/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:54:21,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:54:21,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:54:21,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:54:21,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:54:21,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:54:21,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:54:21,339 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-Separate.epf [2021-06-05 15:54:21,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:54:21,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:54:21,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:54:21,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:54:21,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:54:21,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:54:21,372 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:54:21,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:54:21,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:54:21,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:54:21,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:54:21,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:54:21,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:54:21,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:54:21,375 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:54:21,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:54:21,375 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:54:21,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:54:21,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:54:21,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:54:21,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:54:21,631 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:54:21,632 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:54:21,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2021-06-05 15:54:21,633 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2021-06-05 15:54:21,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:54:21,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:54:21,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:54:21,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:54:21,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:54:21,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:54:21,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:54:21,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:54:21,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:54:21,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/1) ... [2021-06-05 15:54:21,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:54:21,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:54:21,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:54:21,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:54:21,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (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 [2021-06-05 15:54:21,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:54:21,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:54:21,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:54:21,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:54:21,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:54:21,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:54:21,765 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:54:21,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:54:21,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:54:21,766 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:54:21,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:54:21,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:54:21,766 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:54:21,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:54:21,911 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:54:21,912 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:54:21 BoogieIcfgContainer [2021-06-05 15:54:21,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:54:21,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:54:21,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:54:21,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:54:21,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:54:21" (1/2) ... [2021-06-05 15:54:21,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a7982 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:54:21, skipping insertion in model container [2021-06-05 15:54:21,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:54:21" (2/2) ... [2021-06-05 15:54:21,917 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2021-06-05 15:54:21,920 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:54:21,920 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:54:21,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:54:21,921 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:54:21,972 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:54:21,990 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:54:22,018 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:54:22,018 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:54:22,018 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:54:22,018 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:54:22,019 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:54:22,019 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:54:22,019 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:54:22,019 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:54:22,038 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-06-05 15:54:22,082 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:54:22,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,091 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1387413595, now seen corresponding path program 1 times [2021-06-05 15:54:22,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338575239] [2021-06-05 15:54:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:22,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338575239] [2021-06-05 15:54:22,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338575239] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:22,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:22,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:54:22,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773605796] [2021-06-05 15:54:22,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:54:22,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:22,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:54:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:54:22,281 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:22,322 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-06-05 15:54:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:54:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:54:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:22,334 INFO L225 Difference]: With dead ends: 257 [2021-06-05 15:54:22,335 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 15:54:22,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:54:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 15:54:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-06-05 15:54:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-06-05 15:54:22,391 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-06-05 15:54:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:22,391 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-06-05 15:54:22,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-06-05 15:54:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:54:22,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,393 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:54:22,394 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1521254665, now seen corresponding path program 1 times [2021-06-05 15:54:22,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457539639] [2021-06-05 15:54:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:22,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457539639] [2021-06-05 15:54:22,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457539639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:22,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:22,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:54:22,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386051989] [2021-06-05 15:54:22,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:54:22,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:54:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:54:22,441 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-06-05 15:54:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:22,483 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2021-06-05 15:54:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:54:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:54:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:22,489 INFO L225 Difference]: With dead ends: 355 [2021-06-05 15:54:22,489 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 15:54:22,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:54:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 15:54:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2021-06-05 15:54:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2021-06-05 15:54:22,509 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2021-06-05 15:54:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:22,509 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2021-06-05 15:54:22,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-06-05 15:54:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2021-06-05 15:54:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:54:22,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,511 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:54:22,511 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1294033285, now seen corresponding path program 2 times [2021-06-05 15:54:22,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694627443] [2021-06-05 15:54:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:22,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694627443] [2021-06-05 15:54:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694627443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:22,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:22,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:54:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36242028] [2021-06-05 15:54:22,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:54:22,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:54:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:54:22,555 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-06-05 15:54:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:22,601 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2021-06-05 15:54:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:54:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:54:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:22,607 INFO L225 Difference]: With dead ends: 450 [2021-06-05 15:54:22,608 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 15:54:22,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:54:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 15:54:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-06-05 15:54:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2021-06-05 15:54:22,629 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2021-06-05 15:54:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:22,629 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2021-06-05 15:54:22,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-06-05 15:54:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2021-06-05 15:54:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:54:22,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,633 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:54:22,634 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1381326531, now seen corresponding path program 3 times [2021-06-05 15:54:22,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626529130] [2021-06-05 15:54:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:22,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626529130] [2021-06-05 15:54:22,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626529130] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:22,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:22,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:54:22,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076326426] [2021-06-05 15:54:22,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:54:22,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:54:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:54:22,663 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-06-05 15:54:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:22,693 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2021-06-05 15:54:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:54:22,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:54:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:22,696 INFO L225 Difference]: With dead ends: 349 [2021-06-05 15:54:22,696 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 15:54:22,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:54:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 15:54:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2021-06-05 15:54:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2021-06-05 15:54:22,705 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2021-06-05 15:54:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:22,706 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2021-06-05 15:54:22,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-06-05 15:54:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2021-06-05 15:54:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:54:22,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:54:22,707 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,707 INFO L82 PathProgramCache]: Analyzing trace with hash -132679827, now seen corresponding path program 1 times [2021-06-05 15:54:22,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767416747] [2021-06-05 15:54:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:22,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767416747] [2021-06-05 15:54:22,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767416747] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:22,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:22,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:54:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106194208] [2021-06-05 15:54:22,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:54:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:54:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:54:22,773 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:22,841 INFO L93 Difference]: Finished difference Result 349 states and 1020 transitions. [2021-06-05 15:54:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:54:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:22,843 INFO L225 Difference]: With dead ends: 349 [2021-06-05 15:54:22,843 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 15:54:22,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:54:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 15:54:22,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 299. [2021-06-05 15:54:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.030201342281879) internal successors, (903), 298 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 903 transitions. [2021-06-05 15:54:22,850 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 903 transitions. Word has length 19 [2021-06-05 15:54:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:22,850 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 903 transitions. [2021-06-05 15:54:22,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 903 transitions. [2021-06-05 15:54:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:54:22,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:54:22,851 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1937348973, now seen corresponding path program 2 times [2021-06-05 15:54:22,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086258799] [2021-06-05 15:54:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:22,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086258799] [2021-06-05 15:54:22,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086258799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:22,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:22,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:54:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51804420] [2021-06-05 15:54:22,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:54:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:54:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:54:22,904 INFO L87 Difference]: Start difference. First operand 299 states and 903 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:22,914 INFO L93 Difference]: Finished difference Result 258 states and 767 transitions. [2021-06-05 15:54:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:54:22,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:54:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:22,915 INFO L225 Difference]: With dead ends: 258 [2021-06-05 15:54:22,915 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 15:54:22,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:54:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 15:54:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-06-05 15:54:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.0808510638297872) internal successors, (724), 235 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 724 transitions. [2021-06-05 15:54:22,921 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 724 transitions. Word has length 19 [2021-06-05 15:54:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:22,921 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 724 transitions. [2021-06-05 15:54:22,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 724 transitions. [2021-06-05 15:54:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:54:22,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:22,922 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:22,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 15:54:22,922 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash 134265877, now seen corresponding path program 1 times [2021-06-05 15:54:22,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:22,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590767197] [2021-06-05 15:54:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:22,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:22,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590767197] [2021-06-05 15:54:22,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590767197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:22,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057090180] [2021-06-05 15:54:22,948 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 [2021-06-05 15:54:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:54:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:23,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057090180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:23,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:23,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 15:54:23,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144866476] [2021-06-05 15:54:23,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:54:23,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:23,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:54:23,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:54:23,094 INFO L87 Difference]: Start difference. First operand 236 states and 724 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:23,154 INFO L93 Difference]: Finished difference Result 416 states and 1235 transitions. [2021-06-05 15:54:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:54:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:23,157 INFO L225 Difference]: With dead ends: 416 [2021-06-05 15:54:23,157 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 15:54:23,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 15:54:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 217. [2021-06-05 15:54:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.060185185185185) internal successors, (661), 216 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 661 transitions. [2021-06-05 15:54:23,166 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 661 transitions. Word has length 20 [2021-06-05 15:54:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:23,166 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 661 transitions. [2021-06-05 15:54:23,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 661 transitions. [2021-06-05 15:54:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:54:23,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:23,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:23,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 15:54:23,383 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash -114849777, now seen corresponding path program 2 times [2021-06-05 15:54:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:23,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319939794] [2021-06-05 15:54:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:23,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:23,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319939794] [2021-06-05 15:54:23,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319939794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:23,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122444111] [2021-06-05 15:54:23,431 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 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 [2021-06-05 15:54:23,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:23,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:54:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:23,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122444111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:23,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:23,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 15:54:23,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188150823] [2021-06-05 15:54:23,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:23,535 INFO L87 Difference]: Start difference. First operand 217 states and 661 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:23,591 INFO L93 Difference]: Finished difference Result 310 states and 951 transitions. [2021-06-05 15:54:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:54:23,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:54:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:23,592 INFO L225 Difference]: With dead ends: 310 [2021-06-05 15:54:23,592 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 15:54:23,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:54:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 15:54:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 209. [2021-06-05 15:54:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 3.0625) internal successors, (637), 208 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 637 transitions. [2021-06-05 15:54:23,597 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 637 transitions. Word has length 20 [2021-06-05 15:54:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:23,597 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 637 transitions. [2021-06-05 15:54:23,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 637 transitions. [2021-06-05 15:54:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:54:23,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:23,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:23,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:23,813 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash 795815307, now seen corresponding path program 1 times [2021-06-05 15:54:23,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:23,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657913186] [2021-06-05 15:54:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:23,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:23,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657913186] [2021-06-05 15:54:23,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657913186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:23,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258675275] [2021-06-05 15:54:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:54:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258675275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:23,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:23,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 15:54:23,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252640860] [2021-06-05 15:54:23,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:54:23,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:54:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:54:23,917 INFO L87 Difference]: Start difference. First operand 209 states and 637 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-06-05 15:54:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:23,958 INFO L93 Difference]: Finished difference Result 421 states and 1250 transitions. [2021-06-05 15:54:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) Word has length 21 [2021-06-05 15:54:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:23,961 INFO L225 Difference]: With dead ends: 421 [2021-06-05 15:54:23,961 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 15:54:23,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 15:54:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 221. [2021-06-05 15:54:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.059090909090909) internal successors, (673), 220 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 673 transitions. [2021-06-05 15:54:23,966 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 673 transitions. Word has length 21 [2021-06-05 15:54:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:23,966 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 673 transitions. [2021-06-05 15:54:23,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-06-05 15:54:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 673 transitions. [2021-06-05 15:54:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:54:23,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:23,967 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:24,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:24,189 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2104887795, now seen corresponding path program 2 times [2021-06-05 15:54:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:24,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097404016] [2021-06-05 15:54:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:24,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097404016] [2021-06-05 15:54:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097404016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959418524] [2021-06-05 15:54:24,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:54:24,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:24,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:24,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:54:24,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959418524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:24,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:24,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 15:54:24,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773849945] [2021-06-05 15:54:24,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:24,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:24,277 INFO L87 Difference]: Start difference. First operand 221 states and 673 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-06-05 15:54:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:24,320 INFO L93 Difference]: Finished difference Result 270 states and 810 transitions. [2021-06-05 15:54:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:54:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) Word has length 21 [2021-06-05 15:54:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:24,322 INFO L225 Difference]: With dead ends: 270 [2021-06-05 15:54:24,322 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 15:54:24,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:54:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 15:54:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 215. [2021-06-05 15:54:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-05 15:54:24,327 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-06-05 15:54:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:24,327 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-05 15:54:24,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-06-05 15:54:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-05 15:54:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:54:24,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:24,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:24,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:24,541 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1224555989, now seen corresponding path program 1 times [2021-06-05 15:54:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:24,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583865439] [2021-06-05 15:54:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:24,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:24,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583865439] [2021-06-05 15:54:24,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583865439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:24,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014566656] [2021-06-05 15:54:24,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 15:54:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:54:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 15:54:24,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:24,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:24,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:54:24,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:24,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:24,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 15:54:24,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:24,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:24,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:24,768 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:14 [2021-06-05 15:54:24,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:54:24,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:24,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:24,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:24,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 15:54:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:24,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014566656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:24,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:24,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:54:24,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113153589] [2021-06-05 15:54:24,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:54:24,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:54:24,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:24,834 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:24,907 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2021-06-05 15:54:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:54:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:24,909 INFO L225 Difference]: With dead ends: 476 [2021-06-05 15:54:24,909 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 15:54:24,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 15:54:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2021-06-05 15:54:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 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) [2021-06-05 15:54:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-06-05 15:54:24,916 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-06-05 15:54:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:24,917 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-06-05 15:54:24,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-06-05 15:54:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:54:24,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:24,917 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:25,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 15:54:25,133 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash 444763657, now seen corresponding path program 2 times [2021-06-05 15:54:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:25,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168290062] [2021-06-05 15:54:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:25,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:25,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168290062] [2021-06-05 15:54:25,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168290062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:25,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899544557] [2021-06-05 15:54:25,203 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 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 [2021-06-05 15:54:25,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:54:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:25,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:25,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:54:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 15:54:25,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-05 15:54:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 15:54:25,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 15:54:25,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2021-06-05 15:54:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:25,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899544557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:25,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:25,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:54:25,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867383618] [2021-06-05 