688163830] [2021-06-12 19:43:33,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688163830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:33,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758833325] [2021-06-12 19:43:33,534 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:33,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758833325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:33,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:33,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:33,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303599598] [2021-06-12 19:43:33,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:33,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:33,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:33,603 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:33,701 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-06-12 19:43:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:33,705 INFO L225 Difference]: With dead ends: 2940 [2021-06-12 19:43:33,705 INFO L226 Difference]: Without dead ends: 2940 [2021-06-12 19:43:33,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-06-12 19:43:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-06-12 19:43:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-06-12 19:43:33,732 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-06-12 19:43:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:33,732 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-06-12 19:43:33,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-06-12 19:43:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:33,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:33,734 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:33,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21469 [2021-06-12 19:43:33,949 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-06-12 19:43:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:33,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163336909] [2021-06-12 19:43:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:34,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163336909] [2021-06-12 19:43:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163336909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837102010] [2021-06-12 19:43:34,012 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:34,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:34,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837102010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:34,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:34,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:34,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211998453] [2021-06-12 19:43:34,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:34,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:34,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:34,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:34,073 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:34,220 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-06-12 19:43:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:34,223 INFO L225 Difference]: With dead ends: 2660 [2021-06-12 19:43:34,223 INFO L226 Difference]: Without dead ends: 2657 [2021-06-12 19:43:34,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-12 19:43:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-06-12 19:43:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-06-12 19:43:34,263 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-06-12 19:43:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:34,263 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-06-12 19:43:34,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-06-12 19:43:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:34,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:34,265 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:34,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21470,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:34,466 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:34,466 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-06-12 19:43:34,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:34,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851010661] [2021-06-12 19:43:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:34,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:34,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851010661] [2021-06-12 19:43:34,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851010661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:34,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355429023] [2021-06-12 19:43:34,530 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:34,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:34,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355429023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:34,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:34,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:34,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363377206] [2021-06-12 19:43:34,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:34,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:34,615 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:34,708 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-06-12 19:43:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:34,714 INFO L225 Difference]: With dead ends: 4123 [2021-06-12 19:43:34,714 INFO L226 Difference]: Without dead ends: 4123 [2021-06-12 19:43:34,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:43:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-12 19:43:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-06-12 19:43:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-06-12 19:43:34,776 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-06-12 19:43:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:34,776 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-06-12 19:43:34,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-06-12 19:43:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:34,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:34,779 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:34,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21471,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:34,993 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-06-12 19:43:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869734228] [2021-06-12 19:43:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:35,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869734228] [2021-06-12 19:43:35,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869734228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22167419] [2021-06-12 19:43:35,068 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:35,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:35,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22167419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:35,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:35,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:35,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808210671] [2021-06-12 19:43:35,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:35,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:35,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:35,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:35,128 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:35,285 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-06-12 19:43:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:43:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:35,290 INFO L225 Difference]: With dead ends: 3810 [2021-06-12 19:43:35,290 INFO L226 Difference]: Without dead ends: 3806 [2021-06-12 19:43:35,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-12 19:43:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-06-12 19:43:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-06-12 19:43:35,335 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-06-12 19:43:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:35,335 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-06-12 19:43:35,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-06-12 19:43:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:35,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:35,338 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:35,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21472,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:35,538 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-06-12 19:43:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:35,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835067163] [2021-06-12 19:43:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:35,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835067163] [2021-06-12 19:43:35,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835067163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217320627] [2021-06-12 19:43:35,608 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:35,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:43:35,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217320627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:35,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:35,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:35,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981620304] [2021-06-12 19:43:35,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:35,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:35,677 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:35,812 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-06-12 19:43:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:43:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:35,820 INFO L225 Difference]: With dead ends: 5567 [2021-06-12 19:43:35,820 INFO L226 Difference]: Without dead ends: 5567 [2021-06-12 19:43:35,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-06-12 19:43:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-06-12 19:43:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-06-12 19:43:35,910 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-06-12 19:43:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:35,910 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-06-12 19:43:35,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-06-12 19:43:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:35,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:35,914 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:36,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21473,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:36,115 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:36,115 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-06-12 19:43:36,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:36,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829606603] [2021-06-12 19:43:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:36,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:36,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829606603] [2021-06-12 19:43:36,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829606603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:36,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613037465] [2021-06-12 19:43:36,173 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:36,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:43:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:36,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613037465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:36,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:36,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:36,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073766298] [2021-06-12 19:43:36,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:36,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:36,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:36,246 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:36,341 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-06-12 19:43:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:36,348 INFO L225 Difference]: With dead ends: 5072 [2021-06-12 19:43:36,348 INFO L226 Difference]: Without dead ends: 5072 [2021-06-12 19:43:36,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:43:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-06-12 19:43:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-06-12 19:43:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-06-12 19:43:36,406 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-06-12 19:43:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:36,406 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-06-12 19:43:36,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-06-12 19:43:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:36,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:36,409 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:36,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21474 [2021-06-12 19:43:36,610 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:36,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-06-12 19:43:36,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:36,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81735899] [2021-06-12 19:43:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:36,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:36,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81735899] [2021-06-12 19:43:36,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81735899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:36,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079302376] [2021-06-12 19:43:36,669 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079302376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:36,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:36,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718904831] [2021-06-12 19:43:36,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:36,734 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:36,892 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-06-12 19:43:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:36,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:36,899 INFO L225 Difference]: With dead ends: 5066 [2021-06-12 19:43:36,899 INFO L226 Difference]: Without dead ends: 5064 [2021-06-12 19:43:36,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-12 19:43:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-06-12 19:43:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-06-12 19:43:36,975 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-06-12 19:43:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:36,975 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-06-12 19:43:36,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-06-12 19:43:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:37,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:37,013 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:37,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21475,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:37,215 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-06-12 19:43:37,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:37,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90054105] [2021-06-12 19:43:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:37,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:37,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90054105] [2021-06-12 19:43:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90054105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:37,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511525770] [2021-06-12 19:43:37,274 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:37,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:37,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511525770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:37,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:37,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:37,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524244155] [2021-06-12 19:43:37,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:37,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:37,338 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:37,491 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-06-12 19:43:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:37,497 INFO L225 Difference]: With dead ends: 5001 [2021-06-12 19:43:37,497 INFO L226 Difference]: Without dead ends: 4999 [2021-06-12 19:43:37,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-06-12 19:43:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-06-12 19:43:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-06-12 19:43:37,569 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-06-12 19:43:37,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:37,569 INFO L482 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-06-12 19:43:37,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-06-12 19:43:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:37,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:37,573 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:37,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21476 [2021-06-12 19:43:37,773 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-06-12 19:43:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67537488] [2021-06-12 19:43:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:37,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:37,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67537488] [2021-06-12 19:43:37,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67537488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:37,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358246279] [2021-06-12 19:43:37,829 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:37,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:43:37,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:37,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:37,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358246279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:37,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:37,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:37,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154766096] [2021-06-12 19:43:37,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:37,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:37,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:37,890 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:37,965 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-06-12 19:43:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:37,972 INFO L225 Difference]: With dead ends: 5161 [2021-06-12 19:43:37,972 INFO L226 Difference]: Without dead ends: 5161 [2021-06-12 19:43:37,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-06-12 19:43:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-06-12 19:43:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-06-12 19:43:38,049 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-06-12 19:43:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:38,049 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-06-12 19:43:38,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-06-12 19:43:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:38,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:38,053 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:38,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-06-12 19:43:38,253 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:38,253 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-06-12 19:43:38,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:38,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403912363] [2021-06-12 19:43:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:38,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403912363] [2021-06-12 19:43:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403912363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163086557] [2021-06-12 19:43:38,315 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:38,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:38,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:38,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163086557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215767815] [2021-06-12 19:43:38,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:38,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:38,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:38,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:38,381 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:38,547 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-06-12 19:43:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:38,553 INFO L225 Difference]: With dead ends: 5011 [2021-06-12 19:43:38,553 INFO L226 Difference]: Without dead ends: 5009 [2021-06-12 19:43:38,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-06-12 19:43:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-06-12 19:43:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-06-12 19:43:38,615 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-06-12 19:43:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:38,615 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-06-12 19:43:38,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-06-12 19:43:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:38,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:38,619 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:38,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21478 [2021-06-12 19:43:38,837 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-06-12 19:43:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:38,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612619799] [2021-06-12 19:43:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:38,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612619799] [2021-06-12 19:43:38,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612619799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588738332] [2021-06-12 19:43:38,900 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:38,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:43:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:38,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:38,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588738332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:38,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:38,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:38,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71799532] [2021-06-12 19:43:38,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:38,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:38,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:38,989 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:39,092 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-06-12 19:43:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:39,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:39,103 INFO L225 Difference]: With dead ends: 5260 [2021-06-12 19:43:39,104 INFO L226 Difference]: Without dead ends: 5260 [2021-06-12 19:43:39,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-06-12 19:43:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-06-12 19:43:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-06-12 19:43:39,191 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-06-12 19:43:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:39,191 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-06-12 19:43:39,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-06-12 19:43:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:39,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:39,196 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:39,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21479,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:39,418 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-06-12 19:43:39,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:39,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712250176] [2021-06-12 19:43:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:39,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712250176] [2021-06-12 19:43:39,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712250176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080430866] [2021-06-12 19:43:39,479 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:39,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:43:39,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:39,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:39,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080430866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:39,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:39,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:39,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209449851] [2021-06-12 19:43:39,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:39,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:39,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:39,548 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:39,700 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-06-12 19:43:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:39,706 INFO L225 Difference]: With dead ends: 4999 [2021-06-12 19:43:39,707 INFO L226 Difference]: Without dead ends: 4996 [2021-06-12 19:43:39,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-06-12 19:43:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-06-12 19:43:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-06-12 19:43:39,796 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-06-12 19:43:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:39,797 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-06-12 19:43:39,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-06-12 19:43:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:39,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:39,800 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:40,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21480 [2021-06-12 19:43:40,001 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-06-12 19:43:40,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:40,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663024949] [2021-06-12 19:43:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:40,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663024949] [2021-06-12 19:43:40,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663024949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934732889] [2021-06-12 19:43:40,059 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934732889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:40,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:40,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062124875] [2021-06-12 19:43:40,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:40,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:40,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:40,132 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:40,239 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-06-12 19:43:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:43:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:40,253 INFO L225 Difference]: With dead ends: 8484 [2021-06-12 19:43:40,253 INFO L226 Difference]: Without dead ends: 8484 [2021-06-12 19:43:40,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:43:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-12 19:43:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-06-12 19:43:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-06-12 19:43:40,372 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-06-12 19:43:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:40,372 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-06-12 19:43:40,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-06-12 19:43:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:40,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:40,376 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:40,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21481,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:40,598 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-06-12 19:43:40,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:40,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140340303] [2021-06-12 19:43:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140340303] [2021-06-12 19:43:40,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140340303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532133263] [2021-06-12 19:43:40,660 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:40,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532133263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:40,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628818519] [2021-06-12 19:43:40,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:40,721 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:40,904 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-06-12 19:43:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:43:40,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:40,917 INFO L225 Difference]: With dead ends: 8250 [2021-06-12 19:43:40,917 INFO L226 Difference]: Without dead ends: 8246 [2021-06-12 19:43:40,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-06-12 19:43:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-06-12 19:43:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-06-12 19:43:41,037 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-06-12 19:43:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:41,037 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-06-12 19:43:41,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-06-12 19:43:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:41,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:41,041 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:41,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21482,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:41,242 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-06-12 19:43:41,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:41,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846387222] [2021-06-12 19:43:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:41,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846387222] [2021-06-12 19:43:41,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846387222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640963527] [2021-06-12 19:43:41,326 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:41,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:43:41,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:41,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640963527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:41,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:41,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449111799] [2021-06-12 19:43:41,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:41,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:41,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:41,402 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:41,549 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-06-12 19:43:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:43:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:41,568 INFO L225 Difference]: With dead ends: 11106 [2021-06-12 19:43:41,568 INFO L226 Difference]: Without dead ends: 11106 [2021-06-12 19:43:41,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-12 19:43:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-06-12 19:43:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-06-12 19:43:41,735 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-06-12 19:43:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:41,735 INFO L482 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-06-12 19:43:41,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-06-12 19:43:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:41,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:41,739 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:41,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21483 [2021-06-12 19:43:41,940 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-06-12 19:43:41,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:41,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017121243] [2021-06-12 19:43:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:42,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017121243] [2021-06-12 19:43:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017121243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652694387] [2021-06-12 19:43:42,024 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:42,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:42,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652694387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:42,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:42,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206374838] [2021-06-12 19:43:42,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:42,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:42,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:42,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:42,145 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:42,327 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-06-12 19:43:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:43:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:42,347 INFO L225 Difference]: With dead ends: 10860 [2021-06-12 19:43:42,347 INFO L226 Difference]: Without dead ends: 10855 [2021-06-12 19:43:42,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-06-12 19:43:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-06-12 19:43:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-06-12 19:43:42,516 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-06-12 19:43:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:42,516 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-06-12 19:43:42,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-06-12 19:43:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:42,520 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:42,521 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:42,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21484 [2021-06-12 19:43:42,721 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-06-12 19:43:42,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:42,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594072304] [2021-06-12 19:43:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:42,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594072304] [2021-06-12 19:43:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594072304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970235728] [2021-06-12 19:43:42,823 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:42,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:43:42,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:42,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:42,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:42,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970235728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:42,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:43:42,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434503520] [2021-06-12 19:43:42,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:42,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:42,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:42,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:42,895 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:43,102 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-06-12 19:43:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:43,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:43,126 INFO L225 Difference]: With dead ends: 13741 [2021-06-12 19:43:43,126 INFO L226 Difference]: Without dead ends: 13741 [2021-06-12 19:43:43,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:43:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-06-12 19:43:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-06-12 19:43:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-06-12 19:43:43,342 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-06-12 19:43:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:43,342 INFO L482 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-06-12 19:43:43,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-06-12 19:43:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:43,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:43,347 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:43,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21485,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:43,548 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-06-12 19:43:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:43,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959905303] [2021-06-12 19:43:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:43,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:43,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959905303] [2021-06-12 19:43:43,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959905303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:43,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906347948] [2021-06-12 19:43:43,608 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:43,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:43,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:43,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:43,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906347948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:43,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:43,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:43,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98725004] [2021-06-12 19:43:43,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:43,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:43,676 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:43,797 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-06-12 19:43:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:43:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:43,819 INFO L225 Difference]: With dead ends: 13222 [2021-06-12 19:43:43,820 INFO L226 Difference]: Without dead ends: 13222 [2021-06-12 19:43:43,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:43:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-12 