15:54:25,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:25,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:25,390 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-06-05 15:54:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:25,457 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2021-06-05 15:54:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-06-05 15:54:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:25,459 INFO L225 Difference]: With dead ends: 517 [2021-06-05 15:54:25,459 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 15:54:25,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 15:54:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2021-06-05 15:54:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 15:54:25,467 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 15:54:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:25,467 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 15:54:25,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-06-05 15:54:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 15:54:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:54:25,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:25,468 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:25,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:25,681 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash -674031635, now seen corresponding path program 3 times [2021-06-05 15:54:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976767951] [2021-06-05 15:54:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976767951] [2021-06-05 15:54:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976767951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701691102] [2021-06-05 15:54:25,734 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 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 [2021-06-05 15:54:25,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:54:25,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:54:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:25,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:25,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:54:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 15:54:25,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 15:54:25,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-06-05 15:54:25,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:54:25,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:25,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:25,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 15:54:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701691102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:25,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:25,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:54:25,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480017392] [2021-06-05 15:54:25,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:54:25,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:54:25,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:25,901 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:25,982 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2021-06-05 15:54:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:54:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:25,985 INFO L225 Difference]: With dead ends: 572 [2021-06-05 15:54:25,985 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 15:54:25,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 15:54:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2021-06-05 15:54:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 15:54:25,993 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 15:54:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:25,993 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 15:54:25,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 15:54:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:54:25,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:25,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:26,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:26,209 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1902444169, now seen corresponding path program 4 times [2021-06-05 15:54:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126505021] [2021-06-05 15:54:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:26,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126505021] [2021-06-05 15:54:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126505021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773011150] [2021-06-05 15:54:26,234 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 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 [2021-06-05 15:54:26,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:26,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:26,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773011150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:26,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:26,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:54:26,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200797242] [2021-06-05 15:54:26,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:26,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:26,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:26,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:26,304 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-06-05 15:54:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:26,387 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2021-06-05 15:54:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:54:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) Word has length 25 [2021-06-05 15:54:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:26,390 INFO L225 Difference]: With dead ends: 886 [2021-06-05 15:54:26,390 INFO L226 Difference]: Without dead ends: 886 [2021-06-05 15:54:26,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:54:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-06-05 15:54:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2021-06-05 15:54:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2021-06-05 15:54:26,405 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2021-06-05 15:54:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:26,405 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2021-06-05 15:54:26,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-06-05 15:54:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2021-06-05 15:54:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:54:26,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:26,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:26,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:54:26,621 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2029468015, now seen corresponding path program 5 times [2021-06-05 15:54:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161472908] [2021-06-05 15:54:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:26,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161472908] [2021-06-05 15:54:26,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161472908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541278743] [2021-06-05 15:54:26,646 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 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 [2021-06-05 15:54:26,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:54:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:26,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:26,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:26,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541278743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:26,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:26,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 15:54:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640115405] [2021-06-05 15:54:26,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:54:26,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:26,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:54:26,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:54:26,721 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-06-05 15:54:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:27,306 INFO L93 Difference]: Finished difference Result 1687 states and 5019 transitions. [2021-06-05 15:54:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:54:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 25 [2021-06-05 15:54:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:27,313 INFO L225 Difference]: With dead ends: 1687 [2021-06-05 15:54:27,313 INFO L226 Difference]: Without dead ends: 1687 [2021-06-05 15:54:27,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=439, Invalid=1541, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:54:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-06-05 15:54:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 733. [2021-06-05 15:54:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.2991803278688523) internal successors, (2415), 732 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2415 transitions. [2021-06-05 15:54:27,335 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2415 transitions. Word has length 25 [2021-06-05 15:54:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:27,335 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2415 transitions. [2021-06-05 15:54:27,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-06-05 15:54:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2415 transitions. [2021-06-05 15:54:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:54:27,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:27,336 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:27,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:54:27,553 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash 156506377, now seen corresponding path program 6 times [2021-06-05 15:54:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:27,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934389754] [2021-06-05 15:54:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:27,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934389754] [2021-06-05 15:54:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934389754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732750263] [2021-06-05 15:54:27,576 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 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 [2021-06-05 15:54:27,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:54:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:27,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732750263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:27,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:27,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 15:54:27,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324271087] [2021-06-05 15:54:27,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:54:27,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:27,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:54:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:27,665 INFO L87 Difference]: Start difference. First operand 733 states and 2415 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:27,923 INFO L93 Difference]: Finished difference Result 2324 states and 7206 transitions. [2021-06-05 15:54:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:54:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:54:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:27,932 INFO L225 Difference]: With dead ends: 2324 [2021-06-05 15:54:27,932 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 15:54:27,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:54:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 15:54:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1083. [2021-06-05 15:54:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.502772643253235) internal successors, (3790), 1082 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3790 transitions. [2021-06-05 15:54:27,962 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3790 transitions. Word has length 25 [2021-06-05 15:54:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:27,963 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 3790 transitions. [2021-06-05 15:54:27,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3790 transitions. [2021-06-05 15:54:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:54:27,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:27,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:28,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:54:28,185 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1025392081, now seen corresponding path program 7 times [2021-06-05 15:54:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715614201] [2021-06-05 15:54:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:28,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:28,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715614201] [2021-06-05 15:54:28,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715614201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:28,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463081235] [2021-06-05 15:54:28,203 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 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 [2021-06-05 15:54:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:54:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463081235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:28,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:28,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 15:54:28,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631891815] [2021-06-05 15:54:28,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:28,278 INFO L87 Difference]: Start difference. First operand 1083 states and 3790 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-06-05 15:54:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:28,344 INFO L93 Difference]: Finished difference Result 2714 states and 8888 transitions. [2021-06-05 15:54:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:54:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 25 [2021-06-05 15:54:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:28,354 INFO L225 Difference]: With dead ends: 2714 [2021-06-05 15:54:28,354 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 15:54:28,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:54:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 15:54:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1645. [2021-06-05 15:54:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.4793187347931873) internal successors, (5720), 1644 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5720 transitions. [2021-06-05 15:54:28,401 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5720 transitions. Word has length 25 [2021-06-05 15:54:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:28,401 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5720 transitions. [2021-06-05 15:54:28,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-06-05 15:54:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5720 transitions. [2021-06-05 15:54:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:54:28,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:28,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:28,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:54:28,623 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:28,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2082329639, now seen corresponding path program 8 times [2021-06-05 15:54:28,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:28,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522047346] [2021-06-05 15:54:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:28,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:28,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522047346] [2021-06-05 15:54:28,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522047346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:28,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698397039] [2021-06-05 15:54:28,642 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 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 [2021-06-05 15:54:28,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:28,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:28,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:28,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:28,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698397039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:28,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:28,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:54:28,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366668128] [2021-06-05 15:54:28,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:54:28,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:54:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:28,704 INFO L87 Difference]: Start difference. First operand 1645 states and 5720 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:28,920 INFO L93 Difference]: Finished difference Result 4129 states and 13699 transitions. [2021-06-05 15:54:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:54:28,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:54:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:28,935 INFO L225 Difference]: With dead ends: 4129 [2021-06-05 15:54:28,936 INFO L226 Difference]: Without dead ends: 4097 [2021-06-05 15:54:28,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:54:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-06-05 15:54:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 2092. [2021-06-05 15:54:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.625538020086083) internal successors, (7581), 2091 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7581 transitions. [2021-06-05 15:54:28,987 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7581 transitions. Word has length 25 [2021-06-05 15:54:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:28,988 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7581 transitions. [2021-06-05 15:54:28,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7581 transitions. [2021-06-05 15:54:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:54:28,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:28,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:29,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:54:29,205 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1027156865, now seen corresponding path program 9 times [2021-06-05 15:54:29,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:29,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859515600] [2021-06-05 15:54:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:29,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:29,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859515600] [2021-06-05 15:54:29,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859515600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:29,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534624106] [2021-06-05 15:54:29,225 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 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 [2021-06-05 15:54:29,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:54:29,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:54:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534624106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:29,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:29,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:54:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829937408] [2021-06-05 15:54:29,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:54:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:29,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:54:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:54:29,313 INFO L87 Difference]: Start difference. First operand 2092 states and 7581 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:29,791 INFO L93 Difference]: Finished difference Result 5288 states and 17206 transitions. [2021-06-05 15:54:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:54:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:54:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:29,803 INFO L225 Difference]: With dead ends: 5288 [2021-06-05 15:54:29,803 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 15:54:29,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:54:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 15:54:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 2638. [2021-06-05 15:54:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 3.684489950701555) internal successors, (9716), 2637 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 9716 transitions. [2021-06-05 15:54:29,862 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 9716 transitions. Word has length 25 [2021-06-05 15:54:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:29,862 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 9716 transitions. [2021-06-05 15:54:29,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 9716 transitions. [2021-06-05 15:54:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:54:29,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:29,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:30,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:30,081 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1396055139, now seen corresponding path program 10 times [2021-06-05 15:54:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047604522] [2021-06-05 15:54:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:30,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047604522] [2021-06-05 15:54:30,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047604522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630858328] [2021-06-05 15:54:30,100 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 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 [2021-06-05 15:54:30,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:30,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:30,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:30,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630858328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:30,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:30,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:54:30,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312698842] [2021-06-05 15:54:30,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:30,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:30,167 INFO L87 Difference]: Start difference. First operand 2638 states and 9716 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:30,249 INFO L93 Difference]: Finished difference Result 5602 states and 20412 transitions. [2021-06-05 15:54:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:54:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:54:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:30,262 INFO L225 Difference]: With dead ends: 5602 [2021-06-05 15:54:30,262 INFO L226 Difference]: Without dead ends: 5358 [2021-06-05 15:54:30,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:54:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5358 states. [2021-06-05 15:54:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5358 to 4772. [2021-06-05 15:54:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 3.6952420876126597) internal successors, (17630), 4771 states have internal predecessors, (17630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 17630 transitions. [2021-06-05 15:54:30,357 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 17630 transitions. Word has length 26 [2021-06-05 15:54:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:30,357 INFO L482 AbstractCegarLoop]: Abstraction has 4772 states and 17630 transitions. [2021-06-05 15:54:30,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 17630 transitions. [2021-06-05 15:54:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:54:30,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:30,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:30,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:30,581 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1428029849, now seen corresponding path program 11 times [2021-06-05 15:54:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:30,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609551559] [2021-06-05 15:54:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:30,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:30,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609551559] [2021-06-05 15:54:30,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609551559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:30,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482559554] [2021-06-05 15:54:30,605 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 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 [2021-06-05 15:54:30,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:54:30,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:54:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:30,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482559554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:30,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:30,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:54:30,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45127302] [2021-06-05 15:54:30,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:30,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:30,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:30,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:30,675 INFO L87 Difference]: Start difference. First operand 4772 states and 17630 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:30,770 INFO L93 Difference]: Finished difference Result 8897 states and 32176 transitions. [2021-06-05 15:54:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:54:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:54:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:30,788 INFO L225 Difference]: With dead ends: 8897 [2021-06-05 15:54:30,788 INFO L226 Difference]: Without dead ends: 8654 [2021-06-05 15:54:30,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:54:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2021-06-05 15:54:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 7628. [2021-06-05 15:54:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7628 states, 7627 states have (on average 3.7472138455487087) internal successors, (28580), 7627 states have internal predecessors, (28580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7628 states to 7628 states and 28580 transitions. [2021-06-05 15:54:30,982 INFO L78 Accepts]: Start accepts. Automaton has 7628 states and 28580 transitions. Word has length 26 [2021-06-05 15:54:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:30,982 INFO L482 AbstractCegarLoop]: Abstraction has 7628 states and 28580 transitions. [2021-06-05 15:54:30,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7628 states and 28580 transitions. [2021-06-05 15:54:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:54:30,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:30,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:31,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:54:31,209 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1734973483, now seen corresponding path program 12 times [2021-06-05 15:54:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:31,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817711161] [2021-06-05 15:54:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:31,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:31,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817711161] [2021-06-05 15:54:31,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817711161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:31,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986727795] [2021-06-05 15:54:31,228 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 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 [2021-06-05 15:54:31,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:54:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:31,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986727795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:31,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:31,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:54:31,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362512529] [2021-06-05 15:54:31,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:54:31,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:31,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:54:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:54:31,301 INFO L87 Difference]: Start difference. First operand 7628 states and 28580 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:31,685 INFO L93 Difference]: Finished difference Result 10751 states and 37115 transitions. [2021-06-05 15:54:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:54:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:54:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:31,745 INFO L225 Difference]: With dead ends: 10751 [2021-06-05 15:54:31,745 INFO L226 Difference]: Without dead ends: 10677 [2021-06-05 15:54:31,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:54:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-05 15:54:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 7465. [2021-06-05 15:54:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7464 states have (on average 3.6856913183279745) internal successors, (27510), 7464 states have internal predecessors, (27510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 27510 transitions. [2021-06-05 15:54:31,922 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 27510 transitions. Word has length 26 [2021-06-05 15:54:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:31,922 INFO L482 AbstractCegarLoop]: Abstraction has 7465 states and 27510 transitions. [2021-06-05 15:54:31,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 27510 transitions. [2021-06-05 15:54:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:54:31,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:31,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:32,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:32,152 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1940239527, now seen corresponding path program 13 times [2021-06-05 15:54:32,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:32,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460521295] [2021-06-05 15:54:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:54:32,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460521295] [2021-06-05 15:54:32,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460521295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:54:32,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:54:32,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:54:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762793227] [2021-06-05 15:54:32,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:54:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:54:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:54:32,174 INFO L87 Difference]: Start difference. First operand 7465 states and 27510 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-06-05 15:54:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:32,245 INFO L93 Difference]: Finished difference Result 7784 states and 28007 transitions. [2021-06-05 15:54:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:54:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 27 [2021-06-05 15:54:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:32,258 INFO L225 Difference]: With dead ends: 7784 [2021-06-05 15:54:32,258 INFO L226 Difference]: Without dead ends: 7531 [2021-06-05 15:54:32,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:54:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7531 states. [2021-06-05 15:54:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7531 to 6204. [2021-06-05 15:54:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 6203 states have (on average 3.709817830082218) internal successors, (23012), 6203 states have internal predecessors, (23012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 23012 transitions. [2021-06-05 15:54:32,365 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 23012 transitions. Word has length 27 [2021-06-05 15:54:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:32,366 INFO L482 AbstractCegarLoop]: Abstraction has 6204 states and 23012 transitions. [2021-06-05 15:54:32,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-06-05 15:54:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 23012 transitions. [2021-06-05 15:54:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:54:32,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:32,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:32,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 15:54:32,375 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1371753675, now seen corresponding path program 14 times [2021-06-05 15:54:32,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:32,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90925109] [2021-06-05 15:54:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:32,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90925109] [2021-06-05 15:54:32,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90925109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31279974] [2021-06-05 15:54:32,392 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 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 [2021-06-05 15:54:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:32,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31279974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:32,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:32,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:54:32,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945781994] [2021-06-05 15:54:32,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:54:32,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:54:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:54:32,465 INFO L87 Difference]: Start difference. First operand 6204 states and 23012 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:32,598 INFO L93 Difference]: Finished difference Result 7929 states and 28597 transitions. [2021-06-05 15:54:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:54:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:54:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:32,611 INFO L225 Difference]: With dead ends: 7929 [2021-06-05 15:54:32,612 INFO L226 Difference]: Without dead ends: 7853 [2021-06-05 15:54:32,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:54:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2021-06-05 15:54:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7353. [2021-06-05 15:54:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.6584602829162134) internal successors, (26897), 7352 states have internal predecessors, (26897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 26897 transitions. [2021-06-05 15:54:32,727 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 26897 transitions. Word has length 28 [2021-06-05 15:54:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:32,727 INFO L482 AbstractCegarLoop]: Abstraction has 7353 states and 26897 transitions. [2021-06-05 15:54:32,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 26897 transitions. [2021-06-05 15:54:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:54:32,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:32,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:32,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:54:32,954 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:32,955 INFO L82 PathProgramCache]: Analyzing trace with hash 20325037, now seen corresponding path program 15 times [2021-06-05 15:54:32,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:32,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104781697] [2021-06-05 15:54:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:32,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:32,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104781697] [2021-06-05 15:54:32,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104781697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:32,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892548679] [2021-06-05 15:54:32,974 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 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 [2021-06-05 15:54:33,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:54:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:54:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:54:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892548679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:33,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:33,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:54:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026370753] [2021-06-05 15:54:33,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:54:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:54:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:54:33,042 INFO L87 Difference]: Start difference. First operand 7353 states and 26897 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:33,123 INFO L93 Difference]: Finished difference Result 7591 states and 27470 transitions. [2021-06-05 15:54:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:54:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:54:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:33,138 INFO L225 Difference]: With dead ends: 7591 [2021-06-05 15:54:33,138 INFO L226 Difference]: Without dead ends: 7566 [2021-06-05 15:54:33,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:54:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7566 states. [2021-06-05 15:54:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7566 to 7108. [2021-06-05 15:54:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.6607570001407064) internal successors, (26017), 7107 states have internal predecessors, (26017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 26017 transitions. [2021-06-05 15:54:33,240 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 26017 transitions. Word has length 28 [2021-06-05 15:54:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:33,240 INFO L482 AbstractCegarLoop]: Abstraction has 7108 states and 26017 transitions. [2021-06-05 15:54:33,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 26017 transitions. [2021-06-05 15:54:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:33,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:33,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:33,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:54:33,465 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:33,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1776101465, now seen corresponding path program 16 times [2021-06-05 15:54:33,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:33,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91797960] [2021-06-05 15:54:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:33,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:33,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91797960] [2021-06-05 15:54:33,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91797960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:33,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127823180] [2021-06-05 15:54:33,747 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 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 [2021-06-05 15:54:33,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:33,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:54:33,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:33,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-06-05 15:54:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 15:54:33,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:33,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:54:33,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:54:33,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:33,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,955 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:72, output treesize:32 [2021-06-05 15:54:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:54:33,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:33,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:33,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-06-05 15:54:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:34,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127823180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:34,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:34,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 15:54:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709776082] [2021-06-05 15:54:34,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:54:34,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:54:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:54:34,007 INFO L87 Difference]: Start difference. First operand 7108 states and 26017 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:34,641 INFO L93 Difference]: Finished difference Result 11620 states and 41399 transitions. [2021-06-05 15:54:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:54:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:34,659 INFO L225 Difference]: With dead ends: 11620 [2021-06-05 15:54:34,659 INFO L226 Difference]: Without dead ends: 11571 [2021-06-05 15:54:34,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:54:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2021-06-05 15:54:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 7187. [2021-06-05 15:54:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7187 states, 7186 states have (on average 3.6554411355413303) internal successors, (26268), 7186 states have internal predecessors, (26268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7187 states to 7187 states and 26268 transitions. [2021-06-05 15:54:34,815 INFO L78 Accepts]: Start accepts. Automaton has 7187 states and 26268 transitions. Word has length 30 [2021-06-05 15:54:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:34,815 INFO L482 AbstractCegarLoop]: Abstraction has 7187 states and 26268 transitions. [2021-06-05 15:54:34,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7187 states and 26268 transitions. [2021-06-05 15:54:34,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:34,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:34,826 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:35,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 15:54:35,043 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash -421352833, now seen corresponding path program 17 times [2021-06-05 15:54:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288111485] [2021-06-05 15:54:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288111485] [2021-06-05 15:54:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288111485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293257472] [2021-06-05 15:54:35,073 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 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 [2021-06-05 15:54:35,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:54:35,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:54:35,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:54:35,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293257472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:35,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:35,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2021-06-05 15:54:35,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610346139] [2021-06-05 15:54:35,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:54:35,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:54:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:54:35,158 INFO L87 Difference]: Start difference. First operand 7187 states and 26268 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:35,426 INFO L93 Difference]: Finished difference Result 10562 states and 37386 transitions. [2021-06-05 15:54:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:54:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:35,443 INFO L225 Difference]: With dead ends: 10562 [2021-06-05 15:54:35,443 INFO L226 Difference]: Without dead ends: 10400 [2021-06-05 15:54:35,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:54:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-06-05 15:54:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 8770. [2021-06-05 15:54:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 3.574866005245752) internal successors, (31348), 8769 states have internal predecessors, (31348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 31348 transitions. [2021-06-05 15:54:35,568 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 31348 transitions. Word has length 30 [2021-06-05 15:54:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:35,568 INFO L482 AbstractCegarLoop]: Abstraction has 8770 states and 31348 transitions. [2021-06-05 15:54:35,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 31348 transitions. [2021-06-05 15:54:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:35,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:35,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:35,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:54:35,780 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 252611545, now seen corresponding path program 18 times [2021-06-05 15:54:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:35,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481065713] [2021-06-05 15:54:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:36,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:36,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481065713] [2021-06-05 15:54:36,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481065713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:36,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327327724] [2021-06-05 15:54:36,192 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 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 [2021-06-05 15:54:36,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:54:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:54:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:36,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:36,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:36,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 15:54:36,383 INFO L446 ElimStorePlain]: Different costs {1=[v_C_16], 5=[A, B]} [2021-06-05 15:54:36,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:36,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:54:36,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 15:54:36,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:36,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:36,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-06-05 15:54:36,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:36,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,425 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:25 [2021-06-05 15:54:36,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:54:36,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:54:36,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:36,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:36,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:55 [2021-06-05 15:54:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:36,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327327724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:36,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:36,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 15:54:36,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844686323] [2021-06-05 15:54:36,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:54:36,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:36,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:54:36,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:54:36,594 INFO L87 Difference]: Start difference. First operand 8770 states and 31348 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:37,487 INFO L93 Difference]: Finished difference Result 13256 states and 46625 transitions. [2021-06-05 15:54:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:54:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:37,557 INFO L225 Difference]: With dead ends: 13256 [2021-06-05 15:54:37,558 INFO L226 Difference]: Without dead ends: 13229 [2021-06-05 15:54:37,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:54:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-06-05 15:54:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 8865. [2021-06-05 15:54:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 3.571976534296029) internal successors, (31662), 8864 states have internal predecessors, (31662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 31662 transitions. [2021-06-05 15:54:37,704 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 31662 transitions. Word has length 30 [2021-06-05 15:54:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:37,704 INFO L482 AbstractCegarLoop]: Abstraction has 8865 states and 31662 transitions. [2021-06-05 15:54:37,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 31662 transitions. [2021-06-05 15:54:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:37,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:37,715 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:37,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:54:37,915 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash -942793939, now seen corresponding path program 19 times [2021-06-05 15:54:37,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:37,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980866872] [2021-06-05 15:54:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:38,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:38,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980866872] [2021-06-05 15:54:38,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980866872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:38,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087495164] [2021-06-05 15:54:38,129 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 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 [2021-06-05 15:54:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:38,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:38,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:38,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 15:54:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 15:54:38,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:54:38,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 15:54:38,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:38,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:50, output treesize:18 [2021-06-05 15:54:38,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:54:38,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:38,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:38,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-06-05 15:54:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:38,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087495164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:38,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:38,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:54:38,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3481058] [2021-06-05 15:54:38,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:54:38,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:54:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:54:38,355 INFO L87 Difference]: Start difference. First operand 8865 states and 31662 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:38,980 INFO L93 Difference]: Finished difference Result 13286 states and 46643 transitions. [2021-06-05 15:54:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:54:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:39,006 INFO L225 Difference]: With dead ends: 13286 [2021-06-05 15:54:39,006 INFO L226 Difference]: Without dead ends: 13151 [2021-06-05 15:54:39,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:54:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13151 states. [2021-06-05 15:54:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13151 to 8879. [2021-06-05 15:54:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8879 states, 8878 states have (on average 3.5710745663437713) internal successors, (31704), 8878 states have internal predecessors, (31704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 31704 transitions. [2021-06-05 15:54:39,160 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 31704 transitions. Word has length 30 [2021-06-05 15:54:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:39,160 INFO L482 AbstractCegarLoop]: Abstraction has 8879 states and 31704 transitions. [2021-06-05 15:54:39,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 31704 transitions. [2021-06-05 15:54:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:39,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:39,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:39,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:39,371 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2058545279, now seen corresponding path program 20 times [2021-06-05 15:54:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10822416] [2021-06-05 15:54:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:39,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:39,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10822416] [2021-06-05 15:54:39,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10822416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:39,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155660728] [2021-06-05 15:54:39,588 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 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 [2021-06-05 15:54:39,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:39,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:39,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:39,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 15:54:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:39,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 15:54:39,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:39,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:62 [2021-06-05 15:54:39,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-06-05 15:54:39,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:39,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:33 [2021-06-05 15:54:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:54:39,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:39,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 15:54:39,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:39,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:39,804 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 15:54:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:39,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155660728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:39,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:39,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:54:39,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990555892] [2021-06-05 15:54:39,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:54:39,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:39,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:54:39,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:54:39,821 INFO L87 Difference]: Start difference. First operand 8879 states and 31704 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:40,500 INFO L93 Difference]: Finished difference Result 13372 states and 47018 transitions. [2021-06-05 15:54:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:54:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:40,523 INFO L225 Difference]: With dead ends: 13372 [2021-06-05 15:54:40,524 INFO L226 Difference]: Without dead ends: 13344 [2021-06-05 15:54:40,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:54:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13344 states. [2021-06-05 15:54:40,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13344 to 8900. [2021-06-05 15:54:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8900 states, 8899 states have (on average 3.570513540847286) internal successors, (31774), 8899 states have internal predecessors, (31774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8900 states to 8900 states and 31774 transitions. [2021-06-05 15:54:40,681 INFO L78 Accepts]: Start accepts. Automaton has 8900 states and 31774 transitions. Word has length 30 [2021-06-05 15:54:40,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:40,681 INFO L482 AbstractCegarLoop]: Abstraction has 8900 states and 31774 transitions. [2021-06-05 15:54:40,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8900 states and 31774 transitions. [2021-06-05 15:54:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:40,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:40,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:40,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:54:40,908 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1117626725, now seen corresponding path program 21 times [2021-06-05 15:54:40,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:40,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402187367] [2021-06-05 15:54:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:41,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402187367] [2021-06-05 15:54:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402187367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898759757] [2021-06-05 15:54:41,118 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 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 [2021-06-05 15:54:41,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:54:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:41,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:54:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:54:41,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:41,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:54:41,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 15:54:41,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:41,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:49 [2021-06-05 15:54:41,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:54:41,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:41,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:54:41,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:41,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:24 [2021-06-05 15:54:41,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2021-06-05 15:54:41,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:54:41,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:41,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:41,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:93 [2021-06-05 15:54:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:41,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898759757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:41,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:41,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 15:54:41,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858323566] [2021-06-05 15:54:41,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:54:41,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:54:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:54:41,516 INFO L87 Difference]: Start difference. First operand 8900 states and 31774 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:42,366 INFO L93 Difference]: Finished difference Result 13503 states and 47332 transitions. [2021-06-05 15:54:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:54:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:42,391 INFO L225 Difference]: With dead ends: 13503 [2021-06-05 15:54:42,391 INFO L226 Difference]: Without dead ends: 13436 [2021-06-05 15:54:42,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 676.8ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:54:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-06-05 15:54:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 8933. [2021-06-05 15:54:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8933 states, 8932 states have (on average 3.5681818181818183) internal successors, (31871), 8932 states have internal predecessors, (31871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 31871 transitions. [2021-06-05 15:54:42,536 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 31871 transitions. Word has length 30 [2021-06-05 15:54:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:42,536 INFO L482 AbstractCegarLoop]: Abstraction has 8933 states and 31871 transitions. [2021-06-05 15:54:42,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 31871 transitions. [2021-06-05 15:54:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:42,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:42,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:42,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:42,754 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash 843443479, now seen corresponding path program 22 times [2021-06-05 15:54:42,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:42,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592488712] [2021-06-05 15:54:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:42,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592488712] [2021-06-05 15:54:42,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592488712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043100707] [2021-06-05 15:54:42,942 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 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 [2021-06-05 15:54:42,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:42,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:43,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:43,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:43,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 15:54:43,089 INFO L446 ElimStorePlain]: Different costs {1=[v_C_24], 5=[A, B]} [2021-06-05 15:54:43,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 15:54:43,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:43,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-06-05 15:54:43,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:43,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:43,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:43,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 15:54:43,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:43,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,128 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-06-05 15:54:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:54:43,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:43,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:43,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:5 [2021-06-05 15:54:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:43,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043100707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:43,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:43,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:54:43,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003025878] [2021-06-05 15:54:43,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:54:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:54:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:54:43,172 INFO L87 Difference]: Start difference. First operand 8933 states and 31871 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:43,727 INFO L93 Difference]: Finished difference Result 13324 states and 46727 transitions. [2021-06-05 15:54:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:54:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:43,749 INFO L225 Difference]: With dead ends: 13324 [2021-06-05 15:54:43,749 INFO L226 Difference]: Without dead ends: 13237 [2021-06-05 15:54:43,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:54:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13237 states. [2021-06-05 15:54:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13237 to 8939. [2021-06-05 15:54:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8939 states, 8938 states have (on average 3.567129111658089) internal successors, (31883), 8938 states have internal predecessors, (31883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8939 states to 8939 states and 31883 transitions. [2021-06-05 15:54:43,891 INFO L78 Accepts]: Start accepts. Automaton has 8939 states and 31883 transitions. Word has length 30 [2021-06-05 15:54:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:43,891 INFO L482 AbstractCegarLoop]: Abstraction has 8939 states and 31883 transitions. [2021-06-05 15:54:43,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8939 states and 31883 transitions. [2021-06-05 15:54:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:43,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:43,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:44,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:54:44,102 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1195736663, now seen corresponding path program 23 times [2021-06-05 15:54:44,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:44,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728300210] [2021-06-05 15:54:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:44,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:44,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728300210] [2021-06-05 15:54:44,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728300210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:44,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074440905] [2021-06-05 15:54:44,376 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 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 [2021-06-05 15:54:44,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:54:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:54:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:44,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:44,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:44,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 15:54:44,539 INFO L446 ElimStorePlain]: Different costs {1=[v_C_26], 5=[A, B]} [2021-06-05 15:54:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:44,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:54:44,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:44,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:44,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 15:54:44,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:44,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-06-05 15:54:44,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:44,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,573 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 15:54:44,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:54:44,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:44,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:44,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:54:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:44,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074440905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:44,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:44,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 15:54:44,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631606138] [2021-06-05 15:54:44,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:54:44,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:54:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:54:44,640 INFO L87 Difference]: Start difference. First operand 8939 states and 31883 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:45,477 INFO L93 Difference]: Finished difference Result 13308 states and 46713 transitions. [2021-06-05 15:54:45,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:54:45,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:45,498 INFO L225 Difference]: With dead ends: 13308 [2021-06-05 15:54:45,499 INFO L226 Difference]: Without dead ends: 13275 [2021-06-05 15:54:45,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:54:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13275 states. [2021-06-05 15:54:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13275 to 8993. [2021-06-05 15:54:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8993 states, 8992 states have (on average 3.5652802491103204) internal