19:43:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-06-12 19:43:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-06-12 19:43:44,083 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-06-12 19:43:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:44,083 INFO L482 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-06-12 19:43:44,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-06-12 19:43:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:44,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:44,088 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:44,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21486 [2021-06-12 19:43:44,289 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-06-12 19:43:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:44,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695876145] [2021-06-12 19:43:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:44,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695876145] [2021-06-12 19:43:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695876145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747476043] [2021-06-12 19:43:44,348 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747476043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:44,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:44,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525238116] [2021-06-12 19:43:44,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:44,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:44,403 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:44,589 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-06-12 19:43:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:44,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:44,612 INFO L225 Difference]: With dead ends: 13713 [2021-06-12 19:43:44,613 INFO L226 Difference]: Without dead ends: 13711 [2021-06-12 19:43:44,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-06-12 19:43:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-06-12 19:43:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-06-12 19:43:44,826 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-06-12 19:43:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:44,826 INFO L482 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-06-12 19:43:44,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-06-12 19:43:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:44,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:44,832 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:45,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21487,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:45,032 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-06-12 19:43:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:45,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467460069] [2021-06-12 19:43:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:45,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:45,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467460069] [2021-06-12 19:43:45,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467460069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:45,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323132882] [2021-06-12 19:43:45,107 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:45,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:45,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:45,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323132882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:45,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:45,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:45,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510989952] [2021-06-12 19:43:45,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:45,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:45,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:45,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:45,161 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:45,334 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-06-12 19:43:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:45,358 INFO L225 Difference]: With dead ends: 13655 [2021-06-12 19:43:45,359 INFO L226 Difference]: Without dead ends: 13653 [2021-06-12 19:43:45,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-06-12 19:43:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-06-12 19:43:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-06-12 19:43:45,564 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-06-12 19:43:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:45,564 INFO L482 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-06-12 19:43:45,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-06-12 19:43:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:45,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:45,569 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:45,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21488 [2021-06-12 19:43:45,770 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-06-12 19:43:45,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:45,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970551733] [2021-06-12 19:43:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:45,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:45,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970551733] [2021-06-12 19:43:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970551733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:45,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520019626] [2021-06-12 19:43:45,833 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:45,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:43:45,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:46,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520019626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:46,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:43:46,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769304620] [2021-06-12 19:43:46,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:43:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:43:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:46,007 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:46,101 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-06-12 19:43:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:43:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:46,126 INFO L225 Difference]: With dead ends: 13677 [2021-06-12 19:43:46,127 INFO L226 Difference]: Without dead ends: 13677 [2021-06-12 19:43:46,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-06-12 19:43:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-06-12 19:43:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-06-12 19:43:46,319 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-06-12 19:43:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:46,319 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-06-12 19:43:46,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-06-12 19:43:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:46,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:46,325 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:46,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21489 [2021-06-12 19:43:46,527 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-06-12 19:43:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:46,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254594134] [2021-06-12 19:43:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:46,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:46,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254594134] [2021-06-12 19:43:46,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254594134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988515852] [2021-06-12 19:43:46,592 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:46,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:46,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:46,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988515852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:46,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:46,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623037905] [2021-06-12 19:43:46,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:46,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:46,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:46,648 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:46,850 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-06-12 19:43:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:46,873 INFO L225 Difference]: With dead ends: 13337 [2021-06-12 19:43:46,873 INFO L226 Difference]: Without dead ends: 13335 [2021-06-12 19:43:46,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-06-12 19:43:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-06-12 19:43:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-06-12 19:43:47,080 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-06-12 19:43:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:47,080 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-06-12 19:43:47,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-06-12 19:43:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:47,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:47,085 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:47,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21490,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:47,308 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:47,308 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-06-12 19:43:47,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:47,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747674933] [2021-06-12 19:43:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:47,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:47,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747674933] [2021-06-12 19:43:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747674933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:47,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362860001] [2021-06-12 19:43:47,368 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:47,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:43:47,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:47,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:47,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362860001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:47,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:47,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:47,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782571257] [2021-06-12 19:43:47,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:47,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:47,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:47,431 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:47,547 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-06-12 19:43:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:43:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:47,572 INFO L225 Difference]: With dead ends: 14025 [2021-06-12 19:43:47,572 INFO L226 Difference]: Without dead ends: 14025 [2021-06-12 19:43:47,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-12 19:43:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-06-12 19:43:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-06-12 19:43:47,878 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-06-12 19:43:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:47,878 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-06-12 19:43:47,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-06-12 19:43:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:47,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:47,884 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:48,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21491,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:48,084 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-06-12 19:43:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:48,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905497235] [2021-06-12 19:43:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:48,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:48,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905497235] [2021-06-12 19:43:48,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905497235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217526644] [2021-06-12 19:43:48,158 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:48,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:48,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:48,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:48,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217526644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:48,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:48,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:48,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33425330] [2021-06-12 19:43:48,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:48,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:48,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:48,223 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:48,437 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-06-12 19:43:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:48,465 INFO L225 Difference]: With dead ends: 13344 [2021-06-12 19:43:48,465 INFO L226 Difference]: Without dead ends: 13341 [2021-06-12 19:43:48,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-06-12 19:43:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-06-12 19:43:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-06-12 19:43:48,664 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-06-12 19:43:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:48,665 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-06-12 19:43:48,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-06-12 19:43:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:48,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:48,670 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:48,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21492 [2021-06-12 19:43:48,871 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-06-12 19:43:48,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:48,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212080192] [2021-06-12 19:43:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:48,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212080192] [2021-06-12 19:43:48,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212080192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633419859] [2021-06-12 19:43:48,930 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:48,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633419859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:48,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:48,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:48,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356986623] [2021-06-12 19:43:48,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:48,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:48,997 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:49,148 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-06-12 19:43:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:43:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:49,194 INFO L225 Difference]: With dead ends: 23387 [2021-06-12 19:43:49,194 INFO L226 Difference]: Without dead ends: 23387 [2021-06-12 19:43:49,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:43:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-06-12 19:43:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-06-12 19:43:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-06-12 19:43:49,598 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-06-12 19:43:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:49,598 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-06-12 19:43:49,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-06-12 19:43:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:49,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:49,603 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:49,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21493 [2021-06-12 19:43:49,804 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:49,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-06-12 19:43:49,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:49,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535775386] [2021-06-12 19:43:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:49,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:49,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535775386] [2021-06-12 19:43:49,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535775386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:49,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907472844] [2021-06-12 19:43:49,980 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:50,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:50,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907472844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:50,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:50,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:50,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117042143] [2021-06-12 19:43:50,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:50,043 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:50,289 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-06-12 19:43:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:43:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:50,333 INFO L225 Difference]: With dead ends: 23234 [2021-06-12 19:43:50,333 INFO L226 Difference]: Without dead ends: 23230 [2021-06-12 19:43:50,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-06-12 19:43:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-06-12 19:43:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-06-12 19:43:50,764 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-06-12 19:43:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:50,764 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-06-12 19:43:50,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-06-12 19:43:50,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:50,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:50,769 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:50,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21494,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:50,970 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-06-12 19:43:50,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:50,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611040501] [2021-06-12 19:43:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:51,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:51,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611040501] [2021-06-12 19:43:51,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611040501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:51,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776579472] [2021-06-12 19:43:51,044 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:51,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:43:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:51,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776579472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:51,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:51,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259921650] [2021-06-12 19:43:51,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:51,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:51,117 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:51,309 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-06-12 19:43:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:43:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:51,372 INFO L225 Difference]: With dead ends: 28918 [2021-06-12 19:43:51,373 INFO L226 Difference]: Without dead ends: 28918 [2021-06-12 19:43:51,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:43:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-06-12 19:43:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-06-12 19:43:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-06-12 19:43:52,022 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-06-12 19:43:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:52,022 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-06-12 19:43:52,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-06-12 19:43:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:52,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:52,028 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:52,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21495,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:52,229 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-06-12 19:43:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:52,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150461414] [2021-06-12 19:43:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:52,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150461414] [2021-06-12 19:43:52,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150461414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960239320] [2021-06-12 19:43:52,313 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:52,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960239320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:52,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331677515] [2021-06-12 19:43:52,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:52,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:52,379 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:52,707 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-06-12 19:43:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:43:52,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:52,782 INFO L225 Difference]: With dead ends: 28872 [2021-06-12 19:43:52,782 INFO L226 Difference]: Without dead ends: 28867 [2021-06-12 19:43:52,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-06-12 19:43:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-06-12 19:43:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-06-12 19:43:53,359 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-06-12 19:43:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:53,359 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-06-12 19:43:53,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-06-12 19:43:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:53,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:53,364 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:53,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21496 [2021-06-12 19:43:53,565 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-06-12 19:43:53,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:53,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55643284] [2021-06-12 19:43:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:53,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55643284] [2021-06-12 19:43:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55643284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328120979] [2021-06-12 19:43:53,640 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:53,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:43:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:53,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328120979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:53,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:53,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:53,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964318004] [2021-06-12 19:43:53,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:53,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:53,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:53,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:53,707 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:54,041 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-06-12 19:43:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:43:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:54,110 INFO L225 Difference]: With dead ends: 31093 [2021-06-12 19:43:54,110 INFO L226 Difference]: Without dead ends: 31093 [2021-06-12 19:43:54,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:43:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-06-12 19:43:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-06-12 19:43:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-06-12 19:43:54,686 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-06-12 19:43:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:54,686 INFO L482 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-06-12 19:43:54,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-06-12 19:43:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:54,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:54,692 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:54,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21497 [2021-06-12 19:43:54,893 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-06-12 19:43:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:54,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484693383] [2021-06-12 19:43:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:54,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484693383] [2021-06-12 19:43:54,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484693383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823535740] [2021-06-12 19:43:54,963 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:54,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:43:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:55,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823535740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:55,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:55,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988978563] [2021-06-12 19:43:55,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:55,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:55,020 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:55,305 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-06-12 19:43:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:43:55,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:55,370 INFO L225 Difference]: With dead ends: 31001 [2021-06-12 19:43:55,371 INFO L226 Difference]: Without dead ends: 30995 [2021-06-12 19:43:55,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-06-12 19:43:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-06-12 19:43:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-06-12 19:43:56,356 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-06-12 19:43:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:56,356 INFO L482 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-06-12 19:43:56,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-06-12 19:43:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:56,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:56,364 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:56,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21498 [2021-06-12 19:43:56,567 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-06-12 19:43:56,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:56,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752651377] [2021-06-12 19:43:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:56,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:56,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752651377] [2021-06-12 19:43:56,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752651377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:56,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901797880] [2021-06-12 19:43:56,634 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:56,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:56,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901797880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:56,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:56,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:43:56,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437122941] [2021-06-12 19:43:56,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:43:56,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:43:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:43:56,697 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:57,149 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-06-12 19:43:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:43:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:57,229 INFO L225 Difference]: With dead ends: 32605 [2021-06-12 19:43:57,229 INFO L226 Difference]: Without dead ends: 32605 [2021-06-12 19:43:57,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:43:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-06-12 19:43:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-06-12 19:43:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-06-12 19:43:58,045 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-06-12 19:43:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:58,045 INFO L482 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-06-12 19:43:58,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:58,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-06-12 19:43:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:58,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:58,053 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:58,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21499 [2021-06-12 19:43:58,253 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-06-12 19:43:58,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:58,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106243977] [2021-06-12 19:43:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:43:58,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:58,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106243977] [2021-06-12 19:43:58,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106243977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:58,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007194484] [2021-06-12 19:43:58,296 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:58,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:58,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:43:58,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007194484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:58,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:58,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:43:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213694965] [2021-06-12 19:43:58,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:43:58,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:58,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:43:58,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:58,356 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:58,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:58,642 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-06-12 19:43:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:43:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:43:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:58,828 INFO L225 Difference]: With dead ends: 32258 [2021-06-12 19:43:58,828 INFO L226 Difference]: Without dead ends: 32258 [2021-06-12 19:43:58,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-06-12 19:43:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-06-12 19:43:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-06-12 19:43:59,607 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-06-12 19:43:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:59,607 INFO L482 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-06-12 19:43:59,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-06-12 19:43:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:43:59,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:59,615 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:59,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21500 [2021-06-12 19:43:59,838 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-06-12 19:43:59,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:59,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409334740] [2021-06-12 19:43:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:43:59,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409334740] [2021-06-12 19:43:59,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409334740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547260379] [2021-06-12 19:43:59,880 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:59,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:43:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:43:59,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547260379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:59,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:59,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:43:59,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656644356] [2021-06-12 19:43:59,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:43:59,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:59,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:43:59,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:59,937 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:00,362 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-06-12 19:44:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:00,440 INFO L225 Difference]: With dead ends: 36772 [2021-06-12 19:44:00,440 INFO L226 Difference]: Without dead ends: 36768 [2021-06-12 19:44:00,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-06-12 19:44:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-06-12 19:44:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-06-12 19:44:01,302 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-06-12 19:44:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:01,302 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-06-12 19:44:01,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-06-12 19:44:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:01,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:01,309 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:01,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21501 [2021-06-12 19:44:01,510 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-06-12 19:44:01,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:01,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120111943] [2021-06-12 19:44:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:01,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:01,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120111943] [2021-06-12 19:44:01,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120111943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:01,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622157710] [2021-06-12 19:44:01,559 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:01,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:01,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:01,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622157710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:01,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:01,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:01,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586048344] [2021-06-12 19:44:01,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:01,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:01,614 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:02,017 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-06-12 19:44:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:02,102 INFO L225 Difference]: With dead ends: 36756 [2021-06-12 19:44:02,102 INFO L226 Difference]: Without dead ends: 36753 [2021-06-12 19:44:02,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-06-12 19:44:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-06-12 19:44:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-06-12 19:44:03,036 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-06-12 19:44:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:03,036 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-06-12 19:44:03,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-06-12 19:44:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:03,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:03,043 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:03,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21502 [2021-06-12 19:44:03,244 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-06-12 19:44:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:03,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948676366] [2021-06-12 19:44:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:03,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:03,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948676366] [2021-06-12 19:44:03,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948676366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:03,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292402735] [2021-06-12 19:44:03,297 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:03,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:03,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:03,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292402735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:03,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:03,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:03,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269100657] [2021-06-12 19:44:03,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:03,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:03,364 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:03,779 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-06-12 19:44:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:44:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:03,884 INFO L225 Difference]: With dead ends: 38596 [2021-06-12 19:44:03,885 INFO L226 Difference]: Without dead ends: 38596 [2021-06-12 19:44:03,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:44:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-06-12 19:44:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-06-12 19:44:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-06-12 19:44:04,851 