successors, (32059), 8992 states have internal predecessors, (32059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8993 states to 8993 states and 32059 transitions. [2021-06-05 15:54:45,647 INFO L78 Accepts]: Start accepts. Automaton has 8993 states and 32059 transitions. Word has length 30 [2021-06-05 15:54:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:45,647 INFO L482 AbstractCegarLoop]: Abstraction has 8993 states and 32059 transitions. [2021-06-05 15:54:45,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8993 states and 32059 transitions. [2021-06-05 15:54:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:45,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:45,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:45,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:45,866 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 867632129, now seen corresponding path program 24 times [2021-06-05 15:54:45,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:45,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335475670] [2021-06-05 15:54:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:46,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335475670] [2021-06-05 15:54:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335475670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611824999] [2021-06-05 15:54:46,106 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 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 [2021-06-05 15:54:46,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:54:46,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:46,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:46,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:46,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:46,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 15:54:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:46,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:54:46,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:46,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:54:46,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:54:46,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:46,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-06-05 15:54:46,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:54:46,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:54:46,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:46,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:46,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:54:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611824999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:46,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:46,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 15:54:46,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61710079] [2021-06-05 15:54:46,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:54:46,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:54:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:54:46,349 INFO L87 Difference]: Start difference. First operand 8993 states and 32059 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:47,179 INFO L93 Difference]: Finished difference Result 12157 states and 42507 transitions. [2021-06-05 15:54:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:54:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:47,199 INFO L225 Difference]: With dead ends: 12157 [2021-06-05 15:54:47,199 INFO L226 Difference]: Without dead ends: 12130 [2021-06-05 15:54:47,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:54:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12130 states. [2021-06-05 15:54:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12130 to 9077. [2021-06-05 15:54:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9077 states, 9076 states have (on average 3.5637946231820186) internal successors, (32345), 9076 states have internal predecessors, (32345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9077 states to 9077 states and 32345 transitions. [2021-06-05 15:54:47,349 INFO L78 Accepts]: Start accepts. Automaton has 9077 states and 32345 transitions. Word has length 30 [2021-06-05 15:54:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:47,349 INFO L482 AbstractCegarLoop]: Abstraction has 9077 states and 32345 transitions. [2021-06-05 15:54:47,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 9077 states and 32345 transitions. [2021-06-05 15:54:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:47,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:47,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:47,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 15:54:47,573 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash -251163163, now seen corresponding path program 25 times [2021-06-05 15:54:47,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:47,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184503260] [2021-06-05 15:54:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:47,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184503260] [2021-06-05 15:54:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184503260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936969217] [2021-06-05 15:54:47,810 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 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 [2021-06-05 15:54:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:47,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:47,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:47,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 15:54:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:47,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:54:47,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:47,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:54:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:47,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:47,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 15:54:47,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:47,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:47,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-06-05 15:54:47,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:47,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:47,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:24 [2021-06-05 15:54:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:54:48,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:48,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:48,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:48,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:54:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:48,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936969217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:48,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:48,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 15:54:48,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040970089] [2021-06-05 15:54:48,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:54:48,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:54:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:54:48,026 INFO L87 Difference]: Start difference. First operand 9077 states and 32345 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:48,918 INFO L93 Difference]: Finished difference Result 11981 states and 41950 transitions. [2021-06-05 15:54:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:54:48,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:48,938 INFO L225 Difference]: With dead ends: 11981 [2021-06-05 15:54:48,938 INFO L226 Difference]: Without dead ends: 11892 [2021-06-05 15:54:48,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:54:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2021-06-05 15:54:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 9111. [2021-06-05 15:54:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9110 states have (on average 3.5622392974753017) internal successors, (32452), 9110 states have internal predecessors, (32452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 32452 transitions. [2021-06-05 15:54:49,095 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 32452 transitions. Word has length 30 [2021-06-05 15:54:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:49,096 INFO L482 AbstractCegarLoop]: Abstraction has 9111 states and 32452 transitions. [2021-06-05 15:54:49,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 32452 transitions. [2021-06-05 15:54:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:49,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:49,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:49,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:49,306 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2094092255, now seen corresponding path program 26 times [2021-06-05 15:54:49,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:49,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565823356] [2021-06-05 15:54:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:49,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:49,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565823356] [2021-06-05 15:54:49,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565823356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:49,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780537013] [2021-06-05 15:54:49,538 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 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 [2021-06-05 15:54:49,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:49,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:49,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:49,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:54:49,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:49,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:54:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:49,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:54:49,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:49,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 15:54:49,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:49,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:49,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 15:54:49,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:49,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:49,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-06-05 15:54:49,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:49,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,691 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:20 [2021-06-05 15:54:49,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:54:49,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:49,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:49,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:54:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780537013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:49,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:49,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-06-05 15:54:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327957514] [2021-06-05 15:54:49,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:54:49,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:54:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:54:49,742 INFO L87 Difference]: Start difference. First operand 9111 states and 32452 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:50,393 INFO L93 Difference]: Finished difference Result 12163 states and 42519 transitions. [2021-06-05 15:54:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:54:50,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:50,412 INFO L225 Difference]: With dead ends: 12163 [2021-06-05 15:54:50,413 INFO L226 Difference]: Without dead ends: 12130 [2021-06-05 15:54:50,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:54:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12130 states. [2021-06-05 15:54:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12130 to 9144. [2021-06-05 15:54:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9144 states, 9143 states have (on average 3.564803674942579) internal successors, (32593), 9143 states have internal predecessors, (32593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9144 states to 9144 states and 32593 transitions. [2021-06-05 15:54:50,587 INFO L78 Accepts]: Start accepts. Automaton has 9144 states and 32593 transitions. Word has length 30 [2021-06-05 15:54:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:50,587 INFO L482 AbstractCegarLoop]: Abstraction has 9144 states and 32593 transitions. [2021-06-05 15:54:50,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9144 states and 32593 transitions. [2021-06-05 15:54:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:50,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:50,598 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:50,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:54:50,798 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1897056969, now seen corresponding path program 27 times [2021-06-05 15:54:50,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:50,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300219802] [2021-06-05 15:54:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:51,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:51,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300219802] [2021-06-05 15:54:51,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300219802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:51,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907185825] [2021-06-05 15:54:51,022 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 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 [2021-06-05 15:54:51,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:54:51,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:54:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:51,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:51,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:51,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:54:51,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 15:54:51,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:51,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:54:51,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:54:51,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 15:54:51,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:51,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,253 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:26 [2021-06-05 15:54:51,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:54:51,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:54:51,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:51,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:51,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:93 [2021-06-05 15:54:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:51,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907185825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:51,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:51,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 15:54:51,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396782033] [2021-06-05 15:54:51,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:54:51,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:51,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:54:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:54:51,404 INFO L87 Difference]: Start difference. First operand 9144 states and 32593 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:52,228 INFO L93 Difference]: Finished difference Result 13605 states and 47715 transitions. [2021-06-05 15:54:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:54:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:52,251 INFO L225 Difference]: With dead ends: 13605 [2021-06-05 15:54:52,251 INFO L226 Difference]: Without dead ends: 13538 [2021-06-05 15:54:52,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:54:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13538 states. [2021-06-05 15:54:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13538 to 9123. [2021-06-05 15:54:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9123 states, 9122 states have (on average 3.5661039245779436) internal successors, (32530), 9122 states have internal predecessors, (32530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9123 states to 9123 states and 32530 transitions. [2021-06-05 15:54:52,442 INFO L78 Accepts]: Start accepts. Automaton has 9123 states and 32530 transitions. Word has length 30 [2021-06-05 15:54:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:52,442 INFO L482 AbstractCegarLoop]: Abstraction has 9123 states and 32530 transitions. [2021-06-05 15:54:52,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 9123 states and 32530 transitions. [2021-06-05 15:54:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:52,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:52,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:52,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:52,653 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 389444073, now seen corresponding path program 28 times [2021-06-05 15:54:52,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:52,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284801131] [2021-06-05 15:54:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:52,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:52,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284801131] [2021-06-05 15:54:52,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284801131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:52,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414776265] [2021-06-05 15:54:52,849 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 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 [2021-06-05 15:54:52,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:52,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:52,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:52,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:52,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:52,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:54:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:53,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 15:54:53,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:53,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:53,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:54:53,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:53,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:53,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:54:53,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:53,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:53,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:53,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:72, output treesize:32 [2021-06-05 15:54:53,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:54:53,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:53,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:53,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:53,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:54:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:53,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414776265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:53,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:53,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 15:54:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111861523] [2021-06-05 15:54:53,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:54:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:54:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:54:53,069 INFO L87 Difference]: Start difference. First operand 9123 states and 32530 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:54,805 INFO L93 Difference]: Finished difference Result 14261 states and 49701 transitions. [2021-06-05 15:54:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:54:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:54,826 INFO L225 Difference]: With dead ends: 14261 [2021-06-05 15:54:54,826 INFO L226 Difference]: Without dead ends: 14163 [2021-06-05 15:54:54,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1352.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:54:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14163 states. [2021-06-05 15:54:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14163 to 9151. [2021-06-05 15:54:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9151 states, 9150 states have (on average 3.565792349726776) internal successors, (32627), 9150 states have internal predecessors, (32627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9151 states to 9151 states and 32627 transitions. [2021-06-05 15:54:54,968 INFO L78 Accepts]: Start accepts. Automaton has 9151 states and 32627 transitions. Word has length 30 [2021-06-05 15:54:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:54,968 INFO L482 AbstractCegarLoop]: Abstraction has 9151 states and 32627 transitions. [2021-06-05 15:54:54,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 9151 states and 32627 transitions. [2021-06-05 15:54:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:54,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:54,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:55,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:54:55,186 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -726307267, now seen corresponding path program 29 times [2021-06-05 15:54:55,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:55,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318872514] [2021-06-05 15:54:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:55,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318872514] [2021-06-05 15:54:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318872514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916713097] [2021-06-05 15:54:55,299 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 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 [2021-06-05 15:54:55,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:54:55,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 15:54:55,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:55,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:55,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:55,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 15:54:55,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:55,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 15:54:55,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:55,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:76 [2021-06-05 15:54:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:55,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-06-05 15:54:55,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:55,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:56 [2021-06-05 15:54:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:54:55,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:55,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 15:54:55,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:55,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:55,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:54:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916713097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:55,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:55,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 15:54:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328627014] [2021-06-05 15:54:55,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:54:55,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:54:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:54:55,617 INFO L87 Difference]: Start difference. First operand 9151 states and 32627 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:55,900 INFO L93 Difference]: Finished difference Result 9698 states and 34264 transitions. [2021-06-05 15:54:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:54:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:55,915 INFO L225 Difference]: With dead ends: 9698 [2021-06-05 15:54:55,915 INFO L226 Difference]: Without dead ends: 9627 [2021-06-05 15:54:55,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:54:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-06-05 15:54:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 9169. [2021-06-05 15:54:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9169 states, 9168 states have (on average 3.5642452006980805) internal successors, (32677), 9168 states have internal predecessors, (32677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9169 states to 9169 states and 32677 transitions. [2021-06-05 15:54:56,041 INFO L78 Accepts]: Start accepts. Automaton has 9169 states and 32677 transitions. Word has length 30 [2021-06-05 15:54:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:56,041 INFO L482 AbstractCegarLoop]: Abstraction has 9169 states and 32677 transitions. [2021-06-05 15:54:56,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9169 states and 32677 transitions. [2021-06-05 15:54:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:56,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:56,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:56,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:54:56,253 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:56,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1845102559, now seen corresponding path program 30 times [2021-06-05 15:54:56,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:56,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368492170] [2021-06-05 15:54:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:56,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:56,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368492170] [2021-06-05 15:54:56,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368492170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:56,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508195068] [2021-06-05 15:54:56,366 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 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 [2021-06-05 15:54:56,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:54:56,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:56,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:56,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:56,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:56,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:56,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:54:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:56,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 15:54:56,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:56,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:73 [2021-06-05 15:54:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:56,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-06-05 15:54:56,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 15:54:56,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:56,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:32 [2021-06-05 15:54:56,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:54:56,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:56,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:56,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:54:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:56,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508195068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:56,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:56,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:54:56,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749191669] [2021-06-05 15:54:56,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:54:56,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:54:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:54:56,617 INFO L87 Difference]: Start difference. First operand 9169 states and 32677 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-06-05 15:54:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:56,925 INFO L93 Difference]: Finished difference Result 9792 states and 34514 transitions. [2021-06-05 15:54:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:54:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:56,942 INFO L225 Difference]: With dead ends: 9792 [2021-06-05 15:54:56,942 INFO L226 Difference]: Without dead ends: 9717 [2021-06-05 15:54:56,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:54:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2021-06-05 15:54:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 9157. [2021-06-05 15:54:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 3.56564001747488) internal successors, (32647), 9156 states have internal predecessors, (32647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 32647 transitions. [2021-06-05 15:54:57,108 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 32647 transitions. Word has length 30 [2021-06-05 15:54:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:57,108 INFO L482 AbstractCegarLoop]: Abstraction has 9157 states and 32647 transitions. [2021-06-05 15:54:57,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-06-05 15:54:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 32647 transitions. [2021-06-05 15:54:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:57,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:57,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:57,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:54:57,320 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1071325629, now seen corresponding path program 31 times [2021-06-05 15:54:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:57,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768021233] [2021-06-05 15:54:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:57,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:57,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768021233] [2021-06-05 15:54:57,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768021233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434386138] [2021-06-05 15:54:57,417 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 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 [2021-06-05 15:54:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:54:57,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:57,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:54:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 15:54:57,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:57,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:51 [2021-06-05 15:54:57,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:57,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 15:54:57,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:57,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:30 [2021-06-05 15:54:57,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:54:57,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:57,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 15:54:57,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:57,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:57,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 15:54:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:57,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434386138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:57,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:57,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:54:57,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412226964] [2021-06-05 15:54:57,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:54:57,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:54:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:54:57,653 INFO L87 Difference]: Start difference. First operand 9157 states and 32647 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:57,817 INFO L93 Difference]: Finished difference Result 9977 states and 35188 transitions. [2021-06-05 15:54:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:54:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:57,833 INFO L225 Difference]: With dead ends: 9977 [2021-06-05 15:54:57,833 INFO L226 Difference]: Without dead ends: 9949 [2021-06-05 15:54:57,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:54:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-06-05 15:54:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 9195. [2021-06-05 15:54:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9195 states, 9194 states have (on average 3.562867087230803) internal successors, (32757), 9194 states have internal predecessors, (32757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9195 states to 9195 states and 32757 transitions. [2021-06-05 15:54:57,960 INFO L78 Accepts]: Start accepts. Automaton has 9195 states and 32757 transitions. Word has length 30 [2021-06-05 15:54:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:57,960 INFO L482 AbstractCegarLoop]: Abstraction has 9195 states and 32757 transitions. [2021-06-05 15:54:57,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 9195 states and 32757 transitions. [2021-06-05 15:54:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:57,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:57,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:58,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:54:58,171 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash -349125983, now seen corresponding path program 32 times [2021-06-05 15:54:58,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:58,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600241877] [2021-06-05 15:54:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:58,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:58,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600241877] [2021-06-05 15:54:58,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600241877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:58,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717576074] [2021-06-05 15:54:58,266 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 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 [2021-06-05 15:54:58,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:58,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:54:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:58,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:58,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:58,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:54:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:58,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 15:54:58,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:58,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:53 [2021-06-05 15:54:58,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-06-05 15:54:58,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:58,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:29 [2021-06-05 15:54:58,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:54:58,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:58,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 15:54:58,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:58,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:58,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:54:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:58,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717576074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:58,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:58,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:54:58,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097946253] [2021-06-05 15:54:58,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:54:58,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:54:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:54:58,489 INFO L87 Difference]: Start difference. First operand 9195 states and 32757 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:58,711 INFO L93 Difference]: Finished difference Result 9766 states and 34506 transitions. [2021-06-05 15:54:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:54:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:54:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:58,726 INFO L225 Difference]: With dead ends: 9766 [2021-06-05 15:54:58,726 INFO L226 Difference]: Without dead ends: 9729 [2021-06-05 15:54:58,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:54:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2021-06-05 15:54:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 9220. [2021-06-05 15:54:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9220 states, 9219 states have (on average 3.5616661243084935) internal successors, (32835), 9219 states have internal predecessors, (32835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9220 states to 9220 states and 32835 transitions. [2021-06-05 15:54:58,899 INFO L78 Accepts]: Start accepts. Automaton has 9220 states and 32835 transitions. Word has length 30 [2021-06-05 15:54:58,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:58,899 INFO L482 AbstractCegarLoop]: Abstraction has 9220 states and 32835 transitions. [2021-06-05 15:54:58,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states and 32835 transitions. [2021-06-05 15:54:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:54:58,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:58,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:59,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 15:54:59,111 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1368944027, now seen corresponding path program 33 times [2021-06-05 15:54:59,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:59,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835365959] [2021-06-05 15:54:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:59,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:59,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835365959] [2021-06-05 15:54:59,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835365959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:59,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109702389] [2021-06-05 15:54:59,192 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 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 [2021-06-05 15:54:59,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:54:59,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 15:54:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:59,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:54:59,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:59,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:54:59,306 INFO L354 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2021-06-05 15:54:59,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:54:59,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:59,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:54:59,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 15:54:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:59,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:54:59,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,602 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.5 percent of original size [2021-06-05 15:54:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:59,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 15:54:59,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:59,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:54:59,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:28 [2021-06-05 15:54:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:54:59,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:54:59,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 15:54:59,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:59,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:59,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:5 [2021-06-05 15:54:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:54:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109702389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:59,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:59,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 15:54:59,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382285341] [2021-06-05 15:54:59,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:54:59,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:54:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:54:59,677 INFO L87 Difference]: Start difference. First operand 9220 states and 32835 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 15:55:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:00,499 INFO L93 Difference]: Finished difference Result 9769 states and 34444 transitions. [2021-06-05 15:55:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:55:00,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:00,516 INFO L225 Difference]: With dead ends: 9769 [2021-06-05 15:55:00,516 INFO L226 Difference]: Without dead ends: 9706 [2021-06-05 15:55:00,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=90, Invalid=507, Unknown=3, NotChecked=0, Total=600 [2021-06-05 15:55:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9706 states. [2021-06-05 15:55:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9706 to 9224. [2021-06-05 15:55:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9224 states, 9223 states have (on average 3.5623983519462215) internal successors, (32856), 9223 states have internal predecessors, (32856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9224 states to 9224 states and 32856 transitions. [2021-06-05 15:55:00,667 INFO L78 Accepts]: Start accepts. Automaton has 9224 states and 32856 transitions. Word has length 30 [2021-06-05 15:55:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:00,668 INFO L482 AbstractCegarLoop]: Abstraction has 9224 states and 32856 transitions. [2021-06-05 15:55:00,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 15:55:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9224 states and 32856 transitions. [2021-06-05 15:55:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:00,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:00,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:00,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:55:00,893 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1023315629, now seen corresponding path program 34 times [2021-06-05 15:55:00,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:00,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507865834] [2021-06-05 15:55:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:01,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:01,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507865834] [2021-06-05 15:55:01,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507865834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:01,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218488337] [2021-06-05 15:55:01,116 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 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 [2021-06-05 15:55:01,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:01,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:55:01,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:01,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:55:01,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:01,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 15:55:01,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:01,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:55:01,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:01,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:01,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:55:01,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:01,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,307 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:72, output treesize:26 [2021-06-05 15:55:01,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:55:01,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:01,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:01,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-06-05 15:55:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:01,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218488337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:01,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:01,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 15:55:01,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046227464] [2021-06-05 15:55:01,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:55:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:55:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:55:01,350 INFO L87 Difference]: Start difference. First operand 9224 states and 32856 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:02,783 INFO L93 Difference]: Finished difference Result 14407 states and 50119 transitions. [2021-06-05 15:55:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:55:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:02,811 INFO L225 Difference]: With dead ends: 14407 [2021-06-05 15:55:02,811 INFO L226 Difference]: Without dead ends: 14237 [2021-06-05 15:55:02,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1114.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:55:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14237 states. [2021-06-05 15:55:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14237 to 9268. [2021-06-05 15:55:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 9267 states have (on average 3.5612388043595553) internal successors, (33002), 9267 states have internal predecessors, (33002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 33002 transitions. [2021-06-05 15:55:02,964 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 33002 transitions. Word has length 30 [2021-06-05 15:55:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:02,964 INFO L482 AbstractCegarLoop]: Abstraction has 9268 states and 33002 transitions. [2021-06-05 15:55:02,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 33002 transitions. [2021-06-05 15:55:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:02,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:02,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:03,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 15:55:03,175 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2139066969, now seen corresponding path program 35 times [2021-06-05 15:55:03,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:03,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428204609] [2021-06-05 15:55:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:03,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:03,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428204609] [2021-06-05 15:55:03,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428204609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:03,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722326820] [2021-06-05 15:55:03,384 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 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 [2021-06-05 15:55:03,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:55:03,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 15:55:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:03,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:55:03,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:03,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 15:55:03,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:55:03,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:55:03,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:03,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:51 [2021-06-05 15:55:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:55:03,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:03,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 15:55:03,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:55:03,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:03,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:55:03,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:03,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:03,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:55:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722326820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:03,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:03,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:55:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529143181] [2021-06-05 15:55:03,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:55:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:55:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:55:03,729 INFO L87 Difference]: Start difference. First operand 9268 states and 33002 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:04,846 INFO L93 Difference]: Finished difference Result 14615 states and 50901 transitions. [2021-06-05 15:55:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:55:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:04,871 INFO L225 Difference]: With dead ends: 14615 [2021-06-05 15:55:04,871 INFO L226 Difference]: Without dead ends: 14557 [2021-06-05 15:55:04,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 856.4ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:55:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-06-05 15:55:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 9302. [2021-06-05 15:55:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9302 states, 9301 states have (on average 3.558972153531878) internal successors, (33102), 9301 states have internal predecessors, (33102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9302 states to 9302 states and 33102 transitions. [2021-06-05 15:55:05,027 INFO L78 Accepts]: Start accepts. Automaton has 9302 states and 33102 transitions. Word has length 30 [2021-06-05 15:55:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:05,028 INFO L482 AbstractCegarLoop]: Abstraction has 9302 states and 33102 transitions. [2021-06-05 15:55:05,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9302 states and 33102 transitions. [2021-06-05 15:55:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:05,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:05,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:05,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:05,239 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1037105035, now seen corresponding path program 36 times [2021-06-05 15:55:05,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:05,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317567425] [2021-06-05 15:55:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:05,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:05,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317567425] [2021-06-05 15:55:05,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317567425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:05,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289384815] [2021-06-05 15:55:05,450 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 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 [2021-06-05 15:55:05,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:55:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:05,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:05,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:05,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:05,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:05,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:05,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 15:55:05,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:05,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 15:55:05,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:55:05,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:05,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 15:55:05,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:05,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:20 [2021-06-05 15:55:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:55:05,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:05,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:05,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:55:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:05,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289384815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:05,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:05,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 15:55:05,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783241467] [2021-06-05 15:55:05,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:55:05,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:05,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:55:05,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:55:05,677 INFO L87 Difference]: Start difference. First operand 9302 states and 33102 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:06,620 INFO L93 Difference]: Finished difference Result 14587 states and 50771 transitions. [2021-06-05 15:55:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:55:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:06,645 INFO L225 Difference]: With dead ends: 14587 [2021-06-05 15:55:06,645 INFO L226 Difference]: Without dead ends: 14422 [2021-06-05 15:55:06,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:55:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-06-05 15:55:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 9290. [2021-06-05 15:55:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9290 states, 9289 states have (on average 3.5594789536010336) internal successors, (33064), 9289 states have internal predecessors, (33064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 33064 transitions. [2021-06-05 15:55:06,851 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 33064 transitions. Word has length 30 [2021-06-05 15:55:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:06,851 INFO L482 AbstractCegarLoop]: Abstraction has 9290 states and 33064 transitions. [2021-06-05 15:55:06,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:06,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 33064 transitions. [2021-06-05 15:55:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:06,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:06,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:07,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:07,064 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 402302739, now seen corresponding path program 37 times [2021-06-05 15:55:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:07,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548630711] [2021-06-05 15:55:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:07,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548630711] [2021-06-05 15:55:07,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548630711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181304703] [2021-06-05 15:55:07,260 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 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 [2021-06-05 15:55:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:07,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:07,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:07,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 15:55:07,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:07,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:55:07,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:07,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 15:55:07,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:07,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,438 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:50, output treesize:24 [2021-06-05 15:55:07,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:55:07,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:07,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:07,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-06-05 15:55:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181304703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:07,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:07,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 15:55:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149014302] [2021-06-05 15:55:07,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:55:07,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:55:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:55:07,484 INFO L87 Difference]: Start difference. First operand 9290 states and 33064 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:08,287 INFO L93 Difference]: Finished difference Result 14255 states and 49757 transitions. [2021-06-05 15:55:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:55:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:08,311 INFO L225 Difference]: With dead ends: 14255 [2021-06-05 15:55:08,311 INFO L226 Difference]: Without dead ends: 14178 [2021-06-05 15:55:08,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 731.5ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:55:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14178 states. [2021-06-05 15:55:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14178 to 9344. [2021-06-05 15:55:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9344 states, 9343 states have (on average 3.558492989403832) internal successors, (33247), 9343 states have internal predecessors, (33247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9344 states to 9344 states and 33247 transitions. [2021-06-05 15:55:08,457 INFO L78 Accepts]: Start accepts. Automaton has 9344 states and 33247 transitions. Word has length 30 [2021-06-05 15:55:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:08,457 INFO L482 AbstractCegarLoop]: Abstraction has 9344 states and 33247 transitions. [2021-06-05 15:55:08,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9344 states and 33247 transitions. [2021-06-05 15:55:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:08,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:08,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:08,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:08,681 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash 754595923, now seen corresponding path program 38 times [2021-06-05 15:55:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:08,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612744833] [2021-06-05 15:55:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:08,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612744833] [2021-06-05 15:55:08,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612744833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:08,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928730527] [2021-06-05 15:55:08,860 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 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 [2021-06-05 15:55:08,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:55:08,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:08,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:55:08,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:08,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:55:08,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:08,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:08,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:08,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:55:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:09,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:09,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:09,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:09,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:09,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:55:09,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:09,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 15:55:09,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:09,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:09,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:09,077 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-06-05 15:55:09,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:55:09,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:09,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:09,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:09,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 15:55:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:09,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928730527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:09,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:09,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 15:55:09,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090433740] [2021-06-05 15:55:09,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:55:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:55:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:55:09,175 INFO L87 Difference]: Start difference. First operand 9344 states and 33247 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:09,796 INFO L93 Difference]: Finished difference Result 14092 states and 49335 transitions. [2021-06-05 15:55:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:55:09,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:09,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:09,822 INFO L225 Difference]: With dead ends: 14092 [2021-06-05 15:55:09,822 INFO L226 Difference]: Without dead ends: 14065 [2021-06-05 15:55:09,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:55:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14065 states. [2021-06-05 15:55:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14065 to 9376. [2021-06-05 15:55:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9375 states have (on average 3.56064) internal successors, (33381), 9375 states have internal predecessors, (33381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 33381 transitions. [2021-06-05 15:55:10,018 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 33381 transitions. Word has length 30 [2021-06-05 15:55:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:10,018 INFO L482 AbstractCegarLoop]: Abstraction has 9376 states and 33381 transitions. [2021-06-05 15:55:10,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 33381 transitions. [2021-06-05 15:55:10,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:10,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:10,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:10,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 15:55:10,231 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash 426491389, now seen corresponding path program 39 times [2021-06-05 15:55:10,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:10,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59798848] [2021-06-05 15:55:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:10,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:10,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59798848] [2021-06-05 15:55:10,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59798848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:10,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490831334] [2021-06-05 15:55:10,365 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 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 [2021-06-05 15:55:10,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:55:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:55:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:10,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:55:10,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:10,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:55:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:10,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:10,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:10,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-06-05 15:55:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:55:10,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:10,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 15:55:10,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:10,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:48 [2021-06-05 15:55:10,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:55:10,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:10,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 15:55:10,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:10,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:10,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:55:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490831334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:10,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:10,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 15:55:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551444546] [2021-06-05 15:55:10,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:55:10,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:55:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:55:10,698 INFO L87 Difference]: Start difference. First operand 9376 states and 33381 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:11,179 INFO L93 Difference]: Finished difference Result 10286 states and 36204 transitions. [2021-06-05 15:55:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:55:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:11,194 INFO L225 Difference]: With dead ends: 10286 [2021-06-05 15:55:11,195 INFO L226 Difference]: Without dead ends: 10241 [2021-06-05 15:55:11,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:55:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-06-05 15:55:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 9498. [2021-06-05 15:55:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9498 states, 9497 states have (on average 3.555754448773297) internal successors, (33769), 9497 states have internal predecessors, (33769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9498 states to 9498 states and 33769 transitions. [2021-06-05 15:55:11,317 INFO L78 Accepts]: Start accepts. Automaton has 9498 states and 33769 transitions. Word has length 30 [2021-06-05 15:55:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:11,317 INFO L482 AbstractCegarLoop]: Abstraction has 9498 states and 33769 transitions. [2021-06-05 15:55:11,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 9498 states and 33769 transitions. [2021-06-05 15:55:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:11,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:11,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:11,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:11,529 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash -692303903, now seen corresponding path program 40 times [2021-06-05 15:55:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:11,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752741780] [2021-06-05 15:55:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:11,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752741780] [2021-06-05 15:55:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752741780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339701892] [2021-06-05 15:55:11,666 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 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 [2021-06-05 15:55:11,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:11,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:11,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:11,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:11,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:11,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:11,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:55:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:11,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 65 [2021-06-05 15:55:11,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 51 [2021-06-05 15:55:11,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:11,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:158, output treesize:57 [2021-06-05 15:55:11,913 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 15:55:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 15:55:11,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:11,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:11,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:8 [2021-06-05 15:55:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:11,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339701892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:11,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:11,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 15:55:11,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450495996] [2021-06-05 