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-06-12 19:44:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:04,851 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-06-12 19:44:04,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-06-12 19:44:04,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:04,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:04,858 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:05,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21503,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:05,058 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-06-12 19:44:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:05,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685865063] [2021-06-12 19:44:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:05,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:05,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685865063] [2021-06-12 19:44:05,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685865063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:05,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099961029] [2021-06-12 19:44:05,109 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:05,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:44:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:05,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:05,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099961029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:05,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:05,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:05,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119618099] [2021-06-12 19:44:05,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:05,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:05,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:05,166 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:05,595 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-06-12 19:44:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:05,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:44:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:05,713 INFO L225 Difference]: With dead ends: 38447 [2021-06-12 19:44:05,713 INFO L226 Difference]: Without dead ends: 38444 [2021-06-12 19:44:05,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-06-12 19:44:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-06-12 19:44:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-06-12 19:44:06,535 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-06-12 19:44:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:06,536 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-06-12 19:44:06,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-06-12 19:44:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:06,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:06,542 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:06,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21504,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:06,743 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-06-12 19:44:06,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:06,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849103838] [2021-06-12 19:44:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:06,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849103838] [2021-06-12 19:44:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849103838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015850487] [2021-06-12 19:44:06,799 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:07,008 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-12 19:44:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:07,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015850487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:07,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:07,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:07,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495403777] [2021-06-12 19:44:07,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:07,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:07,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:07,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:07,051 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:07,346 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-06-12 19:44:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:44:07,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:44:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:07,458 INFO L225 Difference]: With dead ends: 47743 [2021-06-12 19:44:07,458 INFO L226 Difference]: Without dead ends: 47743 [2021-06-12 19:44:07,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-06-12 19:44:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-06-12 19:44:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-06-12 19:44:08,730 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-06-12 19:44:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:08,730 INFO L482 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-06-12 19:44:08,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-06-12 19:44:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:08,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:08,737 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:08,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21505,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:08,938 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:08,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:08,938 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-06-12 19:44:08,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:08,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327744922] [2021-06-12 19:44:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:08,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327744922] [2021-06-12 19:44:08,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327744922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352112224] [2021-06-12 19:44:08,997 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:09,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:09,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:09,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352112224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:09,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:09,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:09,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977177435] [2021-06-12 19:44:09,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:09,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:09,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:09,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:09,056 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:09,619 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-06-12 19:44:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:44:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:09,730 INFO L225 Difference]: With dead ends: 46705 [2021-06-12 19:44:09,730 INFO L226 Difference]: Without dead ends: 46701 [2021-06-12 19:44:09,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:44:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-06-12 19:44:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-06-12 19:44:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-06-12 19:44:10,902 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-06-12 19:44:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-06-12 19:44:10,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-06-12 19:44:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:10,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:10,909 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:11,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21506,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:11,109 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-06-12 19:44:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:11,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615789408] [2021-06-12 19:44:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:11,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:11,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615789408] [2021-06-12 19:44:11,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615789408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:11,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604338699] [2021-06-12 19:44:11,162 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:11,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:44:11,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:11,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604338699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:11,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:11,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:11,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5637980] [2021-06-12 19:44:11,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:11,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:11,222 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:11,839 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-06-12 19:44:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:44:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:11,972 INFO L225 Difference]: With dead ends: 49378 [2021-06-12 19:44:11,972 INFO L226 Difference]: Without dead ends: 49378 [2021-06-12 19:44:11,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-06-12 19:44:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-06-12 19:44:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-06-12 19:44:13,230 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-06-12 19:44:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:13,230 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-06-12 19:44:13,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-06-12 19:44:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:13,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:13,236 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:13,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21507 [2021-06-12 19:44:13,438 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-06-12 19:44:13,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:13,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8083906] [2021-06-12 19:44:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:13,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8083906] [2021-06-12 19:44:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8083906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501590318] [2021-06-12 19:44:13,493 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:13,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:13,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:13,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:13,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501590318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:13,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:13,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:13,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541336017] [2021-06-12 19:44:13,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:13,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:13,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:13,551 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:14,095 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-06-12 19:44:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:44:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:14,210 INFO L225 Difference]: With dead ends: 49336 [2021-06-12 19:44:14,210 INFO L226 Difference]: Without dead ends: 49333 [2021-06-12 19:44:14,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-06-12 19:44:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-06-12 19:44:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-06-12 19:44:15,494 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-06-12 19:44:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:15,494 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-06-12 19:44:15,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-06-12 19:44:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:15,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:15,501 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:15,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:15,702 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-06-12 19:44:15,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:15,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560039983] [2021-06-12 19:44:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:15,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560039983] [2021-06-12 19:44:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560039983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604573724] [2021-06-12 19:44:15,760 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:15,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:44:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:15,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604573724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:15,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:15,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:15,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705624084] [2021-06-12 19:44:15,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:15,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:15,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:15,823 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:16,377 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-06-12 19:44:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:16,513 INFO L225 Difference]: With dead ends: 55383 [2021-06-12 19:44:16,513 INFO L226 Difference]: Without dead ends: 55383 [2021-06-12 19:44:16,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-06-12 19:44:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-06-12 19:44:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-06-12 19:44:17,837 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-06-12 19:44:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:17,837 INFO L482 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-06-12 19:44:17,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-06-12 19:44:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:17,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:17,844 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:18,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21509 [2021-06-12 19:44:18,044 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-06-12 19:44:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:18,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990008122] [2021-06-12 19:44:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:18,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990008122] [2021-06-12 19:44:18,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990008122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005263270] [2021-06-12 19:44:18,124 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:18,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:44:18,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:18,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:18,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005263270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:18,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:18,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:18,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148056760] [2021-06-12 19:44:18,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:18,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:18,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:18,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:18,186 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:18,781 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-06-12 19:44:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:44:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:18,884 INFO L225 Difference]: With dead ends: 46465 [2021-06-12 19:44:18,885 INFO L226 Difference]: Without dead ends: 46461 [2021-06-12 19:44:18,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:44:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-06-12 19:44:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-06-12 19:44:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-06-12 19:44:20,086 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-06-12 19:44:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:20,086 INFO L482 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-06-12 19:44:20,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-06-12 19:44:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:20,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:20,094 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:20,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21510 [2021-06-12 19:44:20,305 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-06-12 19:44:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:20,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761743421] [2021-06-12 19:44:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:20,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:20,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761743421] [2021-06-12 19:44:20,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761743421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:20,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487982012] [2021-06-12 19:44:20,367 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:20,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:20,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487982012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:20,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:20,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460046200] [2021-06-12 19:44:20,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:20,426 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:20,739 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-06-12 19:44:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:44:20,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:20,873 INFO L225 Difference]: With dead ends: 53081 [2021-06-12 19:44:20,874 INFO L226 Difference]: Without dead ends: 53081 [2021-06-12 19:44:20,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-06-12 19:44:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-06-12 19:44:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-06-12 19:44:22,222 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-06-12 19:44:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-06-12 19:44:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-06-12 19:44:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:22,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:22,229 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:22,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21511 [2021-06-12 19:44:22,430 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:22,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-06-12 19:44:22,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:22,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76669258] [2021-06-12 19:44:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:22,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76669258] [2021-06-12 19:44:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76669258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572611817] [2021-06-12 19:44:22,746 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:22,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:22,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572611817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:22,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:22,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:22,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189393209] [2021-06-12 19:44:22,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:22,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:22,818 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:23,189 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-06-12 19:44:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:23,327 INFO L225 Difference]: With dead ends: 50456 [2021-06-12 19:44:23,327 INFO L226 Difference]: Without dead ends: 50451 [2021-06-12 19:44:23,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:44:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-06-12 19:44:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-06-12 19:44:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-06-12 19:44:24,652 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-06-12 19:44:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:24,653 INFO L482 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-06-12 19:44:24,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-06-12 19:44:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:24,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:24,659 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:24,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21512 [2021-06-12 19:44:24,860 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-06-12 19:44:24,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:24,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270907808] [2021-06-12 19:44:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:24,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:24,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270907808] [2021-06-12 19:44:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270907808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:24,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731590869] [2021-06-12 19:44:24,918 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:24,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:44:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:24,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731590869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:24,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:24,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:24,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371983781] [2021-06-12 19:44:24,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:24,978 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:25,640 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-06-12 19:44:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:25,772 INFO L225 Difference]: With dead ends: 51683 [2021-06-12 19:44:25,773 INFO L226 Difference]: Without dead ends: 51683 [2021-06-12 19:44:25,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:44:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-06-12 19:44:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-06-12 19:44:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-06-12 19:44:27,182 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-06-12 19:44:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:27,182 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-06-12 19:44:27,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-06-12 19:44:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:27,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:27,189 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:27,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21513 [2021-06-12 19:44:27,390 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:27,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-06-12 19:44:27,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:27,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725694512] [2021-06-12 19:44:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:27,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:27,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725694512] [2021-06-12 19:44:27,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725694512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:27,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313929646] [2021-06-12 19:44:27,454 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:27,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:27,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313929646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:27,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:27,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:27,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740378944] [2021-06-12 19:44:27,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:27,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:27,520 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:28,147 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-06-12 19:44:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:44:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:28,285 INFO L225 Difference]: With dead ends: 51540 [2021-06-12 19:44:28,285 INFO L226 Difference]: Without dead ends: 51537 [2021-06-12 19:44:28,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:44:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-06-12 19:44:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-06-12 19:44:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-06-12 19:44:29,696 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-06-12 19:44:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:29,696 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-06-12 19:44:29,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-06-12 19:44:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:29,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:29,706 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:29,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21514 [2021-06-12 19:44:29,921 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-06-12 19:44:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:29,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525598720] [2021-06-12 19:44:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:30,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:30,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525598720] [2021-06-12 19:44:30,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525598720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:30,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371677474] [2021-06-12 19:44:30,034 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:30,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:30,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:30,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:30,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371677474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:30,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:30,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708266221] [2021-06-12 19:44:30,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:30,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:30,099 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:30,652 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-06-12 19:44:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:30,807 INFO L225 Difference]: With dead ends: 54243 [2021-06-12 19:44:30,807 INFO L226 Difference]: Without dead ends: 54243 [2021-06-12 19:44:30,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-06-12 19:44:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-06-12 19:44:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-06-12 19:44:31,585 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-06-12 19:44:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:31,586 INFO L482 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-06-12 19:44:31,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-06-12 19:44:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:31,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:31,592 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:31,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:31,793 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-06-12 19:44:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:31,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954727236] [2021-06-12 19:44:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:31,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954727236] [2021-06-12 19:44:31,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954727236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528344675] [2021-06-12 19:44:31,863 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:31,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:44:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:31,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528344675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:31,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:31,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:31,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185507841] [2021-06-12 19:44:31,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:31,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:31,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:31,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:31,919 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:32,349 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-06-12 19:44:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:44:32,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:32,393 INFO L225 Difference]: With dead ends: 20359 [2021-06-12 19:44:32,394 INFO L226 Difference]: Without dead ends: 20355 [2021-06-12 19:44:32,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:44:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-06-12 19:44:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-06-12 19:44:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-06-12 19:44:32,683 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-06-12 19:44:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:32,683 INFO L482 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-06-12 19:44:32,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-06-12 19:44:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:32,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:32,690 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:32,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21516,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:32,890 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-06-12 19:44:32,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:32,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002505823] [2021-06-12 19:44:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:32,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:32,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002505823] [2021-06-12 19:44:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002505823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:32,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581340547] [2021-06-12 19:44:32,948 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:33,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581340547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:33,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:33,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:33,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507184856] [2021-06-12 19:44:33,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:33,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:33,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:33,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:33,006 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:33,334 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-06-12 19:44:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:33,390 INFO L225 Difference]: With dead ends: 28252 [2021-06-12 19:44:33,390 INFO L226 Difference]: Without dead ends: 28252 [2021-06-12 19:44:33,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-06-12 19:44:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-06-12 19:44:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-06-12 19:44:33,895 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-06-12 19:44:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:33,895 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-06-12 19:44:33,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-06-12 19:44:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:33,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:33,901 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:34,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21517,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:34,102 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:34,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-06-12 19:44:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:34,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600121914] [2021-06-12 19:44:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600121914] [2021-06-12 19:44:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600121914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299762451] [2021-06-12 19:44:34,165 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:34,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:34,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:34,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:34,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299762451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:34,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:34,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129113571] [2021-06-12 19:44:34,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:34,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:34,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:34,218 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:34,441 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-06-12 19:44:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:34,479 INFO L225 Difference]: With dead ends: 20123 [2021-06-12 19:44:34,479 INFO L226 Difference]: Without dead ends: 20118 [2021-06-12 19:44:34,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:44:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-06-12 19:44:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-06-12 19:44:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-06-12 19:44:34,928 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-06-12 19:44:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:34,929 INFO L482 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-06-12 19:44:34,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-06-12 19:44:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:34,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:34,936 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:35,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21518,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:35,136 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:35,136 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-06-12 19:44:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:35,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961203523] [2021-06-12 19:44:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:35,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:35,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961203523] [2021-06-12 19:44:35,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961203523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:35,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262561907] [2021-06-12 19:44:35,201 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:35,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:44:35,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:35,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:35,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262561907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:35,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:35,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:35,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256699139] [2021-06-12 19:44:35,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:35,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:35,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:35,268 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:35,476 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-06-12 19:44:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:35,514 INFO L225 Difference]: With dead ends: 21427 [2021-06-12 19:44:35,514 INFO L226 Difference]: Without dead ends: 21427 [2021-06-12 19:44:35,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:44:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-06-12 19:44:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-06-12 19:44:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-06-12 19:44:35,986 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-06-12 19:44:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:35,986 INFO L482 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-06-12 19:44:35,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-06-12 19:44:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:35,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:35,992 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:36,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21519 [2021-06-12 19:44:36,193 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-06-12 19:44:36,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:36,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665774551] [2021-06-12 19:44:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:36,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:36,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665774551] [2021-06-12 19:44:36,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665774551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253835067] [2021-06-12 19:44:36,274 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:36,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:36,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253835067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:36,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700849967] [2021-06-12 19:44:36,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:36,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:36,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:36,328 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:36,698 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-06-12 19:44:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:44:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:36,732 INFO L225 Difference]: With dead ends: 20188 [2021-06-12 19:44:36,732 INFO L226 Difference]: Without dead ends: 20182 [2021-06-12 19:44:36,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:44:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-06-12 19:44:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-06-12 19:44:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-06-12 19:44:37,075 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-06-12 19:44:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:37,075 INFO L482 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-06-12 19:44:37,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-06-12 19:44:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:37,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:37,081 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:37,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21520,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:37,282 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-06-12 19:44:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:37,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680576578] [2021-06-12 19:44:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:37,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680576578] [2021-06-12 19:44:37,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680576578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384317671] [2021-06-12 19:44:37,349 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:37,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:37,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384317671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:37,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:44:37,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809537660] [2021-06-12 19:44:37,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:37,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:37,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:37,535 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:37,818 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-06-12 19:44:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:44:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:37,860 INFO L225 Difference]: With dead ends: 20611 [2021-06-12 19:44:37,860 INFO L226 Difference]: Without dead ends: 20611 [2021-06-12 19:44:37,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:44:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-06-12 19:44:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-06-12 19:44:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-06-12 19:44:38,321 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-06-12 19:44:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:38,321 INFO L482 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-06-12 19:44:38,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-06-12 19:44:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:38,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:38,328 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:38,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21521 [2021-06-12 19:44:38,529 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-06-12 19:44:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:38,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353182259] [2021-06-12 19:44:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:38,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:38,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353182259] [2021-06-12 19:44:38,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353182259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:38,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85444103] [2021-06-12 19:44:38,584 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:38,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:44:38,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:38,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85444103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:38,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:38,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:38,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397722356] [2021-06-12 19:44:38,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:38,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:38,662 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:38,859 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-06-12 19:44:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:38,904 INFO L225 Difference]: With dead ends: 19840 [2021-06-12 19:44:38,904 INFO L226 Difference]: Without dead ends: 19840 [2021-06-12 19:44:38,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:44:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-06-12 19:44:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-06-12 19:44:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-06-12 19:44:39,351 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-06-12 19:44:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:39,351 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-06-12 19:44:39,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-06-12 19:44:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:39,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:39,357 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:39,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21522 [2021-06-12 19:44:39,558 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-06-12 19:44:39,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:39,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716094576] [2021-06-12 19:44:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:39,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:39,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716094576] [2021-06-12 19:44:39,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716094576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:39,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972869564] [2021-06-12 19:44:39,610 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:39,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972869564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:39,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:39,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560839866] [2021-06-12 19:44:39,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:39,669 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:39,878 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-06-12 19:44:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:44:39,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:39,914 INFO L225 Difference]: With dead ends: 19868 [2021-06-12 19:44:39,914 INFO L226 Difference]: Without dead ends: 19864 [2021-06-12 19:44:39,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-06-12 19:44:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-06-12 19:44:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-06-12 19:44:40,353 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-06-12 19:44:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:40,353 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-06-12 19:44:40,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-06-12 19:44:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:40,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:40,359 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:40,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21523 [2021-06-12 19:44:40,559 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-06-12 19:44:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:40,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505071368] [2021-06-12 19:44:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:40,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:40,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505071368] [2021-06-12 19:44:40,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505071368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:40,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598633678] [2021-06-12 19:44:40,615 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:40,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:40,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:40,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:40,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:40,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598633678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161892347] [2021-06-12 19:44:40,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:40,669 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:40,867 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-06-12 19:44:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:44:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:40,898 INFO L225 Difference]: With dead ends: 18321 [2021-06-12 19:44:40,898 INFO L226 Difference]: Without dead ends: 18320 [2021-06-12 19:44:40,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-06-12 19:44:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-06-12 19:44:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-06-12 19:44:41,299 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-06-12 19:44:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:41,299 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-06-12 19:44:41,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-06-12 19:44:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:41,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:41,305 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:41,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-06-12 19:44:41,506 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-06-12 19:44:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:41,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572901257] [2021-06-12 19:44:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:41,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:41,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572901257] [2021-06-12 19:44:41,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572901257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:41,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018771122] [2021-06-12 19:44:41,559 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:41,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:41,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:41,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:41,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018771122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:41,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:41,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108931724] [2021-06-12 19:44:41,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:41,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:41,618 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:41,734 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-06-12 19:44:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:44:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:41,768 INFO L225 Difference]: With dead ends: 18502 [2021-06-12 19:44:41,768 INFO L226 Difference]: Without dead ends: 18502 [2021-06-12 19:44:41,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-06-12 19:44:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-06-12 19:44:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-06-12 19:44:42,208 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-06-12 19:44:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:42,208 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-06-12 19:44:42,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-06-12 19:44:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:42,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:42,214 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:42,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21525,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:42,414 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-06-12 19:44:42,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:42,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616274132] [2021-06-12 19:44:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:42,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:42,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616274132] [2021-06-12 19:44:42,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616274132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565818085] [2021-06-12 19:44:42,471 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:42,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:42,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565818085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:42,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:44:42,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416002369] [2021-06-12 19:44:42,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:42,529 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:42,744 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-06-12 19:44:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:44:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:42,778 INFO L225 Difference]: With dead ends: 18306 [2021-06-12 19:44:42,778 INFO L226 Difference]: Without dead ends: 18304 [2021-06-12 19:44:42,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:44:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-06-12 19:44:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-06-12 19:44:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-06-12 19:44:43,191 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-06-12 19:44:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:43,191 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-06-12 19:44:43,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-06-12 19:44:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:43,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:43,197 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:43,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:43,397 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-06-12 19:44:43,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:43,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592659227] [2021-06-12 19:44:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:43,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592659227] [2021-06-12 19:44:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592659227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609062501] [2021-06-12 19:44:43,455 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:43,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:43,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609062501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:43,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:43,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:44:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852205194] [2021-06-12 19:44:43,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:44:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:44:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:43,522 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:43,640 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-06-12 19:44:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:43,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:43,672 INFO L225 Difference]: With dead ends: 18305 [2021-06-12 19:44:43,672 INFO L226 Difference]: Without dead ends: 18305 [2021-06-12 19:44:43,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-06-12 19:44:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-06-12 19:44:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-06-12 19:44:44,052 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-06-12 19:44:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:44,052 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-06-12 19:44:44,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-06-12 19:44:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:44,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:44,058 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:44,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21527,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:44,258 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-06-12 19:44:44,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:44,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584741191] [2021-06-12 19:44:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:44,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:44,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584741191] [2021-06-12 19:44:44,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584741191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:44,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490701631] [2021-06-12 19:44:44,322 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:44,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:44:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:44,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490701631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:44,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:44,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:44,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632343079] [2021-06-12 19:44:44,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:44,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:44,383 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:44,694 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-06-12 19:44:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:44:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:44,717 INFO L225 Difference]: With dead ends: 17705 [2021-06-12 19:44:44,718 INFO L226 Difference]: Without dead ends: 17702 [2021-06-12 19:44:44,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:44:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-06-12 19:44:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-06-12 19:44:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-06-12 19:44:44,971 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-06-12 19:44:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:44,972 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-06-12 19:44:44,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-06-12 19:44:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:44,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:44,977 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:45,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21528,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:45,177 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-06-12 19:44:45,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:45,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384999770] [2021-06-12 19:44:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:45,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:45,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384999770] [2021-06-12 19:44:45,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384999770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:45,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113385079] [2021-06-12 19:44:45,237 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:45,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113385079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:45,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:45,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737724883] [2021-06-12 19:44:45,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:45,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:45,300 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:45,545 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-06-12 19:44:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:44:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:45,573 INFO L225 Difference]: With dead ends: 18492 [2021-06-12 19:44:45,573 INFO L226 Difference]: Without dead ends: 18492 [2021-06-12 19:44:45,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-06-12 19:44:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-06-12 19:44:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-06-12 19:44:45,844 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-06-12 19:44:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:45,844 INFO L482 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-06-12 19:44:45,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-06-12 19:44:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:45,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:45,850 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:46,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21529,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:46,050 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-06-12 19:44:46,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:46,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579020625] [2021-06-12 19:44:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579020625] [2021-06-12 19:44:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579020625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036739427] [2021-06-12 19:44:46,161 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:46,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:46,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036739427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:46,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:46,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700461664] [2021-06-12 19:44:46,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:46,222 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:46,516 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-06-12 19:44:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:44:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:46,548 INFO L225 Difference]: With dead ends: 18165 [2021-06-12 19:44:46,548 INFO L226 Difference]: Without dead ends: 18161 [2021-06-12 19:44:46,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-06-12 19:44:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-06-12 19:44:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-06-12 19:44:46,855 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-06-12 19:44:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:46,856 INFO L482 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-06-12 19:44:46,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-06-12 19:44:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:46,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:46,861 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:47,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21530,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:47,062 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:47,062 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-06-12 19:44:47,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:47,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762165385] [2021-06-12 19:44:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:47,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:47,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762165385] [2021-06-12 19:44:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762165385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:47,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41748688] [2021-06-12 19:44:47,122 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:47,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:44:47,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:47,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41748688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:47,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:47,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:47,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246625119] [2021-06-12 19:44:47,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:47,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:47,283 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:47,450 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-06-12 19:44:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:44:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:47,495 INFO L225 Difference]: With dead ends: 23520 [2021-06-12 19:44:47,495 INFO L226 Difference]: Without dead ends: 23520 [2021-06-12 19:44:47,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-06-12 19:44:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-06-12 19:44:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-06-12 19:44:47,879 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-06-12 19:44:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:47,879 INFO L482 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-06-12 19:44:47,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-06-12 19:44:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:47,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:47,886 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:48,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21531 [2021-06-12 19:44:48,089 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-06-12 19:44:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:48,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941733499] [2021-06-12 19:44:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:48,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:48,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941733499] [2021-06-12 19:44:48,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941733499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:48,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358628099] [2021-06-12 19:44:48,155 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:48,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:48,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:48,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358628099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:48,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:48,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:48,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332238572] [2021-06-12 19:44:48,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:48,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:48,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:48,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:48,321 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:48,561 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-06-12 19:44:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:44:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:48,601 INFO L225 Difference]: With dead ends: 19410 [2021-06-12 19:44:48,601 INFO L226 Difference]: Without dead ends: 19405 [2021-06-12 19:44:48,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-06-12 19:44:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-06-12 19:44:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-06-12 19:44:48,938 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-06-12 19:44:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:48,938 INFO L482 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-06-12 19:44:48,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-06-12 19:44:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:48,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:48,944 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:49,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21532 [2021-06-12 19:44:49,145 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-06-12 19:44:49,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:49,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050646874] [2021-06-12 19:44:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:49,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:49,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050646874] [2021-06-12 19:44:49,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050646874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:49,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090289458] [2021-06-12 19:44:49,207 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:49,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:44:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:49,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090289458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:49,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:49,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965612006] [2021-06-12 19:44:49,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:49,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:49,272 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:49,513 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-06-12 19:44:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:49,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:49,560 INFO L225 Difference]: With dead ends: 20745 [2021-06-12 19:44:49,560 INFO L226 Difference]: Without dead ends: 20745 [2021-06-12 19:44:49,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:44:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-06-12 19:44:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-06-12 19:44:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-06-12 19:44:49,915 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-06-12 19:44:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:49,915 INFO L482 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-06-12 19:44:49,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-06-12 19:44:49,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:49,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:49,920 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:50,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21533 [2021-06-12 19:44:50,121 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-06-12 19:44:50,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:50,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039236429] [2021-06-12 19:44:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:50,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:50,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039236429] [2021-06-12 19:44:50,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039236429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444979192] [2021-06-12 19:44:50,194 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:50,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:50,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:50,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:50,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444979192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:50,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954619602] [2021-06-12 19:44:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:50,256 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:50,537 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-06-12 19:44:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:44:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:50,578 INFO L225 Difference]: With dead ends: 20239 [2021-06-12 19:44:50,578 INFO L226 Difference]: Without dead ends: 20233 [2021-06-12 19:44:50,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-06-12 19:44:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-06-12 19:44:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-06-12 19:44:50,977 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-06-12 19:44:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:50,977 INFO L482 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-06-12 19:44:50,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-06-12 19:44:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:50,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:50,983 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:51,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21534 [2021-06-12 19:44:51,184 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-06-12 19:44:51,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:51,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276109273] [2021-06-12 19:44:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:51,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276109273] [2021-06-12 19:44:51,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276109273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726378380] [2021-06-12 19:44:51,249 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726378380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:51,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492840021] [2021-06-12 19:44:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:51,314 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:51,560 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-06-12 19:44:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:51,599 INFO L225 Difference]: With dead ends: 20573 [2021-06-12 19:44:51,599 INFO L226 Difference]: Without dead ends: 20573 [2021-06-12 19:44:51,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:44:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-06-12 19:44:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-06-12 19:44:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-06-12 19:44:52,057 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-06-12 19:44:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:52,057 INFO L482 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-06-12 19:44:52,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-06-12 19:44:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:52,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:52,064 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:52,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21535 [2021-06-12 19:44:52,277 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-06-12 19:44:52,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:52,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112771005] [2021-06-12 19:44:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112771005] [2021-06-12 19:44:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112771005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664443686] [2021-06-12 19:44:52,352 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:52,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664443686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:52,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:52,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041252488] [2021-06-12 19:44:52,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:52,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:52,429 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:52,685 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-06-12 19:44:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:52,719 INFO L225 Difference]: With dead ends: 20348 [2021-06-12 19:44:52,719 INFO L226 Difference]: Without dead ends: 20341 [2021-06-12 19:44:52,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-06-12 19:44:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-06-12 19:44:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-06-12 19:44:53,049 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-06-12 19:44:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:53,049 INFO L482 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-06-12 19:44:53,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-06-12 19:44:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:53,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:53,055 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:53,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21536,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:53,256 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-06-12 19:44:53,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:53,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827170478] [2021-06-12 19:44:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:53,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:53,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827170478] [2021-06-12 19:44:53,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827170478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:53,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648548690] [2021-06-12 19:44:53,326 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:53,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:53,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648548690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:53,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:53,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:44:53,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015666765] [2021-06-12 19:44:53,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:44:53,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:44:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:53,520 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:53,880 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-06-12 19:44:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:44:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:53,920 INFO L225 Difference]: With dead ends: 21105 [2021-06-12 19:44:53,920 INFO L226 Difference]: Without dead ends: 21105 [2021-06-12 19:44:53,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:44:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-06-12 19:44:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-06-12 19:44:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-06-12 19:44:54,257 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-06-12 19:44:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:54,257 INFO L482 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-06-12 19:44:54,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-06-12 19:44:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:54,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:54,262 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:54,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21537,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:54,463 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-06-12 19:44:54,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:54,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050083041] [2021-06-12 19:44:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:54,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:54,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050083041] [2021-06-12 19:44:54,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050083041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:54,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629677100] [2021-06-12 19:44:54,520 