15:55:11,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:55:11,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:11,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:55:11,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:55:11,940 INFO L87 Difference]: Start difference. First operand 9498 states and 33769 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-06-05 15:55:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:12,276 INFO L93 Difference]: Finished difference Result 10001 states and 35300 transitions. [2021-06-05 15:55:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:55:12,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:12,291 INFO L225 Difference]: With dead ends: 10001 [2021-06-05 15:55:12,292 INFO L226 Difference]: Without dead ends: 9915 [2021-06-05 15:55:12,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:55:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2021-06-05 15:55:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 9551. [2021-06-05 15:55:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9551 states, 9550 states have (on average 3.553821989528796) internal successors, (33939), 9550 states have internal predecessors, (33939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9551 states to 9551 states and 33939 transitions. [2021-06-05 15:55:12,454 INFO L78 Accepts]: Start accepts. Automaton has 9551 states and 33939 transitions. Word has length 30 [2021-06-05 15:55:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:12,454 INFO L482 AbstractCegarLoop]: Abstraction has 9551 states and 33939 transitions. [2021-06-05 15:55:12,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-06-05 15:55:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9551 states and 33939 transitions. [2021-06-05 15:55:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:12,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:12,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:12,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:12,666 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:12,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1652951515, now seen corresponding path program 41 times [2021-06-05 15:55:12,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:12,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471594659] [2021-06-05 15:55:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:12,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471594659] [2021-06-05 15:55:12,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471594659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84808290] [2021-06-05 15:55:12,801 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 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 [2021-06-05 15:55:12,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:55:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:55:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:12,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:12,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 15:55:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:55:12,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:12,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 15:55:12,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:55:12,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 15:55:12,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:12,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:12,997 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:18 [2021-06-05 15:55:13,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:55:13,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:13,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:55:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:13,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84808290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:13,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:13,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:55:13,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132143153] [2021-06-05 15:55:13,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:55:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:55:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:55:13,056 INFO L87 Difference]: Start difference. First operand 9551 states and 33939 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 15:55:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:13,244 INFO L93 Difference]: Finished difference Result 10143 states and 35765 transitions. [2021-06-05 15:55:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:55:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:13,260 INFO L225 Difference]: With dead ends: 10143 [2021-06-05 15:55:13,260 INFO L226 Difference]: Without dead ends: 10110 [2021-06-05 15:55:13,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:55:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2021-06-05 15:55:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 9551. [2021-06-05 15:55:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9551 states, 9550 states have (on average 3.5575916230366493) internal successors, (33975), 9550 states have internal predecessors, (33975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9551 states to 9551 states and 33975 transitions. [2021-06-05 15:55:13,384 INFO L78 Accepts]: Start accepts. Automaton has 9551 states and 33975 transitions. Word has length 30 [2021-06-05 15:55:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:13,384 INFO L482 AbstractCegarLoop]: Abstraction has 9551 states and 33975 transitions. [2021-06-05 15:55:13,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 15:55:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9551 states and 33975 transitions. [2021-06-05 15:55:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:13,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:13,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:13,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:55:13,596 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash -75764163, now seen corresponding path program 42 times [2021-06-05 15:55:13,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:13,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456033987] [2021-06-05 15:55:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:13,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456033987] [2021-06-05 15:55:13,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456033987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:13,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728730728] [2021-06-05 15:55:13,696 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 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 [2021-06-05 15:55:13,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:55:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:13,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:13,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:13,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:13,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:13,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:13,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 15:55:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:55:13,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:13,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-06-05 15:55:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:55:13,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:13,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 15:55:13,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:13,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:13,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:55:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:13,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728730728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:13,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:13,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:55:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904712964] [2021-06-05 15:55:13,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:55:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:55:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:13,927 INFO L87 Difference]: Start difference. First operand 9551 states and 33975 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:14,196 INFO L93 Difference]: Finished difference Result 10221 states and 36103 transitions. [2021-06-05 15:55:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:55:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:14,212 INFO L225 Difference]: With dead ends: 10221 [2021-06-05 15:55:14,212 INFO L226 Difference]: Without dead ends: 10194 [2021-06-05 15:55:14,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10194 states. [2021-06-05 15:55:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10194 to 9614. [2021-06-05 15:55:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 3.5577863310100906) internal successors, (34201), 9613 states have internal predecessors, (34201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 34201 transitions. [2021-06-05 15:55:14,351 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 34201 transitions. Word has length 30 [2021-06-05 15:55:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:14,352 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 34201 transitions. [2021-06-05 15:55:14,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 34201 transitions. [2021-06-05 15:55:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:14,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:14,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:14,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 15:55:14,563 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1496215775, now seen corresponding path program 43 times [2021-06-05 15:55:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:14,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677408993] [2021-06-05 15:55:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:14,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677408993] [2021-06-05 15:55:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677408993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050410297] [2021-06-05 15:55:14,654 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 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 [2021-06-05 15:55:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:14,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:14,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:14,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:14,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:14,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 15:55:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 15:55:14,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:14,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-06-05 15:55:14,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:55:14,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:55:14,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:14,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:14,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 15:55:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:14,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050410297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:14,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:14,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:55:14,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041565285] [2021-06-05 15:55:14,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:55:14,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:14,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:55:14,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:14,903 INFO L87 Difference]: Start difference. First operand 9614 states and 34201 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:15,149 INFO L93 Difference]: Finished difference Result 10078 states and 35645 transitions. [2021-06-05 15:55:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:55:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:15,166 INFO L225 Difference]: With dead ends: 10078 [2021-06-05 15:55:15,166 INFO L226 Difference]: Without dead ends: 10030 [2021-06-05 15:55:15,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-05 15:55:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9683. [2021-06-05 15:55:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9683 states, 9682 states have (on average 3.5565998760586655) internal successors, (34435), 9682 states have internal predecessors, (34435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9683 states to 9683 states and 34435 transitions. [2021-06-05 15:55:15,331 INFO L78 Accepts]: Start accepts. Automaton has 9683 states and 34435 transitions. Word has length 30 [2021-06-05 15:55:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:15,331 INFO L482 AbstractCegarLoop]: Abstraction has 9683 states and 34435 transitions. [2021-06-05 15:55:15,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9683 states and 34435 transitions. [2021-06-05 15:55:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:15,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:15,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:15,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:55:15,543 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1778933477, now seen corresponding path program 44 times [2021-06-05 15:55:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:15,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141765740] [2021-06-05 15:55:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:15,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:15,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141765740] [2021-06-05 15:55:15,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141765740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:15,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853547049] [2021-06-05 15:55:15,642 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 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 [2021-06-05 15:55:15,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:55:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:15,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:55:15,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:15,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:55:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:15,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:15,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:15,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 15:55:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:55:15,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:15,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 15:55:15,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:15,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,850 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:22 [2021-06-05 15:55:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:55:15,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:15,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:15,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:55:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:15,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853547049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:15,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:15,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:55:15,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963237305] [2021-06-05 15:55:15,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:55:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:15,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:55:15,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:15,890 INFO L87 Difference]: Start difference. First operand 9683 states and 34435 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-06-05 15:55:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:16,098 INFO L93 Difference]: Finished difference Result 10375 states and 36626 transitions. [2021-06-05 15:55:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:55:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:16,115 INFO L225 Difference]: With dead ends: 10375 [2021-06-05 15:55:16,115 INFO L226 Difference]: Without dead ends: 10348 [2021-06-05 15:55:16,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2021-06-05 15:55:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 9706. [2021-06-05 15:55:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 9705 states have (on average 3.55919629057187) internal successors, (34542), 9705 states have internal predecessors, (34542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 34542 transitions. [2021-06-05 15:55:16,254 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 34542 transitions. Word has length 30 [2021-06-05 15:55:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:16,254 INFO L482 AbstractCegarLoop]: Abstraction has 9706 states and 34542 transitions. [2021-06-05 15:55:16,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-06-05 15:55:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 34542 transitions. [2021-06-05 15:55:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:16,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:16,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:16,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:16,467 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1731377819, now seen corresponding path program 45 times [2021-06-05 15:55:16,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:16,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569593748] [2021-06-05 15:55:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:16,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569593748] [2021-06-05 15:55:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569593748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374104597] [2021-06-05 15:55:16,558 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 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 [2021-06-05 15:55:16,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:55:16,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:55:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:16,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:16,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:16,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:16,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:16,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:16,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:16,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:16,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:55:16,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:16,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 15:55:16,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:16,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:16,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:16,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:174 [2021-06-05 15:55:16,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:55:16,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:17,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:17,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:55:17,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:17,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:17,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:17,005 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 15:55:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:17,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374104597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:17,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:17,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-05 15:55:17,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476254372] [2021-06-05 15:55:17,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:55:17,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:17,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:55:17,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:55:17,022 INFO L87 Difference]: Start difference. First operand 9706 states and 34542 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:17,821 INFO L93 Difference]: Finished difference Result 10239 states and 36151 transitions. [2021-06-05 15:55:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:55:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:17,838 INFO L225 Difference]: With dead ends: 10239 [2021-06-05 15:55:17,838 INFO L226 Difference]: Without dead ends: 10212 [2021-06-05 15:55:17,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:55:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10212 states. [2021-06-05 15:55:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10212 to 9765. [2021-06-05 15:55:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 3.557455960671856) internal successors, (34735), 9764 states have internal predecessors, (34735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 34735 transitions. [2021-06-05 15:55:18,026 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 34735 transitions. Word has length 30 [2021-06-05 15:55:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:18,026 INFO L482 AbstractCegarLoop]: Abstraction has 9765 states and 34735 transitions. [2021-06-05 15:55:18,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 34735 transitions. [2021-06-05 15:55:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:18,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:18,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:18,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:18,239 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash 711559775, now seen corresponding path program 46 times [2021-06-05 15:55:18,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:18,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635662419] [2021-06-05 15:55:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:18,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:18,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635662419] [2021-06-05 15:55:18,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635662419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:18,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178610915] [2021-06-05 15:55:18,330 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 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 [2021-06-05 15:55:18,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:18,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:55:18,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:18,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:55:18,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:18,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:55:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:18,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:18,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 15:55:18,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:55:18,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:18,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:55:18,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:18,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:22 [2021-06-05 15:55:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:55:18,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:18,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:18,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-06-05 15:55:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:18,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178610915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:18,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:18,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:55:18,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400954748] [2021-06-05 15:55:18,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:55:18,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:55:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:18,550 INFO L87 Difference]: Start difference. First operand 9765 states and 34735 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-06-05 15:55:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:18,849 INFO L93 Difference]: Finished difference Result 10176 states and 36011 transitions. [2021-06-05 15:55:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:55:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:18,866 INFO L225 Difference]: With dead ends: 10176 [2021-06-05 15:55:18,866 INFO L226 Difference]: Without dead ends: 10098 [2021-06-05 15:55:18,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10098 states. [2021-06-05 15:55:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10098 to 9794. [2021-06-05 15:55:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9794 states, 9793 states have (on average 3.557643214540999) internal successors, (34840), 9793 states have internal predecessors, (34840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9794 states to 9794 states and 34840 transitions. [2021-06-05 15:55:19,007 INFO L78 Accepts]: Start accepts. Automaton has 9794 states and 34840 transitions. Word has length 30 [2021-06-05 15:55:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:19,007 INFO L482 AbstractCegarLoop]: Abstraction has 9794 states and 34840 transitions. [2021-06-05 15:55:19,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-06-05 15:55:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9794 states and 34840 transitions. [2021-06-05 15:55:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:55:19,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:19,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:19,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 15:55:19,219 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:19,220 INFO L82 PathProgramCache]: Analyzing trace with hash -11649061, now seen corresponding path program 47 times [2021-06-05 15:55:19,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:19,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896168262] [2021-06-05 15:55:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:19,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:19,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896168262] [2021-06-05 15:55:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896168262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:19,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199308349] [2021-06-05 15:55:19,308 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 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 [2021-06-05 15:55:19,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:55:19,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 15:55:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:19,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:55:19,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:19,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:55:19,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:19,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:55:19,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:19,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 15:55:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:55:19,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:19,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:55:19,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 15:55:19,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:55:19,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:35 [2021-06-05 15:55:19,704 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 15:55:19,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 99 [2021-06-05 15:55:19,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,752 INFO L628 ElimStorePlain]: treesize reduction 43, result has 51.7 percent of original size [2021-06-05 15:55:19,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:55:19,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:103, output treesize:36 [2021-06-05 15:55:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:19,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199308349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:19,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:19,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-05 15:55:19,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937705220] [2021-06-05 15:55:19,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:55:19,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:19,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:55:19,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:55:19,799 INFO L87 Difference]: Start difference. First operand 9794 states and 34840 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:20,610 INFO L93 Difference]: Finished difference Result 10637 states and 37249 transitions. [2021-06-05 15:55:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:55:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:55:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:20,627 INFO L225 Difference]: With dead ends: 10637 [2021-06-05 15:55:20,627 INFO L226 Difference]: Without dead ends: 10595 [2021-06-05 15:55:20,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:55:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10595 states. [2021-06-05 15:55:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10595 to 9858. [2021-06-05 15:55:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9857 states have (on average 3.555645733996145) internal successors, (35048), 9857 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 35048 transitions. [2021-06-05 15:55:20,834 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 35048 transitions. Word has length 30 [2021-06-05 15:55:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:20,834 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 35048 transitions. [2021-06-05 15:55:20,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 35048 transitions. [2021-06-05 15:55:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:20,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:20,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:21,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:21,047 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2006063557, now seen corresponding path program 48 times [2021-06-05 15:55:21,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:21,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949829055] [2021-06-05 15:55:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:21,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949829055] [2021-06-05 15:55:21,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949829055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932752394] [2021-06-05 15:55:21,071 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 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 [2021-06-05 15:55:21,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:55:21,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:21,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932752394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:21,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:21,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:55:21,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354686992] [2021-06-05 15:55:21,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:55:21,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:21,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:55:21,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:55:21,138 INFO L87 Difference]: Start difference. First operand 9858 states and 35048 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-06-05 15:55:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:21,316 INFO L93 Difference]: Finished difference Result 16874 states and 58768 transitions. [2021-06-05 15:55:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:55:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 32 [2021-06-05 15:55:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:21,347 INFO L225 Difference]: With dead ends: 16874 [2021-06-05 15:55:21,348 INFO L226 Difference]: Without dead ends: 16495 [2021-06-05 15:55:21,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:55:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16495 states. [2021-06-05 15:55:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16495 to 10848. [2021-06-05 15:55:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 3.5587720106942013) internal successors, (38602), 10847 states have internal predecessors, (38602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 38602 transitions. [2021-06-05 15:55:21,554 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 38602 transitions. Word has length 32 [2021-06-05 15:55:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:21,554 INFO L482 AbstractCegarLoop]: Abstraction has 10848 states and 38602 transitions. [2021-06-05 15:55:21,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-06-05 15:55:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 38602 transitions. [2021-06-05 15:55:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:21,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:21,568 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:21,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 15:55:21,784 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -922435785, now seen corresponding path program 49 times [2021-06-05 15:55:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:21,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982780328] [2021-06-05 15:55:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:21,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:21,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982780328] [2021-06-05 15:55:21,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982780328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:21,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495488010] [2021-06-05 15:55:21,814 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 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 [2021-06-05 15:55:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:21,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495488010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:21,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:21,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 15:55:21,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488209223] [2021-06-05 15:55:21,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:55:21,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:55:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:55:21,894 