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:54,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:54,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:54,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:54,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629677100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:54,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:54,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827834590] [2021-06-12 19:44:54,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:54,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:54,601 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:54,754 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-06-12 19:44:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:44:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:54,790 INFO L225 Difference]: With dead ends: 20897 [2021-06-12 19:44:54,790 INFO L226 Difference]: Without dead ends: 20897 [2021-06-12 19:44:54,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-06-12 19:44:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-06-12 19:44:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-06-12 19:44:55,248 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-06-12 19:44:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:55,248 INFO L482 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-06-12 19:44:55,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-06-12 19:44:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:55,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:55,254 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:55,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21538,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:55,454 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-06-12 19:44:55,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:55,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652137489] [2021-06-12 19:44:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:55,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652137489] [2021-06-12 19:44:55,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652137489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375427024] [2021-06-12 19:44:55,499 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:55,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:55,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375427024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:55,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:55,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560259751] [2021-06-12 19:44:55,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:55,556 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:55,791 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-06-12 19:44:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:55,841 INFO L225 Difference]: With dead ends: 25212 [2021-06-12 19:44:55,841 INFO L226 Difference]: Without dead ends: 25208 [2021-06-12 19:44:55,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-06-12 19:44:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-06-12 19:44:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-06-12 19:44:56,401 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-06-12 19:44:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:56,401 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-06-12 19:44:56,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-06-12 19:44:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:56,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:56,408 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:56,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21539,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:56,613 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-06-12 19:44:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:56,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882644566] [2021-06-12 19:44:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:56,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:56,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882644566] [2021-06-12 19:44:56,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882644566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:56,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799603969] [2021-06-12 19:44:56,665 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:56,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:44:56,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:56,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:56,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799603969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:56,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:56,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:56,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712325743] [2021-06-12 19:44:56,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:56,721 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:56,934 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-06-12 19:44:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:56,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:44:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:56,980 INFO L225 Difference]: With dead ends: 23865 [2021-06-12 19:44:56,980 INFO L226 Difference]: Without dead ends: 23861 [2021-06-12 19:44:56,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-06-12 19:44:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-06-12 19:44:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-06-12 19:44:57,559 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-06-12 19:44:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:57,559 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-06-12 19:44:57,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-06-12 19:44:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:57,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:57,565 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:57,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21540 [2021-06-12 19:44:57,766 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-06-12 19:44:57,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:57,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065216407] [2021-06-12 19:44:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:57,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065216407] [2021-06-12 19:44:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065216407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144401367] [2021-06-12 19:44:57,815 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:57,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144401367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:57,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:57,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:57,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860902391] [2021-06-12 19:44:57,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:57,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:57,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:57,873 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:58,079 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-06-12 19:44:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:44:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:58,355 INFO L225 Difference]: With dead ends: 26766 [2021-06-12 19:44:58,355 INFO L226 Difference]: Without dead ends: 26766 [2021-06-12 19:44:58,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-06-12 19:44:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-06-12 19:44:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-06-12 19:44:58,930 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-06-12 19:44:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:58,930 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-06-12 19:44:58,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:44:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-06-12 19:44:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:44:58,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:58,937 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:59,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21541 [2021-06-12 19:44:59,138 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-06-12 19:44:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:59,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057276339] [2021-06-12 19:44:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:59,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057276339] [2021-06-12 19:44:59,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057276339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468634077] [2021-06-12 19:44:59,219 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:59,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:59,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:59,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:44:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:59,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468634077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:59,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:59,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:44:59,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337550188] [2021-06-12 19:44:59,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:59,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:59,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:59,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:59,282 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:59,563 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-06-12 19:44:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:44:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:59,625 INFO L225 Difference]: With dead ends: 26395 [2021-06-12 19:44:59,625 INFO L226 Difference]: Without dead ends: 26391 [2021-06-12 19:44:59,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-12 19:45:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-06-12 19:45:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-06-12 19:45:00,303 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-06-12 19:45:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:00,303 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-06-12 19:45:00,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-06-12 19:45:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:00,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:00,310 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:00,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21542 [2021-06-12 19:45:00,510 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-06-12 19:45:00,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:00,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806903621] [2021-06-12 19:45:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:00,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806903621] [2021-06-12 19:45:00,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806903621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474931861] [2021-06-12 19:45:00,563 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:00,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:45:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:00,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474931861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:00,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:00,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20233333] [2021-06-12 19:45:00,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:00,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:00,624 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:00,838 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-06-12 19:45:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:00,893 INFO L225 Difference]: With dead ends: 28931 [2021-06-12 19:45:00,893 INFO L226 Difference]: Without dead ends: 28931 [2021-06-12 19:45:00,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:45:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-06-12 19:45:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-06-12 19:45:01,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-06-12 19:45:01,645 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-06-12 19:45:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:01,645 INFO L482 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-06-12 19:45:01,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-06-12 19:45:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:01,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:01,652 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:01,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21543 [2021-06-12 19:45:01,853 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:01,854 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-06-12 19:45:01,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:01,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938018312] [2021-06-12 19:45:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:01,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:01,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938018312] [2021-06-12 19:45:01,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938018312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:01,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517924115] [2021-06-12 19:45:01,918 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:01,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:01,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:01,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517924115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:01,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:01,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974888850] [2021-06-12 19:45:01,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:01,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:01,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:01,989 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:02,245 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-06-12 19:45:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:45:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:02,300 INFO L225 Difference]: With dead ends: 25641 [2021-06-12 19:45:02,300 INFO L226 Difference]: Without dead ends: 25636 [2021-06-12 19:45:02,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:45:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-06-12 19:45:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-06-12 19:45:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-06-12 19:45:02,910 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-06-12 19:45:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:02,910 INFO L482 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-06-12 19:45:02,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-06-12 19:45:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:02,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:02,918 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:03,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21544 [2021-06-12 19:45:03,119 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-06-12 19:45:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:03,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703273814] [2021-06-12 19:45:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:03,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:03,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703273814] [2021-06-12 19:45:03,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703273814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:03,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940352639] [2021-06-12 19:45:03,175 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:03,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:03,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:03,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:03,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940352639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:03,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:03,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:03,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19194781] [2021-06-12 19:45:03,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:03,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:03,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:03,249 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:03,666 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-06-12 19:45:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:03,728 INFO L225 Difference]: With dead ends: 28403 [2021-06-12 19:45:03,729 INFO L226 Difference]: Without dead ends: 28403 [2021-06-12 19:45:03,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-06-12 19:45:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-06-12 19:45:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-06-12 19:45:04,380 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-06-12 19:45:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:04,380 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-06-12 19:45:04,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-06-12 19:45:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:04,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:04,388 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:04,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21545 [2021-06-12 19:45:04,588 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-06-12 19:45:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544570840] [2021-06-12 19:45:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:04,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:04,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544570840] [2021-06-12 19:45:04,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544570840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:04,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878772962] [2021-06-12 19:45:04,649 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:04,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:45:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:04,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878772962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:04,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:04,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:04,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934642958] [2021-06-12 19:45:04,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:04,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:04,705 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:04,954 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-06-12 19:45:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:05,019 INFO L225 Difference]: With dead ends: 28254 [2021-06-12 19:45:05,019 INFO L226 Difference]: Without dead ends: 28250 [2021-06-12 19:45:05,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:45:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-06-12 19:45:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-06-12 19:45:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-06-12 19:45:05,671 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-06-12 19:45:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:05,671 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-06-12 19:45:05,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-06-12 19:45:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:05,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:05,680 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:05,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21546,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:05,893 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-06-12 19:45:05,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:05,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413072319] [2021-06-12 19:45:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:05,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:05,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413072319] [2021-06-12 19:45:05,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413072319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:05,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593114667] [2021-06-12 19:45:05,953 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:05,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:06,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593114667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:06,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:06,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:06,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316461939] [2021-06-12 19:45:06,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:06,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:06,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:06,011 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:06,370 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-06-12 19:45:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:06,434 INFO L225 Difference]: With dead ends: 30857 [2021-06-12 19:45:06,434 INFO L226 Difference]: Without dead ends: 30857 [2021-06-12 19:45:06,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-06-12 19:45:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-06-12 19:45:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-06-12 19:45:07,031 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-06-12 19:45:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:07,031 INFO L482 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-06-12 19:45:07,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-06-12 19:45:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:07,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:07,038 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:07,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21547 [2021-06-12 19:45:07,239 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-06-12 19:45:07,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:07,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148467952] [2021-06-12 19:45:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:07,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:07,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148467952] [2021-06-12 19:45:07,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148467952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:07,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431213861] [2021-06-12 19:45:07,303 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:07,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:07,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431213861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:07,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:07,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:07,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039181995] [2021-06-12 19:45:07,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:07,371 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:07,630 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-06-12 19:45:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:07,677 INFO L225 Difference]: With dead ends: 23497 [2021-06-12 19:45:07,678 INFO L226 Difference]: Without dead ends: 23492 [2021-06-12 19:45:07,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-06-12 19:45:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-06-12 19:45:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-06-12 19:45:08,205 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-06-12 19:45:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:08,205 INFO L482 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-06-12 19:45:08,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-06-12 19:45:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:08,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:08,212 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:08,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21548,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:08,412 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:08,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-06-12 19:45:08,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:08,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922654726] [2021-06-12 19:45:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:08,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922654726] [2021-06-12 19:45:08,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922654726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041109436] [2021-06-12 19:45:08,476 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:08,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041109436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:08,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274948260] [2021-06-12 19:45:08,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:08,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:08,535 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:08,941 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-06-12 19:45:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:45:08,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:09,007 INFO L225 Difference]: With dead ends: 26246 [2021-06-12 19:45:09,008 INFO L226 Difference]: Without dead ends: 26246 [2021-06-12 19:45:09,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:45:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-06-12 19:45:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-06-12 19:45:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-06-12 19:45:09,575 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-06-12 19:45:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:09,575 INFO L482 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-06-12 19:45:09,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-06-12 19:45:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:09,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:09,581 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:09,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21549,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:09,782 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-06-12 19:45:09,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:09,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646371489] [2021-06-12 19:45:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:09,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:09,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646371489] [2021-06-12 19:45:09,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646371489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:09,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936617560] [2021-06-12 19:45:09,864 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:09,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:09,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:09,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:09,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936617560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:09,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:09,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954755714] [2021-06-12 19:45:09,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:09,927 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:10,212 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-06-12 19:45:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:10,258 INFO L225 Difference]: With dead ends: 23615 [2021-06-12 19:45:10,258 INFO L226 Difference]: Without dead ends: 23609 [2021-06-12 19:45:10,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-06-12 19:45:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-06-12 19:45:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-06-12 19:45:10,754 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-06-12 19:45:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:10,754 INFO L482 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-06-12 19:45:10,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-06-12 19:45:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:10,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:10,760 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:10,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21550,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:10,961 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-06-12 19:45:10,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:10,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906793325] [2021-06-12 19:45:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:11,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:11,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906793325] [2021-06-12 19:45:11,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906793325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:11,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318041886] [2021-06-12 19:45:11,032 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:11,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:11,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318041886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:11,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:11,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665491873] [2021-06-12 19:45:11,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:11,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:11,097 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:11,425 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-06-12 19:45:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:45:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:11,482 INFO L225 Difference]: With dead ends: 24953 [2021-06-12 19:45:11,482 INFO L226 Difference]: Without dead ends: 24953 [2021-06-12 19:45:11,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:45:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-06-12 19:45:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-06-12 19:45:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-06-12 19:45:12,045 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-06-12 19:45:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:12,045 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-06-12 19:45:12,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-06-12 19:45:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:12,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:12,052 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:12,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21551,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:12,253 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-06-12 19:45:12,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:12,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680665270] [2021-06-12 19:45:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:12,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:12,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680665270] [2021-06-12 19:45:12,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680665270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:12,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921744461] [2021-06-12 19:45:12,322 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:12,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:45:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:12,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921744461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:12,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:12,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:12,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990398263] [2021-06-12 19:45:12,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:12,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:12,539 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:12,838 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-06-12 19:45:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:12,891 INFO L225 Difference]: With dead ends: 24826 [2021-06-12 19:45:12,891 INFO L226 Difference]: Without dead ends: 24822 [2021-06-12 19:45:12,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-06-12 19:45:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-06-12 19:45:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-06-12 19:45:13,417 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-06-12 19:45:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:13,418 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-06-12 19:45:13,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-06-12 19:45:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:13,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:13,424 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:13,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21552 [2021-06-12 19:45:13,625 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:13,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-06-12 19:45:13,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:13,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240858726] [2021-06-12 19:45:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:13,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:13,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240858726] [2021-06-12 19:45:13,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240858726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:13,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619502380] [2021-06-12 19:45:13,689 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:13,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619502380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:13,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:13,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:13,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519465409] [2021-06-12 19:45:13,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:13,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:13,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:13,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:13,755 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:13,967 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-06-12 19:45:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:13,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:14,019 INFO L225 Difference]: With dead ends: 25900 [2021-06-12 19:45:14,020 INFO L226 Difference]: Without dead ends: 25900 [2021-06-12 19:45:14,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-12 19:45:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-06-12 19:45:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-06-12 19:45:14,506 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-06-12 19:45:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:14,506 INFO L482 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-06-12 19:45:14,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-06-12 19:45:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:14,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:14,513 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:14,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21553,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:14,717 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-06-12 19:45:14,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:14,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191973813] [2021-06-12 19:45:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:14,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191973813] [2021-06-12 19:45:14,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191973813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746606771] [2021-06-12 19:45:14,790 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:14,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746606771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:14,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:14,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:14,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383869114] [2021-06-12 19:45:14,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:14,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:14,852 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:15,299 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-06-12 19:45:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:45:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:15,330 INFO L225 Difference]: With dead ends: 19111 [2021-06-12 19:45:15,330 INFO L226 Difference]: Without dead ends: 19106 [2021-06-12 19:45:15,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:45:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-06-12 19:45:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-06-12 19:45:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-06-12 19:45:15,656 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-06-12 19:45:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:15,656 INFO L482 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-06-12 19:45:15,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-06-12 19:45:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:15,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:15,664 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:15,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21554 [2021-06-12 19:45:15,881 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-06-12 19:45:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:15,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450951473] [2021-06-12 19:45:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:15,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:15,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450951473] [2021-06-12 19:45:15,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450951473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:15,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248443483] [2021-06-12 19:45:15,943 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:15,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:15,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:15,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:16,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248443483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:16,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:16,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:16,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778788579] [2021-06-12 19:45:16,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:16,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:16,019 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:16,312 