INFO L87 Difference]: Start difference. First operand 10848 states and 38602 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:23,121 INFO L93 Difference]: Finished difference Result 32555 states and 110833 transitions. [2021-06-05 15:55:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 15:55:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:23,186 INFO L225 Difference]: With dead ends: 32555 [2021-06-05 15:55:23,187 INFO L226 Difference]: Without dead ends: 32435 [2021-06-05 15:55:23,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=1615, Invalid=6757, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:55:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32435 states. [2021-06-05 15:55:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32435 to 20924. [2021-06-05 15:55:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20924 states, 20923 states have (on average 3.6632892032691298) internal successors, (76647), 20923 states have internal predecessors, (76647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20924 states to 20924 states and 76647 transitions. [2021-06-05 15:55:23,629 INFO L78 Accepts]: Start accepts. Automaton has 20924 states and 76647 transitions. Word has length 32 [2021-06-05 15:55:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:23,629 INFO L482 AbstractCegarLoop]: Abstraction has 20924 states and 76647 transitions. [2021-06-05 15:55:23,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20924 states and 76647 transitions. [2021-06-05 15:55:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:23,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:23,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:23,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:23,853 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1162824845, now seen corresponding path program 50 times [2021-06-05 15:55:23,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:23,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394862439] [2021-06-05 15:55:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:23,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:23,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394862439] [2021-06-05 15:55:23,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394862439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:23,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371834732] [2021-06-05 15:55:23,881 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 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 [2021-06-05 15:55:23,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:55:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:23,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371834732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:23,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:23,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 15:55:23,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456236674] [2021-06-05 15:55:23,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:55:23,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:23,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:55:23,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:55:23,953 INFO L87 Difference]: Start difference. First operand 20924 states and 76647 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:24,512 INFO L93 Difference]: Finished difference Result 36426 states and 126416 transitions. [2021-06-05 15:55:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:55:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:24,582 INFO L225 Difference]: With dead ends: 36426 [2021-06-05 15:55:24,583 INFO L226 Difference]: Without dead ends: 36162 [2021-06-05 15:55:24,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:55:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36162 states. [2021-06-05 15:55:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36162 to 25764. [2021-06-05 15:55:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25764 states, 25763 states have (on average 3.710243372278073) internal successors, (95587), 25763 states have internal predecessors, (95587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25764 states to 25764 states and 95587 transitions. [2021-06-05 15:55:25,322 INFO L78 Accepts]: Start accepts. Automaton has 25764 states and 95587 transitions. Word has length 32 [2021-06-05 15:55:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:25,322 INFO L482 AbstractCegarLoop]: Abstraction has 25764 states and 95587 transitions. [2021-06-05 15:55:25,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 25764 states and 95587 transitions. [2021-06-05 15:55:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:25,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:25,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:25,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 15:55:25,553 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1268490291, now seen corresponding path program 51 times [2021-06-05 15:55:25,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:25,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775098277] [2021-06-05 15:55:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:55:25,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:25,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775098277] [2021-06-05 15:55:25,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775098277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:25,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972578390] [2021-06-05 15:55:25,575 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 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 [2021-06-05 15:55:25,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:55:25,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:25,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:25,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972578390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:25,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:25,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:55:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081681819] [2021-06-05 15:55:25,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:55:25,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:25,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:55:25,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:55:25,671 INFO L87 Difference]: Start difference. First operand 25764 states and 95587 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:26,790 INFO L93 Difference]: Finished difference Result 69065 states and 243117 transitions. [2021-06-05 15:55:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:55:26,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:26,940 INFO L225 Difference]: With dead ends: 69065 [2021-06-05 15:55:26,940 INFO L226 Difference]: Without dead ends: 68261 [2021-06-05 15:55:26,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=1052, Invalid=3108, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:55:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68261 states. [2021-06-05 15:55:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68261 to 42547. [2021-06-05 15:55:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42547 states, 42546 states have (on average 3.6763267992290696) internal successors, (156413), 42546 states have internal predecessors, (156413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42547 states to 42547 states and 156413 transitions. [2021-06-05 15:55:28,035 INFO L78 Accepts]: Start accepts. Automaton has 42547 states and 156413 transitions. Word has length 32 [2021-06-05 15:55:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:28,035 INFO L482 AbstractCegarLoop]: Abstraction has 42547 states and 156413 transitions. [2021-06-05 15:55:28,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42547 states and 156413 transitions. [2021-06-05 15:55:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:28,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:28,260 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:28,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:55:28,461 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1584127903, now seen corresponding path program 52 times [2021-06-05 15:55:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:28,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386533857] [2021-06-05 15:55:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:28,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386533857] [2021-06-05 15:55:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386533857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853628260] [2021-06-05 15:55:28,487 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 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 [2021-06-05 15:55:28,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:28,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:28,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853628260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:28,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:28,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 15:55:28,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51933136] [2021-06-05 15:55:28,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:55:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:55:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:55:28,564 INFO L87 Difference]: Start difference. First operand 42547 states and 156413 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:29,678 INFO L93 Difference]: Finished difference Result 90436 states and 320892 transitions. [2021-06-05 15:55:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:55:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:29,987 INFO L225 Difference]: With dead ends: 90436 [2021-06-05 15:55:29,988 INFO L226 Difference]: Without dead ends: 89450 [2021-06-05 15:55:29,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:55:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89450 states. [2021-06-05 15:55:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89450 to 67176. [2021-06-05 15:55:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67176 states, 67175 states have (on average 3.7046669147748417) internal successors, (248861), 67175 states have internal predecessors, (248861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67176 states to 67176 states and 248861 transitions. [2021-06-05 15:55:31,899 INFO L78 Accepts]: Start accepts. Automaton has 67176 states and 248861 transitions. Word has length 32 [2021-06-05 15:55:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:31,899 INFO L482 AbstractCegarLoop]: Abstraction has 67176 states and 248861 transitions. [2021-06-05 15:55:31,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 67176 states and 248861 transitions. [2021-06-05 15:55:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:32,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:32,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:32,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:32,205 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1338853791, now seen corresponding path program 53 times [2021-06-05 15:55:32,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:32,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257508869] [2021-06-05 15:55:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:32,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257508869] [2021-06-05 15:55:32,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257508869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629848490] [2021-06-05 15:55:32,235 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 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 [2021-06-05 15:55:32,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:55:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:32,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629848490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:32,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:32,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:55:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870916464] [2021-06-05 15:55:32,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:55:32,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:55:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:55:32,322 INFO L87 Difference]: Start difference. First operand 67176 states and 248861 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:33,922 INFO L93 Difference]: Finished difference Result 104051 states and 366057 transitions. [2021-06-05 15:55:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:55:33,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:34,211 INFO L225 Difference]: With dead ends: 104051 [2021-06-05 15:55:34,211 INFO L226 Difference]: Without dead ends: 103909 [2021-06-05 15:55:34,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:55:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103909 states. [2021-06-05 15:55:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103909 to 54491. [2021-06-05 15:55:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54491 states, 54490 states have (on average 3.6740686364470547) internal successors, (200200), 54490 states have internal predecessors, (200200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54491 states to 54491 states and 200200 transitions. [2021-06-05 15:55:35,983 INFO L78 Accepts]: Start accepts. Automaton has 54491 states and 200200 transitions. Word has length 32 [2021-06-05 15:55:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:35,983 INFO L482 AbstractCegarLoop]: Abstraction has 54491 states and 200200 transitions. [2021-06-05 15:55:35,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 54491 states and 200200 transitions. [2021-06-05 15:55:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:36,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:36,041 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:36,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:36,257 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash -322114183, now seen corresponding path program 54 times [2021-06-05 15:55:36,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:36,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811406836] [2021-06-05 15:55:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:55:36,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:36,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811406836] [2021-06-05 15:55:36,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811406836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:36,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515629670] [2021-06-05 15:55:36,281 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 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 [2021-06-05 15:55:36,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:55:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:55:36,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515629670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:36,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:36,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-06-05 15:55:36,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916139603] [2021-06-05 15:55:36,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:55:36,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:55:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:55:36,341 INFO L87 Difference]: Start difference. First operand 54491 states and 200200 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2021-06-05 15:55:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:36,796 INFO L93 Difference]: Finished difference Result 64576 states and 234215 transitions. [2021-06-05 15:55:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:55:36,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) Word has length 32 [2021-06-05 15:55:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:36,942 INFO L225 Difference]: With dead ends: 64576 [2021-06-05 15:55:36,942 INFO L226 Difference]: Without dead ends: 64513 [2021-06-05 15:55:36,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:55:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64513 states. [2021-06-05 15:55:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64513 to 59411. [2021-06-05 15:55:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59411 states, 59410 states have (on average 3.689917522302643) internal successors, (219218), 59410 states have internal predecessors, (219218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59411 states to 59411 states and 219218 transitions. [2021-06-05 15:55:38,286 INFO L78 Accepts]: Start accepts. Automaton has 59411 states and 219218 transitions. Word has length 32 [2021-06-05 15:55:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:38,286 INFO L482 AbstractCegarLoop]: Abstraction has 59411 states and 219218 transitions. [2021-06-05 15:55:38,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2021-06-05 15:55:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 59411 states and 219218 transitions. [2021-06-05 15:55:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:38,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:38,339 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:38,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:38,539 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1894696903, now seen corresponding path program 55 times [2021-06-05 15:55:38,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:38,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648360528] [2021-06-05 15:55:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:38,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:38,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648360528] [2021-06-05 15:55:38,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648360528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:38,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633005912] [2021-06-05 15:55:38,564 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 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 [2021-06-05 15:55:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:55:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:38,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633005912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:38,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:38,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 15:55:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19592961] [2021-06-05 15:55:38,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:55:38,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:55:38,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:55:38,830 INFO L87 Difference]: Start difference. First operand 59411 states and 219218 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:39,438 INFO L93 Difference]: Finished difference Result 85962 states and 317367 transitions. [2021-06-05 15:55:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:55:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:39,667 INFO L225 Difference]: With dead ends: 85962 [2021-06-05 15:55:39,667 INFO L226 Difference]: Without dead ends: 85673 [2021-06-05 15:55:39,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:55:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85673 states. [2021-06-05 15:55:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85673 to 49594. [2021-06-05 15:55:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49594 states, 49593 states have (on average 3.677273002238219) internal successors, (182367), 49593 states have internal predecessors, (182367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49594 states to 49594 states and 182367 transitions. [2021-06-05 15:55:41,169 INFO L78 Accepts]: Start accepts. Automaton has 49594 states and 182367 transitions. Word has length 32 [2021-06-05 15:55:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:41,169 INFO L482 AbstractCegarLoop]: Abstraction has 49594 states and 182367 transitions. [2021-06-05 15:55:41,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49594 states and 182367 transitions. [2021-06-05 15:55:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:41,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:41,214 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:41,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 15:55:41,414 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 166970331, now seen corresponding path program 56 times [2021-06-05 15:55:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:41,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176641509] [2021-06-05 15:55:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:41,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:41,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176641509] [2021-06-05 15:55:41,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176641509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:41,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148659461] [2021-06-05 15:55:41,436 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:55:41,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:55:41,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:41,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148659461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:41,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:41,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 15:55:41,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866383213] [2021-06-05 15:55:41,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:55:41,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:55:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:55:41,517 INFO L87 Difference]: Start difference. First operand 49594 states and 182367 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:42,961 INFO L93 Difference]: Finished difference Result 76773 states and 266045 transitions. [2021-06-05 15:55:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:55:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:43,127 INFO L225 Difference]: With dead ends: 76773 [2021-06-05 15:55:43,127 INFO L226 Difference]: Without dead ends: 76379 [2021-06-05 15:55:43,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=1342, Invalid=4978, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:55:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76379 states. [2021-06-05 15:55:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76379 to 41102. [2021-06-05 15:55:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41102 states, 41101 states have (on average 3.63954648305394) internal successors, (149589), 41101 states have internal predecessors, (149589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41102 states to 41102 states and 149589 transitions. [2021-06-05 15:55:44,366 INFO L78 Accepts]: Start accepts. Automaton has 41102 states and 149589 transitions. Word has length 32 [2021-06-05 15:55:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:44,366 INFO L482 AbstractCegarLoop]: Abstraction has 41102 states and 149589 transitions. [2021-06-05 15:55:44,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41102 states and 149589 transitions. [2021-06-05 15:55:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:44,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:44,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:44,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:44,829 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1382004005, now seen corresponding path program 57 times [2021-06-05 15:55:44,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:44,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198992422] [2021-06-05 15:55:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:44,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198992422] [2021-06-05 15:55:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198992422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299984443] [2021-06-05 15:55:44,866 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 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 [2021-06-05 15:55:44,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:55:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:55:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:44,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299984443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:44,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:44,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 15:55:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196222585] [2021-06-05 15:55:44,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:55:44,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:44,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:55:44,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:55:44,948 INFO L87 Difference]: Start difference. First operand 41102 states and 149589 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:45,700 INFO L93 Difference]: Finished difference Result 79772 states and 285940 transitions. [2021-06-05 15:55:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:55:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:55:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:45,880 INFO L225 Difference]: With dead ends: 79772 [2021-06-05 15:55:45,880 INFO L226 Difference]: Without dead ends: 79454 [2021-06-05 15:55:45,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=513, Invalid=1557, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:55:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79454 states. [2021-06-05 15:55:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79454 to 60404. [2021-06-05 15:55:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60404 states, 60403 states have (on average 3.6763736900485076) internal successors, (222064), 60403 states have internal predecessors, (222064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60404 states to 60404 states and 222064 transitions. [2021-06-05 15:55:47,426 INFO L78 Accepts]: Start accepts. Automaton has 60404 states and 222064 transitions. Word has length 32 [2021-06-05 15:55:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:47,426 INFO L482 AbstractCegarLoop]: Abstraction has 60404 states and 222064 transitions. [2021-06-05 15:55:47,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 60404 states and 222064 transitions. [2021-06-05 15:55:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:47,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:47,482 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:47,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 15:55:47,683 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash 181653621, now seen corresponding path program 58 times [2021-06-05 15:55:47,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:47,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3943788] [2021-06-05 15:55:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:47,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:47,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3943788] [2021-06-05 15:55:47,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3943788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:47,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100993861] [2021-06-05 15:55:47,714 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 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 [2021-06-05 15:55:47,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:55:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:47,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:47,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100993861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:47,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:47,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:55:47,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458418518] [2021-06-05 15:55:47,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:55:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:55:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:55:47,770 INFO L87 Difference]: Start difference. First operand 60404 states and 222064 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-06-05 15:55:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:48,438 INFO L93 Difference]: Finished difference Result 77437 states and 280743 transitions. [2021-06-05 15:55:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:55:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) Word has length 32 [2021-06-05 15:55:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:48,634 INFO L225 Difference]: With dead ends: 77437 [2021-06-05 15:55:48,635 INFO L226 Difference]: Without dead ends: 77435 [2021-06-05 15:55:48,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:55:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77435 states. [2021-06-05 15:55:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77435 to 71881. [2021-06-05 15:55:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71881 states, 71880 states have (on average 3.682039510294936) internal successors, (264665), 71880 states have internal predecessors, (264665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71881 states to 71881 states and 264665 transitions. [2021-06-05 15:55:50,266 INFO L78 Accepts]: Start accepts. Automaton has 71881 states and 264665 transitions. Word has length 32 [2021-06-05 15:55:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:50,266 INFO L482 AbstractCegarLoop]: Abstraction has 71881 states and 264665 transitions. [2021-06-05 15:55:50,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-06-05 15:55:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 71881 states and 264665 transitions. [2021-06-05 15:55:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:55:50,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:50,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:50,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:50,833 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash 991552283, now seen corresponding path program 59 times [2021-06-05 15:55:50,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:50,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849809564] [2021-06-05 15:55:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:50,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:50,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849809564] [2021-06-05 15:55:50,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849809564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:50,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076508806] [2021-06-05 15:55:50,857 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 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 [2021-06-05 15:55:50,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:55:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:55:50,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076508806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:50,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:50,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-06-05 15:55:50,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751991608] [2021-06-05 15:55:50,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:55:50,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:50,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:55:50,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:55:50,932 INFO L87 Difference]: Start difference. First operand 71881 states and 264665 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-06-05 15:55:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:51,355 INFO L93 Difference]: Finished difference Result 77204 states and 280346 transitions. [2021-06-05 15:55:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:55:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) Word has length 32 [2021-06-05 15:55:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:51,527 INFO L225 Difference]: With dead ends: 77204 [2021-06-05 15:55:51,527 INFO L226 Difference]: Without dead ends: 77155 [2021-06-05 15:55:51,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:55:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77155 states. [2021-06-05 15:55:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77155 to 71519. [2021-06-05 15:55:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71519 states, 71518 states have (on average 3.6742917866830727) internal successors, (262778), 71518 states have internal predecessors, (262778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71519 states to 71519 states and 262778 transitions. [2021-06-05 15:55:53,320 INFO L78 Accepts]: Start accepts. Automaton has 71519 states and 262778 transitions. Word has length 32 [2021-06-05 15:55:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:53,320 INFO L482 AbstractCegarLoop]: Abstraction has 71519 states and 262778 transitions. [2021-06-05 15:55:53,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-06-05 15:55:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71519 states and 262778 transitions. [2021-06-05 15:55:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:55:53,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:53,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:53,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 15:55:53,596 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:53,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1332964561, now seen corresponding path program 60 times [2021-06-05 15:55:53,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:53,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909550965] [2021-06-05 15:55:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:55:53,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909550965] [2021-06-05 15:55:53,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909550965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232273902] [2021-06-05 15:55:53,622 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 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 [2021-06-05 15:55:53,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:55:53,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:55:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:55:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:55:53,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232273902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:53,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:53,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:55:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24207221] [2021-06-05 15:55:53,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:55:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:55:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:55:53,699 