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-06-12 19:45:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:16,354 INFO L225 Difference]: With dead ends: 22104 [2021-06-12 19:45:16,354 INFO L226 Difference]: Without dead ends: 22104 [2021-06-12 19:45:16,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:45:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-06-12 19:45:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-06-12 19:45:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-06-12 19:45:16,687 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-06-12 19:45:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-06-12 19:45:16,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-06-12 19:45:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:16,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:16,693 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:16,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21555 [2021-06-12 19:45:16,894 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-06-12 19:45:16,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:16,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899954781] [2021-06-12 19:45:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:17,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:17,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899954781] [2021-06-12 19:45:17,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899954781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:17,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719682167] [2021-06-12 19:45:17,057 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:17,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:17,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:17,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719682167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:17,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:17,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842585980] [2021-06-12 19:45:17,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:17,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:17,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:17,121 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:17,373 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-06-12 19:45:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:17,402 INFO L225 Difference]: With dead ends: 18689 [2021-06-12 19:45:17,402 INFO L226 Difference]: Without dead ends: 18683 [2021-06-12 19:45:17,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:45:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-06-12 19:45:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-06-12 19:45:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-06-12 19:45:17,835 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-06-12 19:45:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:17,835 INFO L482 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-06-12 19:45:17,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-06-12 19:45:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:17,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:17,842 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:18,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21556,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:18,042 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-06-12 19:45:18,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:18,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56516931] [2021-06-12 19:45:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:18,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56516931] [2021-06-12 19:45:18,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56516931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857878595] [2021-06-12 19:45:18,105 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:18,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:18,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:18,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857878595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:18,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:18,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:18,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504164630] [2021-06-12 19:45:18,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:18,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:18,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:18,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:18,171 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:18,423 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-06-12 19:45:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:18,457 INFO L225 Difference]: With dead ends: 19170 [2021-06-12 19:45:18,457 INFO L226 Difference]: Without dead ends: 19170 [2021-06-12 19:45:18,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:45:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-06-12 19:45:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-06-12 19:45:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-06-12 19:45:18,907 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-06-12 19:45:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:18,907 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-06-12 19:45:18,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-06-12 19:45:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:18,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:18,912 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:19,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21557 [2021-06-12 19:45:19,113 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-06-12 19:45:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:19,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712885160] [2021-06-12 19:45:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:19,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712885160] [2021-06-12 19:45:19,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712885160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954113873] [2021-06-12 19:45:19,185 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:19,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:45:19,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:19,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:19,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954113873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:19,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:19,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:19,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074441113] [2021-06-12 19:45:19,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:19,246 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:19,497 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-06-12 19:45:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:19,527 INFO L225 Difference]: With dead ends: 18240 [2021-06-12 19:45:19,527 INFO L226 Difference]: Without dead ends: 18233 [2021-06-12 19:45:19,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:45:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-06-12 19:45:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-06-12 19:45:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-06-12 19:45:19,961 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-06-12 19:45:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:19,961 INFO L482 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-06-12 19:45:19,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-06-12 19:45:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:19,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:19,966 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:20,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21558,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:20,167 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:20,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-06-12 19:45:20,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:20,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825393964] [2021-06-12 19:45:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:20,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825393964] [2021-06-12 19:45:20,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825393964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135214620] [2021-06-12 19:45:20,247 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:20,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135214620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683776147] [2021-06-12 19:45:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:20,312 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:20,671 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-06-12 19:45:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:45:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:20,703 INFO L225 Difference]: With dead ends: 18422 [2021-06-12 19:45:20,704 INFO L226 Difference]: Without dead ends: 18422 [2021-06-12 19:45:20,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:45:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-06-12 19:45:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-06-12 19:45:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-06-12 19:45:21,098 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-06-12 19:45:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:21,098 INFO L482 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-06-12 19:45:21,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-06-12 19:45:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:21,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:21,104 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:21,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21559,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:21,305 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-06-12 19:45:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:21,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491246342] [2021-06-12 19:45:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:21,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:21,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491246342] [2021-06-12 19:45:21,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491246342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:21,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754206822] [2021-06-12 19:45:21,397 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:21,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:21,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:21,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754206822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:21,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:21,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:21,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269402115] [2021-06-12 19:45:21,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:21,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:21,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:21,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:21,466 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:21,595 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-06-12 19:45:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:45:21,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:21,627 INFO L225 Difference]: With dead ends: 17724 [2021-06-12 19:45:21,627 INFO L226 Difference]: Without dead ends: 17724 [2021-06-12 19:45:21,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:45:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-12 19:45:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-06-12 19:45:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-06-12 19:45:22,094 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-06-12 19:45:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:22,094 INFO L482 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-06-12 19:45:22,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-06-12 19:45:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:22,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:22,101 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:22,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21560,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:22,301 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:22,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-06-12 19:45:22,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:22,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212276139] [2021-06-12 19:45:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:22,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:22,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212276139] [2021-06-12 19:45:22,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212276139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:22,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250625448] [2021-06-12 19:45:22,356 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:22,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:22,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:22,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250625448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:22,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:22,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:22,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732904658] [2021-06-12 19:45:22,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:22,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:22,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:22,414 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:22,621 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-06-12 19:45:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:22,653 INFO L225 Difference]: With dead ends: 17701 [2021-06-12 19:45:22,653 INFO L226 Difference]: Without dead ends: 17697 [2021-06-12 19:45:22,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-06-12 19:45:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-06-12 19:45:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-06-12 19:45:22,952 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-06-12 19:45:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:22,952 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-06-12 19:45:22,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-06-12 19:45:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:23,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:23,090 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:23,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21561 [2021-06-12 19:45:23,291 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-06-12 19:45:23,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:23,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439982720] [2021-06-12 19:45:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:23,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:23,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439982720] [2021-06-12 19:45:23,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439982720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:23,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372645814] [2021-06-12 19:45:23,361 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:23,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:23,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:23,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372645814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:23,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:23,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:23,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336450964] [2021-06-12 19:45:23,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:23,422 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:23,628 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-06-12 19:45:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:23,661 INFO L225 Difference]: With dead ends: 17251 [2021-06-12 19:45:23,661 INFO L226 Difference]: Without dead ends: 17250 [2021-06-12 19:45:23,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-12 19:45:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-06-12 19:45:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-06-12 19:45:23,960 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-06-12 19:45:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:23,960 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-06-12 19:45:23,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-06-12 19:45:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:23,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:23,966 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:24,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21562 [2021-06-12 19:45:24,166 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:24,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:24,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-06-12 19:45:24,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:24,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781089275] [2021-06-12 19:45:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:24,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:24,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781089275] [2021-06-12 19:45:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781089275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:24,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831238963] [2021-06-12 19:45:24,366 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:24,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:24,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:24,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:24,663 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 19:45:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:24,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831238963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:24,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:24,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:24,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698687452] [2021-06-12 19:45:24,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:24,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:24,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:24,693 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:24,870 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-06-12 19:45:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:45:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:24,907 INFO L225 Difference]: With dead ends: 17351 [2021-06-12 19:45:24,908 INFO L226 Difference]: Without dead ends: 17351 [2021-06-12 19:45:24,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:45:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-06-12 19:45:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-06-12 19:45:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-06-12 19:45:25,227 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-06-12 19:45:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:25,227 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-06-12 19:45:25,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-06-12 19:45:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:25,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:25,233 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:25,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21563,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:25,434 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:25,434 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-06-12 19:45:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:25,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662208059] [2021-06-12 19:45:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:25,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:25,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662208059] [2021-06-12 19:45:25,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662208059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:25,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461849383] [2021-06-12 19:45:25,489 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:25,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:45:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:25,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:25,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461849383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:25,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:25,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:45:25,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764524976] [2021-06-12 19:45:25,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:25,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:25,551 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:25,830 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-06-12 19:45:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:25,858 INFO L225 Difference]: With dead ends: 17271 [2021-06-12 19:45:25,858 INFO L226 Difference]: Without dead ends: 17269 [2021-06-12 19:45:25,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:45:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-12 19:45:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-06-12 19:45:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-06-12 19:45:26,153 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-06-12 19:45:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:26,153 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-06-12 19:45:26,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-06-12 19:45:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:26,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:26,159 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:26,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21564 [2021-06-12 19:45:26,359 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:26,360 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-06-12 19:45:26,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:26,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798699222] [2021-06-12 19:45:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:26,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:26,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798699222] [2021-06-12 19:45:26,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798699222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:26,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904793520] [2021-06-12 19:45:26,439 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:26,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904793520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:26,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:26,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:45:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526453813] [2021-06-12 19:45:26,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:26,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:26,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:26,501 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:26,701 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-06-12 19:45:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:45:26,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:26,732 INFO L225 Difference]: With dead ends: 17397 [2021-06-12 19:45:26,732 INFO L226 Difference]: Without dead ends: 17397 [2021-06-12 19:45:26,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:45:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-06-12 19:45:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-06-12 19:45:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-06-12 19:45:26,983 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-06-12 19:45:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:26,983 INFO L482 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-06-12 19:45:26,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-06-12 19:45:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:26,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:26,989 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:27,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21565 [2021-06-12 19:45:27,190 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:27,190 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-06-12 19:45:27,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:27,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677003772] [2021-06-12 19:45:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:27,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:27,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677003772] [2021-06-12 19:45:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677003772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:27,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981061851] [2021-06-12 19:45:27,251 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:27,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:27,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981061851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:27,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:27,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:45:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885349154] [2021-06-12 19:45:27,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:27,319 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:27,506 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-06-12 19:45:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:27,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:27,541 INFO L225 Difference]: With dead ends: 19691 [2021-06-12 19:45:27,542 INFO L226 Difference]: Without dead ends: 19688 [2021-06-12 19:45:27,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:45:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-06-12 19:45:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-06-12 19:45:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-06-12 19:45:27,901 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-06-12 19:45:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:27,901 INFO L482 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-06-12 19:45:27,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-06-12 19:45:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:27,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:27,907 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:28,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-06-12 19:45:28,107 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-06-12 19:45:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:28,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147225580] [2021-06-12 19:45:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:28,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:28,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147225580] [2021-06-12 19:45:28,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147225580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:28,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281538731] [2021-06-12 19:45:28,165 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:28,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:45:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:28,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281538731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:28,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:28,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 19:45:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755177951] [2021-06-12 19:45:28,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:28,231 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:28,398 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-06-12 19:45:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:45:28,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:28,461 INFO L225 Difference]: With dead ends: 26038 [2021-06-12 19:45:28,461 INFO L226 Difference]: Without dead ends: 26038 [2021-06-12 19:45:28,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-06-12 19:45:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-06-12 19:45:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-06-12 19:45:29,002 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-06-12 19:45:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:29,002 INFO L482 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-06-12 19:45:29,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-06-12 19:45:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:29,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:29,008 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:29,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21567 [2021-06-12 19:45:29,209 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:29,209 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-06-12 19:45:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:29,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583505802] [2021-06-12 19:45:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:29,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:29,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583505802] [2021-06-12 19:45:29,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583505802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:29,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269495017] [2021-06-12 19:45:29,275 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:29,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:29,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269495017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:29,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:29,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:29,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402145295] [2021-06-12 19:45:29,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:29,339 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:29,581 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-06-12 19:45:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:45:29,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:29,654 INFO L225 Difference]: With dead ends: 28515 [2021-06-12 19:45:29,654 INFO L226 Difference]: Without dead ends: 28511 [2021-06-12 19:45:29,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:45:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-06-12 19:45:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-06-12 19:45:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-06-12 19:45:30,263 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-06-12 19:45:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:30,263 INFO L482 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-06-12 19:45:30,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-06-12 19:45:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:30,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:30,269 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:30,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21568 [2021-06-12 19:45:30,476 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-06-12 19:45:30,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:30,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499447330] [2021-06-12 19:45:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:30,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:30,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499447330] [2021-06-12 19:45:30,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499447330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:30,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417333332] [2021-06-12 19:45:30,537 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:30,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:45:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417333332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:30,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:30,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:30,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369217125] [2021-06-12 19:45:30,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:30,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:30,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:30,603 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:30,999 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-06-12 19:45:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:45:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:31,057 INFO L225 Difference]: With dead ends: 26560 [2021-06-12 19:45:31,057 INFO L226 Difference]: Without dead ends: 26560 [2021-06-12 19:45:31,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-06-12 19:45:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-06-12 19:45:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-06-12 19:45:31,659 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-06-12 19:45:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:31,659 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-06-12 19:45:31,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-06-12 19:45:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:31,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:31,666 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:31,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21569,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:31,866 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-06-12 19:45:31,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:31,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776364717] [2021-06-12 19:45:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:31,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776364717] [2021-06-12 19:45:31,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776364717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922452585] [2021-06-12 19:45:31,934 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:31,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:45:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922452585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:31,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:31,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809061047] [2021-06-12 19:45:31,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:31,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:31,995 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:32,229 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-06-12 19:45:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:32,286 INFO L225 Difference]: With dead ends: 26225 [2021-06-12 19:45:32,286 INFO L226 Difference]: Without dead ends: 26220 [2021-06-12 19:45:32,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:45:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-12 19:45:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-06-12 19:45:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-06-12 19:45:32,823 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-06-12 19:45:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:32,823 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-06-12 19:45:32,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-06-12 19:45:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:32,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:32,830 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:33,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21570,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:33,030 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:33,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-06-12 19:45:33,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:33,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852559134] [2021-06-12 19:45:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:33,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:33,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852559134] [2021-06-12 19:45:33,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852559134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:33,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151873880] [2021-06-12 19:45:33,094 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:33,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151873880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:33,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:33,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507887006] [2021-06-12 19:45:33,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:33,157 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:33,355 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-06-12 19:45:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:45:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:33,412 INFO L225 Difference]: With dead ends: 28702 [2021-06-12 19:45:33,412 INFO L226 Difference]: Without dead ends: 28702 [2021-06-12 19:45:33,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:45:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-06-12 19:45:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-06-12 19:45:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-06-12 19:45:34,187 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-06-12 19:45:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:34,187 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-06-12 19:45:34,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-06-12 19:45:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:34,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:34,193 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:34,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21571 [2021-06-12 19:45:34,394 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-06-12 19:45:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:34,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502657397] [2021-06-12 19:45:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:34,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:34,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502657397] [2021-06-12 19:45:34,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502657397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:34,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796592389] [2021-06-12 19:45:34,461 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:34,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:34,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796592389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:34,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:34,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672717065] [2021-06-12 19:45:34,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:34,526 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:34,735 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-06-12 19:45:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:34,789 INFO L225 Difference]: With dead ends: 28805 [2021-06-12 19:45:34,789 INFO L226 Difference]: Without dead ends: 28799 [2021-06-12 19:45:34,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:45:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-06-12 19:45:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-06-12 19:45:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-06-12 19:45:35,347 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-06-12 19:45:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:35,347 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-06-12 19:45:35,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-06-12 19:45:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:35,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:35,353 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:35,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21572 [2021-06-12 19:45:35,554 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-06-12 19:45:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:35,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18180016] [2021-06-12 19:45:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:35,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18180016] [2021-06-12 19:45:35,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18180016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699490135] [2021-06-12 19:45:35,627 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:35,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:35,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699490135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:35,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:35,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:35,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356115583] [2021-06-12 19:45:35,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:35,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:35,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:35,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:35,699 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:36,105 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-06-12 19:45:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:36,168 INFO L225 Difference]: With dead ends: 29601 [2021-06-12 19:45:36,168 INFO L226 Difference]: Without dead ends: 29601 [2021-06-12 19:45:36,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-06-12 19:45:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-06-12 19:45:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-06-12 19:45:36,812 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-06-12 19:45:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:36,813 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-06-12 19:45:36,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-06-12 19:45:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:36,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:36,823 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:37,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21573 [2021-06-12 19:45:37,045 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:37,046 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-06-12 19:45:37,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:37,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854925636] [2021-06-12 19:45:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:37,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:37,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854925636] [2021-06-12 19:45:37,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854925636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:37,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217256105] [2021-06-12 19:45:37,116 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:37,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:37,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:37,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217256105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:37,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:37,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:37,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426845064] [2021-06-12 19:45:37,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:37,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:37,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:37,178 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:37,411 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-06-12 19:45:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:37,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:37,473 INFO L225 Difference]: With dead ends: 29739 [2021-06-12 19:45:37,473 INFO L226 Difference]: Without dead ends: 29732 [2021-06-12 19:45:37,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:45:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-06-12 19:45:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-06-12 19:45:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-06-12 19:45:38,145 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-06-12 19:45:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:38,145 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-06-12 19:45:38,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-06-12 19:45:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:38,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:38,154 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:38,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21574 [2021-06-12 19:45:38,369 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-06-12 19:45:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:38,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655413409] [2021-06-12 19:45:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:38,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:38,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655413409] [2021-06-12 19:45:38,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655413409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:38,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223900162] [2021-06-12 19:45:38,456 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:38,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:38,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223900162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:38,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:38,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:38,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235584493] [2021-06-12 19:45:38,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:38,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:38,534 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:38,892 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 19:45:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:39,100 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-06-12 19:45:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:45:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:39,157 INFO L225 Difference]: With dead ends: 29939 [2021-06-12 19:45:39,158 INFO L226 Difference]: Without dead ends: 29939 [2021-06-12 19:45:39,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:45:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-06-12 19:45:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-06-12 19:45:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-06-12 19:45:39,750 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-06-12 19:45:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:39,750 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-06-12 19:45:39,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-06-12 19:45:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:39,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:39,758 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:39,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21575,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:39,959 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-06-12 19:45:39,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:39,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127136641] [2021-06-12 19:45:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:40,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:40,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127136641] [2021-06-12 19:45:40,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127136641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:40,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109153758] [2021-06-12 19:45:40,040 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:40,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:45:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:40,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109153758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:40,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:40,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:40,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714430210] [2021-06-12 19:45:40,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:40,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:40,107 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:40,353 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-06-12 19:45:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:40,417 INFO L225 Difference]: With dead ends: 29973 [2021-06-12 19:45:40,418 INFO L226 Difference]: Without dead ends: 29965 [2021-06-12 19:45:40,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:45:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-06-12 19:45:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-06-12 19:45:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-06-12 19:45:41,307 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-06-12 19:45:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:41,307 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-06-12 19:45:41,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-06-12 19:45:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:41,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:41,315 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:41,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21576 [2021-06-12 19:45:41,516 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-06-12 19:45:41,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:41,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020180813] [2021-06-12 19:45:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:41,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:41,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020180813] [2021-06-12 19:45:41,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020180813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:41,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505392549] [2021-06-12 19:45:41,591 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:41,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505392549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:41,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:41,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:41,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739156019] [2021-06-12 19:45:41,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:41,656 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:42,115 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-06-12 19:45:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:45:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:42,182 INFO L225 Difference]: With dead ends: 30267 [2021-06-12 19:45:42,182 INFO L226 Difference]: Without dead ends: 30267 [2021-06-12 19:45:42,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:45:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-06-12 19:45:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-06-12 19:45:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-06-12 19:45:42,803 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-06-12 19:45:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:42,803 INFO L482 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-06-12 19:45:42,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-06-12 19:45:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:42,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:42,811 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:43,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21577,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:43,012 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-06-12 19:45:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051847345] [2021-06-12 19:45:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:43,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:43,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051847345] [2021-06-12 19:45:43,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051847345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:43,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143704098] [2021-06-12 19:45:43,069 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:43,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:45:43,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143704098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:43,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:43,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:45:43,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122047045] [2021-06-12 19:45:43,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:43,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:43,134 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:45:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:43,451 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-06-12 19:45:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:45:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:45:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:43,509 INFO L225 Difference]: With dead ends: 30158 [2021-06-12 19:45:43,509 INFO L226 Difference]: Without dead ends: 30158 [2021-06-12 19:45:43,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:45:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-06-12 19:45:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-06-12 19:45:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-06-12 19:45:44,119 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-06-12 19:45:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:44,119 INFO L482 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-06-12 19:45:44,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:45:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-06-12 19:45:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:44,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:44,127 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:44,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21578 [2021-06-12 19:45:44,327 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-06-12 19:45:44,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:44,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149830383] [2021-06-12 19:45:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:44,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:44,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149830383] [2021-06-12 19:45:44,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149830383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:44,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049912063] [2021-06-12 19:45:44,376 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:44,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:44,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:45:44,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049912063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:44,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:44,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:45:44,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267892157] [2021-06-12 19:45:44,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:44,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:44,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:44,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:44,432 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:45:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:44,704 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-06-12 19:45:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-12 19:45:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:44,764 INFO L225 Difference]: With dead ends: 31233 [2021-06-12 19:45:44,764 INFO L226 Difference]: Without dead ends: 31229 [2021-06-12 19:45:44,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:45:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-06-12 19:45:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-06-12 19:45:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-06-12 19:45:45,580 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-06-12 19:45:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:45,581 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-06-12 19:45:45,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-06-12 19:45:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-06-12 19:45:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:45,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:45,588 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:45,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:45,789 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-06-12 19:45:45,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:45,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285888879] [2021-06-12 19:45:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:45,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:45,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285888879] [2021-06-12 19:45:45,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285888879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:45,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113975054] [2021-06-12 19:45:45,848 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:45,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:45,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:45,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:45,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113975054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:45,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:45,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:45,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526921504] [2021-06-12 19:45:45,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:45,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:45,902 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:46,127 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-06-12 19:45:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:46,184 INFO L225 Difference]: With dead ends: 28956 [2021-06-12 19:45:46,185 INFO L226 Difference]: Without dead ends: 28951 [2021-06-12 19:45:46,185 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-12 19:45:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-06-12 19:45:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-06-12 19:45:46,803 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-06-12 19:45:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:46,803 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-06-12 19:45:46,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-06-12 19:45:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:46,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:46,813 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:47,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21580 [2021-06-12 19:45:47,037 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-06-12 19:45:47,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:47,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343544418] [2021-06-12 19:45:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:47,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343544418] [2021-06-12 19:45:47,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343544418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286390999] [2021-06-12 19:45:47,108 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:47,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:47,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:47,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286390999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:47,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:47,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:45:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127733470] [2021-06-12 19:45:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:47,176 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:47,639 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-06-12 19:45:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:47,712 INFO L225 Difference]: With dead ends: 34766 [2021-06-12 19:45:47,712 INFO L226 Difference]: Without dead ends: 34766 [2021-06-12 19:45:47,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-06-12 19:45:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-06-12 19:45:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-06-12 19:45:48,392 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-06-12 19:45:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:48,392 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-06-12 19:45:48,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-06-12 19:45:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:48,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:48,401 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:48,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21581 [2021-06-12 19:45:48,601 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-06-12 19:45:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:48,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097838460] [2021-06-12 19:45:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:48,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:48,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097838460] [2021-06-12 19:45:48,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097838460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:48,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326215554] [2021-06-12 19:45:48,664 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:48,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:45:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326215554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:48,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:48,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:48,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162716447] [2021-06-12 19:45:48,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:48,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:48,721 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:48,992 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-06-12 19:45:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:45:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:49,063 INFO L225 Difference]: With dead ends: 33998 [2021-06-12 19:45:49,064 INFO L226 Difference]: Without dead ends: 33993 [2021-06-12 19:45:49,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:45:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-06-12 19:45:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-06-12 19:45:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-06-12 19:45:49,938 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-06-12 19:45:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:49,938 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-06-12 19:45:49,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-06-12 19:45:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:49,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:49,946 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:50,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21582,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:50,147 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-06-12 19:45:50,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:50,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157602611] [2021-06-12 19:45:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:50,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:50,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157602611] [2021-06-12 19:45:50,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157602611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:50,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902705162] [2021-06-12 19:45:50,206 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:50,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902705162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:50,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:50,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:50,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221945089] [2021-06-12 19:45:50,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:50,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:50,267 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:50,634 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-06-12 19:45:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:50,716 INFO L225 Difference]: With dead ends: 40272 [2021-06-12 19:45:50,716 INFO L226 Difference]: Without dead ends: 40272 [2021-06-12 19:45:50,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:45:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-06-12 19:45:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-06-12 19:45:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-06-12 19:45:51,600 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-06-12 19:45:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:51,600 INFO L482 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-06-12 19:45:51,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-06-12 19:45:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:51,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:51,608 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:51,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21583 [2021-06-12 19:45:51,809 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-06-12 19:45:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:51,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229713782] [2021-06-12 19:45:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:51,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:51,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229713782] [2021-06-12 19:45:51,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229713782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:51,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214214630] [2021-06-12 19:45:51,883 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:51,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:51,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:51,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214214630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:51,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:51,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:51,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786650141] [2021-06-12 19:45:51,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:51,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:51,941 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:52,231 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-06-12 19:45:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:52,289 INFO L225 Difference]: With dead ends: 30323 [2021-06-12 19:45:52,290 INFO L226 Difference]: Without dead ends: 30317 [2021-06-12 19:45:52,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:45:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-06-12 19:45:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-06-12 19:45:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-06-12 19:45:52,905 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-06-12 19:45:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:52,905 INFO L482 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-06-12 19:45:52,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-06-12 19:45:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:52,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:52,913 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:53,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21584 [2021-06-12 19:45:53,114 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-06-12 19:45:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:53,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266650517] [2021-06-12 19:45:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:53,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266650517] [2021-06-12 19:45:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266650517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495847324] [2021-06-12 19:45:53,177 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:53,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:45:53,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495847324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:53,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:53,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:45:53,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569844738] [2021-06-12 19:45:53,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:45:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:45:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:53,237 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:53,499 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 19:45:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:53,690 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-06-12 19:45:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:45:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:53,756 INFO L225 Difference]: With dead ends: 34838 [2021-06-12 19:45:53,756 INFO L226 Difference]: Without dead ends: 34838 [2021-06-12 19:45:53,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:45:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-06-12 19:45:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-06-12 19:45:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-06-12 19:45:54,427 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-06-12 19:45:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:54,427 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-06-12 19:45:54,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-06-12 19:45:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:54,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:54,436 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:54,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21585,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:54,637 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-06-12 19:45:54,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:54,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425202916] [2021-06-12 19:45:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:54,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:54,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425202916] [2021-06-12 19:45:54,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425202916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:54,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987154963] [2021-06-12 19:45:54,698 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:54,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:54,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987154963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:54,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:54,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:54,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908693253] [2021-06-12 19:45:54,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:54,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:54,759 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:55,200 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-06-12 19:45:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:55,260 INFO L225 Difference]: With dead ends: 34116 [2021-06-12 19:45:55,260 INFO L226 Difference]: Without dead ends: 34111 [2021-06-12 19:45:55,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-06-12 19:45:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-06-12 19:45:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-06-12 19:45:55,904 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-06-12 19:45:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:55,904 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-06-12 19:45:55,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-06-12 19:45:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:55,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:55,912 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:56,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21586 [2021-06-12 19:45:56,113 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:56,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-06-12 19:45:56,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:56,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541589405] [2021-06-12 19:45:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:56,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:56,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541589405] [2021-06-12 19:45:56,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541589405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:56,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439553167] [2021-06-12 19:45:56,172 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:56,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:56,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439553167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:56,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:56,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:56,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373225997] [2021-06-12 19:45:56,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:56,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:56,238 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:56,518 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-06-12 19:45:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:45:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:56,791 INFO L225 Difference]: With dead ends: 36368 [2021-06-12 19:45:56,791 INFO L226 Difference]: Without dead ends: 36368 [2021-06-12 19:45:56,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:45:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-06-12 19:45:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-06-12 19:45:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-06-12 19:45:57,401 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-06-12 19:45:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:57,401 INFO L482 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-06-12 19:45:57,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-06-12 19:45:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:57,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:57,411 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:57,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21587 [2021-06-12 19:45:57,612 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-06-12 19:45:57,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:57,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715221367] [2021-06-12 19:45:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:57,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:57,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715221367] [2021-06-12 19:45:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715221367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:57,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245442516] [2021-06-12 19:45:57,676 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:57,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:45:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:57,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245442516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:57,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:57,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:57,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621996678] [2021-06-12 19:45:57,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:57,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:57,754 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:58,080 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-06-12 19:45:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:45:58,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:58,132 INFO L225 Difference]: With dead ends: 27914 [2021-06-12 19:45:58,132 INFO L226 Difference]: Without dead ends: 27908 [2021-06-12 19:45:58,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:45:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-06-12 19:45:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-06-12 19:45:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-06-12 19:45:58,703 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-06-12 19:45:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:58,703 INFO L482 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-06-12 19:45:58,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-06-12 19:45:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:58,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:58,712 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:58,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21588 [2021-06-12 19:45:58,913 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-06-12 19:45:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256975359] [2021-06-12 19:45:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:58,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256975359] [2021-06-12 19:45:58,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256975359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26804710] [2021-06-12 19:45:58,973 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:45:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:59,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26804710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:59,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:59,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:45:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780276549] [2021-06-12 