INFO L87 Difference]: Start difference. First operand 71519 states and 262778 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:54,666 INFO L93 Difference]: Finished difference Result 105298 states and 389274 transitions. [2021-06-05 15:55:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:55:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:55:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:54,946 INFO L225 Difference]: With dead ends: 105298 [2021-06-05 15:55:54,947 INFO L226 Difference]: Without dead ends: 103045 [2021-06-05 15:55:54,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:55:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103045 states. [2021-06-05 15:55:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103045 to 86965. [2021-06-05 15:55:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86965 states, 86964 states have (on average 3.617197920978796) internal successors, (314566), 86964 states have internal predecessors, (314566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86965 states to 86965 states and 314566 transitions. [2021-06-05 15:55:57,155 INFO L78 Accepts]: Start accepts. Automaton has 86965 states and 314566 transitions. Word has length 33 [2021-06-05 15:55:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:55:57,155 INFO L482 AbstractCegarLoop]: Abstraction has 86965 states and 314566 transitions. [2021-06-05 15:55:57,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 86965 states and 314566 transitions. [2021-06-05 15:55:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:55:57,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:55:57,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:55:57,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:55:57,434 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:55:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:55:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1963622161, now seen corresponding path program 61 times [2021-06-05 15:55:57,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:55:57,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025029678] [2021-06-05 15:55:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:55:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:55:57,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:55:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025029678] [2021-06-05 15:55:57,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025029678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992217373] [2021-06-05 15:55:57,463 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 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 [2021-06-05 15:55:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:55:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:55:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:55:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:55:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992217373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:55:57,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:55:57,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:55:57,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943310398] [2021-06-05 15:55:57,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:55:57,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:55:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:55:57,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:55:57,527 INFO L87 Difference]: Start difference. First operand 86965 states and 314566 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:55:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:55:58,647 INFO L93 Difference]: Finished difference Result 144970 states and 524298 transitions. [2021-06-05 15:55:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:55:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:55:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:55:59,059 INFO L225 Difference]: With dead ends: 144970 [2021-06-05 15:55:59,059 INFO L226 Difference]: Without dead ends: 142308 [2021-06-05 15:55:59,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:55:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142308 states. [2021-06-05 15:56:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142308 to 139263. [2021-06-05 15:56:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139263 states, 139262 states have (on average 3.584818543464836) internal successors, (499229), 139262 states have internal predecessors, (499229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139263 states to 139263 states and 499229 transitions. [2021-06-05 15:56:02,627 INFO L78 Accepts]: Start accepts. Automaton has 139263 states and 499229 transitions. Word has length 33 [2021-06-05 15:56:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:02,627 INFO L482 AbstractCegarLoop]: Abstraction has 139263 states and 499229 transitions. [2021-06-05 15:56:02,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 139263 states and 499229 transitions. [2021-06-05 15:56:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:56:02,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:02,744 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:02,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:56:02,945 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:02,945 INFO L82 PathProgramCache]: Analyzing trace with hash -583238421, now seen corresponding path program 62 times [2021-06-05 15:56:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:02,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379348451] [2021-06-05 15:56:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:02,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379348451] [2021-06-05 15:56:02,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379348451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693021225] [2021-06-05 15:56:02,983 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:56:03,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:03,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693021225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:03,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:03,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 15:56:03,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645940683] [2021-06-05 15:56:03,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:56:03,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:03,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:56:03,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:56:03,071 INFO L87 Difference]: Start difference. First operand 139263 states and 499229 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:04,379 INFO L93 Difference]: Finished difference Result 56045 states and 202411 transitions. [2021-06-05 15:56:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:56:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:56:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:04,531 INFO L225 Difference]: With dead ends: 56045 [2021-06-05 15:56:04,532 INFO L226 Difference]: Without dead ends: 55994 [2021-06-05 15:56:04,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:56:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55994 states. [2021-06-05 15:56:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55994 to 39026. [2021-06-05 15:56:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39026 states, 39025 states have (on average 3.7087251761691222) internal successors, (144733), 39025 states have internal predecessors, (144733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39026 states to 39026 states and 144733 transitions. [2021-06-05 15:56:05,697 INFO L78 Accepts]: Start accepts. Automaton has 39026 states and 144733 transitions. Word has length 33 [2021-06-05 15:56:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:05,697 INFO L482 AbstractCegarLoop]: Abstraction has 39026 states and 144733 transitions. [2021-06-05 15:56:05,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39026 states and 144733 transitions. [2021-06-05 15:56:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:56:05,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:05,744 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:05,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:56:05,953 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1120487123, now seen corresponding path program 63 times [2021-06-05 15:56:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074014261] [2021-06-05 15:56:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:05,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:05,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074014261] [2021-06-05 15:56:05,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074014261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:05,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111521195] [2021-06-05 15:56:05,982 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 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 [2021-06-05 15:56:06,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:56:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:56:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:06,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111521195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:06,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:06,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 15:56:06,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316060706] [2021-06-05 15:56:06,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:56:06,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:56:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:56:06,056 INFO L87 Difference]: Start difference. First operand 39026 states and 144733 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:06,714 INFO L93 Difference]: Finished difference Result 60961 states and 207837 transitions. [2021-06-05 15:56:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:56:06,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:56:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:06,843 INFO L225 Difference]: With dead ends: 60961 [2021-06-05 15:56:06,843 INFO L226 Difference]: Without dead ends: 60725 [2021-06-05 15:56:06,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=472, Invalid=1168, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:56:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60725 states. [2021-06-05 15:56:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60725 to 45876. [2021-06-05 15:56:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45876 states, 45875 states have (on average 3.6203378746594006) internal successors, (166083), 45875 states have internal predecessors, (166083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45876 states to 45876 states and 166083 transitions. [2021-06-05 15:56:07,938 INFO L78 Accepts]: Start accepts. Automaton has 45876 states and 166083 transitions. Word has length 35 [2021-06-05 15:56:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:07,939 INFO L482 AbstractCegarLoop]: Abstraction has 45876 states and 166083 transitions. [2021-06-05 15:56:07,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 45876 states and 166083 transitions. [2021-06-05 15:56:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:56:07,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:07,989 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:08,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:56:08,190 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1613967111, now seen corresponding path program 64 times [2021-06-05 15:56:08,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:08,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235366186] [2021-06-05 15:56:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235366186] [2021-06-05 15:56:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235366186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450289468] [2021-06-05 15:56:08,221 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 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 [2021-06-05 15:56:08,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:08,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:56:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:08,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450289468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:08,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:08,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:56:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720249722] [2021-06-05 15:56:08,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:56:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:56:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:56:08,288 INFO L87 Difference]: Start difference. First operand 45876 states and 166083 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:08,760 INFO L93 Difference]: Finished difference Result 46845 states and 168585 transitions. [2021-06-05 15:56:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:56:08,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:56:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:08,854 INFO L225 Difference]: With dead ends: 46845 [2021-06-05 15:56:08,854 INFO L226 Difference]: Without dead ends: 46685 [2021-06-05 15:56:08,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:56:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46685 states. [2021-06-05 15:56:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46685 to 42613. [2021-06-05 15:56:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42613 states, 42612 states have (on average 3.623204731061673) internal successors, (154392), 42612 states have internal predecessors, (154392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42613 states to 42613 states and 154392 transitions. [2021-06-05 15:56:09,874 INFO L78 Accepts]: Start accepts. Automaton has 42613 states and 154392 transitions. Word has length 35 [2021-06-05 15:56:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:09,874 INFO L482 AbstractCegarLoop]: Abstraction has 42613 states and 154392 transitions. [2021-06-05 15:56:09,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42613 states and 154392 transitions. [2021-06-05 15:56:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:56:09,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:09,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:10,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:56:10,130 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2034748909, now seen corresponding path program 65 times [2021-06-05 15:56:10,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:10,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351300067] [2021-06-05 15:56:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351300067] [2021-06-05 15:56:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351300067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34024990] [2021-06-05 15:56:10,157 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 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 [2021-06-05 15:56:10,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:56:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:56:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:10,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34024990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:10,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:10,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:56:10,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032485583] [2021-06-05 15:56:10,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:56:10,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:56:10,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:56:10,266 INFO L87 Difference]: Start difference. First operand 42613 states and 154392 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:11,164 INFO L93 Difference]: Finished difference Result 60644 states and 212444 transitions. [2021-06-05 15:56:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:56:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:56:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:11,295 INFO L225 Difference]: With dead ends: 60644 [2021-06-05 15:56:11,295 INFO L226 Difference]: Without dead ends: 60532 [2021-06-05 15:56:11,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=576, Invalid=1776, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:56:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-06-05 15:56:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 52870. [2021-06-05 15:56:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52870 states, 52869 states have (on average 3.577162420321928) internal successors, (189121), 52869 states have internal predecessors, (189121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52870 states to 52870 states and 189121 transitions. [2021-06-05 15:56:12,387 INFO L78 Accepts]: Start accepts. Automaton has 52870 states and 189121 transitions. Word has length 35 [2021-06-05 15:56:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:12,388 INFO L482 AbstractCegarLoop]: Abstraction has 52870 states and 189121 transitions. [2021-06-05 15:56:12,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 52870 states and 189121 transitions. [2021-06-05 15:56:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:12,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:12,449 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:12,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:56:12,650 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash -687128601, now seen corresponding path program 66 times [2021-06-05 15:56:12,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:12,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277239976] [2021-06-05 15:56:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:12,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:12,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277239976] [2021-06-05 15:56:12,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277239976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:12,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143125575] [2021-06-05 15:56:12,984 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 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 [2021-06-05 15:56:13,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:56:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:13,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:56:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:13,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:56:13,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:13,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:13,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:69 [2021-06-05 15:56:13,537 INFO L354 Elim1Store]: treesize reduction 78, result has 12.4 percent of original size [2021-06-05 15:56:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 130 [2021-06-05 15:56:13,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:13,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:13,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:181, output treesize:73 [2021-06-05 15:56:13,801 INFO L446 ElimStorePlain]: Different costs {0=[v_C_77], 7=[A, B]} [2021-06-05 15:56:13,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 15:56:13,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:13,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:13,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2021-06-05 15:56:13,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:13,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 26 [2021-06-05 15:56:13,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:13,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:86, output treesize:33 [2021-06-05 15:56:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:56:13,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:13,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:13,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-06-05 15:56:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:13,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143125575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:13,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:13,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 15:56:13,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167819359] [2021-06-05 15:56:13,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:56:13,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:13,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:56:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:56:13,949 INFO L87 Difference]: Start difference. First operand 52870 states and 189121 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:17,630 INFO L93 Difference]: Finished difference Result 82755 states and 292254 transitions. [2021-06-05 15:56:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:56:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:17,823 INFO L225 Difference]: With dead ends: 82755 [2021-06-05 15:56:17,823 INFO L226 Difference]: Without dead ends: 82657 [2021-06-05 15:56:17,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2634.9ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:56:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82657 states. [2021-06-05 15:56:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82657 to 53035. [2021-06-05 15:56:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53035 states, 53034 states have (on average 3.57517818757778) internal successors, (189606), 53034 states have internal predecessors, (189606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53035 states to 53035 states and 189606 transitions. [2021-06-05 15:56:18,952 INFO L78 Accepts]: Start accepts. Automaton has 53035 states and 189606 transitions. Word has length 37 [2021-06-05 15:56:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:18,952 INFO L482 AbstractCegarLoop]: Abstraction has 53035 states and 189606 transitions. [2021-06-05 15:56:18,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 53035 states and 189606 transitions. [2021-06-05 15:56:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:19,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:19,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:19,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:19,218 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2084348775, now seen corresponding path program 67 times [2021-06-05 15:56:19,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:19,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386527019] [2021-06-05 15:56:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:19,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386527019] [2021-06-05 15:56:19,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386527019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081284025] [2021-06-05 15:56:19,546 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 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 [2021-06-05 15:56:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:56:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:19,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:19,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:19,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:19,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:19,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-06-05 15:56:19,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:19,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 15:56:19,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:19,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:19,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:19,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:64 [2021-06-05 15:56:20,000 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 2=[v_C_80]} [2021-06-05 15:56:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 15:56:20,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:20,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 15:56:20,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:20,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:20,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:20,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 29 [2021-06-05 15:56:20,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:20,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:20,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:20,025 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:23 [2021-06-05 15:56:20,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:56:20,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:20,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:20,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:20,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-06-05 15:56:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:20,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081284025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:20,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:20,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2021-06-05 15:56:20,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719926889] [2021-06-05 15:56:20,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:56:20,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:56:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:56:20,116 INFO L87 Difference]: Start difference. First operand 53035 states and 189606 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:22,523 INFO L93 Difference]: Finished difference Result 82606 states and 291824 transitions. [2021-06-05 15:56:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:56:22,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:22,706 INFO L225 Difference]: With dead ends: 82606 [2021-06-05 15:56:22,706 INFO L226 Difference]: Without dead ends: 82487 [2021-06-05 15:56:22,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1691.3ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:56:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82487 states. [2021-06-05 15:56:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82487 to 53020. [2021-06-05 15:56:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53020 states, 53019 states have (on average 3.5756426941285198) internal successors, (189577), 53019 states have internal predecessors, (189577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53020 states to 53020 states and 189577 transitions. [2021-06-05 15:56:23,860 INFO L78 Accepts]: Start accepts. Automaton has 53020 states and 189577 transitions. Word has length 37 [2021-06-05 15:56:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:23,861 INFO L482 AbstractCegarLoop]: Abstraction has 53020 states and 189577 transitions. [2021-06-05 15:56:23,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 53020 states and 189577 transitions. [2021-06-05 15:56:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:23,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:23,923 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:24,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 15:56:24,123 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1585798617, now seen corresponding path program 68 times [2021-06-05 15:56:24,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:24,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697274784] [2021-06-05 15:56:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:24,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:24,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697274784] [2021-06-05 15:56:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697274784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:24,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140883453] [2021-06-05 15:56:24,458 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 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 [2021-06-05 15:56:24,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:24,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:24,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:56:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:24,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:24,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:24,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:57 [2021-06-05 15:56:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:56:24,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:24,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:74 [2021-06-05 15:56:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2021-06-05 15:56:24,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:24,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-06-05 15:56:24,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:24,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:24,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2021-06-05 15:56:24,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:24,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,814 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:104, output treesize:31 [2021-06-05 15:56:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:56:24,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:24,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:24,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:56:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:24,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140883453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:24,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:24,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2021-06-05 15:56:24,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635623968] [2021-06-05 15:56:24,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:56:24,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:56:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:56:24,869 INFO L87 Difference]: Start difference. First operand 53020 states and 189577 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:27,055 INFO L93 Difference]: Finished difference Result 82242 states and 290550 transitions. [2021-06-05 15:56:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:56:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:27,243 INFO L225 Difference]: With dead ends: 82242 [2021-06-05 15:56:27,243 INFO L226 Difference]: Without dead ends: 82165 [2021-06-05 15:56:27,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1588.6ms TimeCoverageRelationStatistics Valid=396, Invalid=1860, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:56:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82165 states. [2021-06-05 15:56:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82165 to 53130. [2021-06-05 15:56:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53130 states, 53129 states have (on average 3.574432042763839) internal successors, (189906), 53129 states have internal predecessors, (189906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53130 states to 53130 states and 189906 transitions. [2021-06-05 15:56:28,386 INFO L78 Accepts]: Start accepts. Automaton has 53130 states and 189906 transitions. Word has length 37 [2021-06-05 15:56:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:28,386 INFO L482 AbstractCegarLoop]: Abstraction has 53130 states and 189906 transitions. [2021-06-05 15:56:28,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 53130 states and 189906 transitions. [2021-06-05 15:56:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:28,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:28,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:28,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:56:28,648 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1185678759, now seen corresponding path program 69 times [2021-06-05 15:56:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:28,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024179448] [2021-06-05 15:56:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:28,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:28,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024179448] [2021-06-05 15:56:28,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024179448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:28,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471319972] [2021-06-05 15:56:28,998 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 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 [2021-06-05 15:56:29,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:56:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:56:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:29,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:56:29,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:29,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:29,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:29,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:72 [2021-06-05 15:56:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:56:29,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:29,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:29,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:29,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:84, output treesize:83 [2021-06-05 15:56:29,704 INFO L446 ElimStorePlain]: Different costs {2=[v_C_86], 5=[A, B]} [2021-06-05 15:56:29,725 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 15:56:29,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 15:56:29,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:29,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:29,764 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 15:56:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 49 [2021-06-05 15:56:29,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:29,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:29,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:29,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:29,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2021-06-05 15:56:29,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 15:56:29,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:29,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:29,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:83, output treesize:42 [2021-06-05 15:56:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:30,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:30,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:30,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:30,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:30,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-05 15