19:45:59,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:45:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:59,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:45:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:59,038 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:59,454 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-06-12 19:45:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:59,517 INFO L225 Difference]: With dead ends: 32148 [2021-06-12 19:45:59,517 INFO L226 Difference]: Without dead ends: 32148 [2021-06-12 19:45:59,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:45:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-06-12 19:46:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-06-12 19:46:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-06-12 19:46:00,095 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-06-12 19:46:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:00,095 INFO L482 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-06-12 19:46:00,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-06-12 19:46:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:00,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:00,103 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:00,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21589 [2021-06-12 19:46:00,304 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-06-12 19:46:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:00,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544373067] [2021-06-12 19:46:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:00,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:00,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544373067] [2021-06-12 19:46:00,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544373067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:00,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632105762] [2021-06-12 19:46:00,372 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:00,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:46:00,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:00,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632105762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:00,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:00,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:00,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879934816] [2021-06-12 19:46:00,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:00,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:00,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:00,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:00,433 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:00,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:00,712 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-06-12 19:46:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:46:00,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:00,757 INFO L225 Difference]: With dead ends: 25874 [2021-06-12 19:46:00,758 INFO L226 Difference]: Without dead ends: 25867 [2021-06-12 19:46:00,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:46:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-06-12 19:46:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-06-12 19:46:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-06-12 19:46:01,307 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-06-12 19:46:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:01,307 INFO L482 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-06-12 19:46:01,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-06-12 19:46:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:01,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:01,315 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:01,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21590 [2021-06-12 19:46:01,516 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-06-12 19:46:01,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:01,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599342298] [2021-06-12 19:46:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:01,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599342298] [2021-06-12 19:46:01,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599342298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350714994] [2021-06-12 19:46:01,580 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:01,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:46:01,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:01,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350714994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:01,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:01,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:01,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540285114] [2021-06-12 19:46:01,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:01,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:01,789 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:02,166 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-06-12 19:46:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:46:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:02,218 INFO L225 Difference]: With dead ends: 27927 [2021-06-12 19:46:02,218 INFO L226 Difference]: Without dead ends: 27927 [2021-06-12 19:46:02,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:46:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-06-12 19:46:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-06-12 19:46:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-06-12 19:46:02,723 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-06-12 19:46:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:02,724 INFO L482 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-06-12 19:46:02,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-06-12 19:46:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:02,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:02,731 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:02,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21591,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:02,932 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-06-12 19:46:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:02,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755983772] [2021-06-12 19:46:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:02,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755983772] [2021-06-12 19:46:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755983772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141932876] [2021-06-12 19:46:02,995 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:03,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:46:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:03,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141932876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:03,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:03,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:03,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025173479] [2021-06-12 19:46:03,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:03,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:03,055 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:03,292 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-06-12 19:46:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:46:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:03,345 INFO L225 Difference]: With dead ends: 27147 [2021-06-12 19:46:03,345 INFO L226 Difference]: Without dead ends: 27142 [2021-06-12 19:46:03,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:46:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-06-12 19:46:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-06-12 19:46:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-06-12 19:46:03,886 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-06-12 19:46:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:03,886 INFO L482 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-06-12 19:46:03,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-06-12 19:46:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:03,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:03,894 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:04,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21592,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:04,095 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-06-12 19:46:04,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:04,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977936278] [2021-06-12 19:46:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:04,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977936278] [2021-06-12 19:46:04,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977936278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496472587] [2021-06-12 19:46:04,311 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:04,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:46:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:04,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496472587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:04,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:04,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:04,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967598486] [2021-06-12 19:46:04,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:04,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:04,378 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:04,607 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-06-12 19:46:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:46:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:04,657 INFO L225 Difference]: With dead ends: 27451 [2021-06-12 19:46:04,657 INFO L226 Difference]: Without dead ends: 27451 [2021-06-12 19:46:04,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:46:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-06-12 19:46:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-06-12 19:46:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-06-12 19:46:05,151 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-06-12 19:46:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:05,151 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-06-12 19:46:05,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-06-12 19:46:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:05,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:05,158 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:05,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21593,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:05,359 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-06-12 19:46:05,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:05,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265025043] [2021-06-12 19:46:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:05,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:05,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265025043] [2021-06-12 19:46:05,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265025043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:05,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459150572] [2021-06-12 19:46:05,426 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:05,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:46:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:05,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459150572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:05,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:05,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088047162] [2021-06-12 19:46:05,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:05,493 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:05,697 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-06-12 19:46:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:46:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:05,742 INFO L225 Difference]: With dead ends: 25024 [2021-06-12 19:46:05,742 INFO L226 Difference]: Without dead ends: 25018 [2021-06-12 19:46:05,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:46:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-06-12 19:46:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-06-12 19:46:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-06-12 19:46:06,232 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-06-12 19:46:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:06,232 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-06-12 19:46:06,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-06-12 19:46:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:06,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:06,240 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:06,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21594 [2021-06-12 19:46:06,441 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-06-12 19:46:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:06,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621905634] [2021-06-12 19:46:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:06,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621905634] [2021-06-12 19:46:06,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621905634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760344486] [2021-06-12 19:46:06,502 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:06,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760344486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:06,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:06,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:06,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919499573] [2021-06-12 19:46:06,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:06,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:06,566 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:06,937 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-06-12 19:46:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:46:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:06,986 INFO L225 Difference]: With dead ends: 25874 [2021-06-12 19:46:06,986 INFO L226 Difference]: Without dead ends: 25874 [2021-06-12 19:46:06,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:46:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-06-12 19:46:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-06-12 19:46:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-06-12 19:46:07,530 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-06-12 19:46:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:07,530 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-06-12 19:46:07,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-06-12 19:46:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:07,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:07,538 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:07,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21595 [2021-06-12 19:46:07,738 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-06-12 19:46:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:07,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289360660] [2021-06-12 19:46:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:07,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289360660] [2021-06-12 19:46:07,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289360660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66970175] [2021-06-12 19:46:07,812 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:07,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:46:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:07,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66970175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:07,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:07,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691354902] [2021-06-12 19:46:07,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:07,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:07,873 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:08,075 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-06-12 19:46:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:46:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:08,121 INFO L225 Difference]: With dead ends: 25438 [2021-06-12 19:46:08,121 INFO L226 Difference]: Without dead ends: 25431 [2021-06-12 19:46:08,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:46:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-06-12 19:46:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-06-12 19:46:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-06-12 19:46:08,645 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-06-12 19:46:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:08,645 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-06-12 19:46:08,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-06-12 19:46:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:08,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:08,653 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:08,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21596 [2021-06-12 19:46:08,853 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-06-12 19:46:08,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:08,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118652096] [2021-06-12 19:46:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:08,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:08,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118652096] [2021-06-12 19:46:08,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118652096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:08,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886588692] [2021-06-12 19:46:08,919 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:08,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:46:08,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:08,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886588692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:08,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:08,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:08,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626190632] [2021-06-12 19:46:08,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:08,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:08,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:08,984 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:09,442 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-06-12 19:46:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:46:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:09,484 INFO L225 Difference]: With dead ends: 25599 [2021-06-12 19:46:09,484 INFO L226 Difference]: Without dead ends: 25599 [2021-06-12 19:46:09,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:46:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-12 19:46:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-06-12 19:46:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-06-12 19:46:10,055 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-06-12 19:46:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:10,055 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-06-12 19:46:10,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-06-12 19:46:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:10,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:10,062 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:10,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21597 [2021-06-12 19:46:10,263 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-06-12 19:46:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:10,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483603853] [2021-06-12 19:46:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:10,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:10,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483603853] [2021-06-12 19:46:10,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483603853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:10,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928724996] [2021-06-12 19:46:10,337 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:10,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:46:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:10,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928724996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:10,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:10,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:10,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366472188] [2021-06-12 19:46:10,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:10,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:10,397 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:10,607 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-06-12 19:46:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:46:10,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:10,651 INFO L225 Difference]: With dead ends: 25442 [2021-06-12 19:46:10,651 INFO L226 Difference]: Without dead ends: 25434 [2021-06-12 19:46:10,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:46:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-06-12 19:46:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-06-12 19:46:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-06-12 19:46:11,151 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-06-12 19:46:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:11,151 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-06-12 19:46:11,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-06-12 19:46:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:11,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:11,159 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:11,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21598 [2021-06-12 19:46:11,359 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-06-12 19:46:11,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:11,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138971247] [2021-06-12 19:46:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:11,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:11,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138971247] [2021-06-12 19:46:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138971247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:11,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070716428] [2021-06-12 19:46:11,437 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:11,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:46:11,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:11,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070716428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:11,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:11,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 19:46:11,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105342383] [2021-06-12 19:46:11,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:46:11,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:11,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:46:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:11,506 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:12,083 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-06-12 19:46:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:46:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:12,125 INFO L225 Difference]: With dead ends: 25692 [2021-06-12 19:46:12,125 INFO L226 Difference]: Without dead ends: 25692 [2021-06-12 19:46:12,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:46:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-06-12 19:46:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-06-12 19:46:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-06-12 19:46:12,700 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-06-12 19:46:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:12,700 INFO L482 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-06-12 19:46:12,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-06-12 19:46:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:12,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:12,710 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:12,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21599 [2021-06-12 19:46:12,913 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-06-12 19:46:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:12,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158061541] [2021-06-12 19:46:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:12,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:12,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158061541] [2021-06-12 19:46:12,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158061541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:12,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408986846] [2021-06-12 19:46:12,968 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:12,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:46:12,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:46:13,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408986846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:13,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:13,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:46:13,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185678990] [2021-06-12 19:46:13,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:46:13,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:46:13,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:46:13,028 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:13,175 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-06-12 19:46:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:46:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:13,220 INFO L225 Difference]: With dead ends: 25353 [2021-06-12 19:46:13,221 INFO L226 Difference]: Without dead ends: 25353 [2021-06-12 19:46:13,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:46:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-06-12 19:46:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-06-12 19:46:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-06-12 19:46:13,830 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-06-12 19:46:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:13,830 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-06-12 19:46:13,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-06-12 19:46:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:13,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:13,838 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:14,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21600,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:14,038 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-06-12 19:46:14,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:14,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353359142] [2021-06-12 19:46:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353359142] [2021-06-12 19:46:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353359142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005489864] [2021-06-12 19:46:14,091 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:14,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:46:14,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005489864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:14,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:14,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:46:14,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263054739] [2021-06-12 19:46:14,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:46:14,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:46:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:46:14,147 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:14,371 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-06-12 19:46:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:46:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:14,416 INFO L225 Difference]: With dead ends: 25371 [2021-06-12 19:46:14,416 INFO L226 Difference]: Without dead ends: 25367 [2021-06-12 19:46:14,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:46:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-06-12 19:46:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-06-12 19:46:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-06-12 19:46:14,930 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-06-12 19:46:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:14,930 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-06-12 19:46:14,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-06-12 19:46:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:14,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:14,937 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:15,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21601 [2021-06-12 19:46:15,138 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-06-12 19:46:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:15,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34459819] [2021-06-12 19:46:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:15,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:15,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34459819] [2021-06-12 19:46:15,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34459819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:15,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327825233] [2021-06-12 19:46:15,194 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:15,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:46:15,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:15,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327825233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:15,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:15,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:46:15,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784822572] [2021-06-12 19:46:15,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:46:15,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:15,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:46:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:46:15,249 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:15,583 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-06-12 19:46:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:46:15,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:15,630 INFO L225 Difference]: With dead ends: 25448 [2021-06-12 19:46:15,630 INFO L226 Difference]: Without dead ends: 25447 [2021-06-12 19:46:15,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:46:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-06-12 19:46:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-06-12 19:46:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-06-12 19:46:16,137 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-06-12 19:46:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:16,137 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-06-12 19:46:16,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-06-12 19:46:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:16,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:16,144 INFO L472 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:16,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:16,345 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:16,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-06-12 19:46:16,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:16,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742640753] [2021-06-12 19:46:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:16,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:16,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742640753] [2021-06-12 19:46:16,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742640753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:16,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555663514] [2021-06-12 19:46:16,397 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:16,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:46:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:16,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:16,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555663514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:16,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:16,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:46:16,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898918357] [2021-06-12 19:46:16,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:46:16,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:16,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:46:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:46:16,470 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:16,659 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-06-12 19:46:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:46:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:16,705 INFO L225 Difference]: With dead ends: 25635 [2021-06-12 19:46:16,705 INFO L226 Difference]: Without dead ends: 25635 [2021-06-12 19:46:16,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:46:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-06-12 19:46:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-06-12 19:46:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-06-12 19:46:17,248 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-06-12 19:46:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:17,248 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-06-12 19:46:17,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-06-12 19:46:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:17,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:17,256 INFO L472 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-06-12 19:46:17,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21603,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:17,456 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:17,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:17,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-06-12 19:46:17,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:17,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203443345] [2021-06-12 19:46:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-12 19:46:17,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472180228] [2021-06-12 19:46:17,458 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:17,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:46:17,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:46:17,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:17,485 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-12 19:46:17,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21604,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:17,686 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 19:46:17,688 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 19:46:17,689 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 19:46:17,689 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 07:46:17 BasicIcfg [2021-06-12 19:46:17,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 19:46:17,690 INFO L168 Benchmark]: Toolchain (without parser) took 852009.95 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 108.3 MB in the beginning and 7.1 GB in the end (delta: -7.0 GB). Peak memory consumption was 860.3 MB. Max. memory is 8.0 GB. [2021-06-12 19:46:17,690 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 19:46:17,690 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.50 ms. Allocated memory is still 127.9 MB. Free memory was 108.2 MB in the beginning and 106.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 19:46:17,690 INFO L168 Benchmark]: Boogie Preprocessor took 16.75 ms. Allocated memory is still 127.9 MB. Free memory was 106.8 MB in the beginning and 105.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 19:46:17,690 INFO L168 Benchmark]: RCFGBuilder took 312.13 ms. Allocated memory is still 127.9 MB. Free memory was 105.8 MB in the beginning and 109.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-06-12 19:46:17,690 INFO L168 Benchmark]: TraceAbstraction took 851652.26 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 108.9 MB in the beginning and 7.1 GB in the end (delta: -7.0 GB). Peak memory consumption was 860.1 MB. Max. memory is 8.0 GB. [2021-06-12 19:46:17,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.50 ms. Allocated memory is still 127.9 MB. Free memory was 108.2 MB in the beginning and 106.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.75 ms. Allocated memory is still 127.9 MB. Free memory was 106.8 MB in the beginning and 105.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.13 ms. Allocated memory is still 127.9 MB. Free memory was 105.8 MB in the beginning and 109.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 851652.26 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 108.9 MB in the beginning and 7.1 GB in the end (delta: -7.0 GB). Peak memory consumption was 860.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 11,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 851586.9ms, OverallIterations: 242, TraceHistogramMax: 11, EmptinessCheckTime: 1149.0ms, AutomataDifference: 58357.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5425 SDtfs, 20018 SDslu, 34680 SDs, 0 SdLazy, 36629 SolverSat, 5650 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14086.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9790 GetRequests, 4527 SyntacticMatches, 111 SemanticMatches, 5152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29436 ImplicationChecksByTransitivity, 30239.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51187occurred in iteration=151, InterpolantAutomatonStates: 4836, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 72164.0ms AutomataMinimizationTime, 241 MinimizatonAttempts, 207751 StatesRemovedByMinimization, 234 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 701.8ms SsaConstructionTime, 2704.7ms SatisfiabilityAnalysisTime, 661988.6ms InterpolantComputationTime, 9655 NumberOfCodeBlocks, 9654 NumberOfCodeBlocksAsserted, 1092 NumberOfCheckSat, 9176 ConstructedInterpolants, 0 QuantifiedInterpolants, 40726 SizeOfPredicates, 156 NumberOfNonLiveVariables, 19538 ConjunctsInSsa, 3420 ConjunctsInUnsatCore, 479 InterpolantComputations, 3 PerfectInterpolantSequences, 8418/24766 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown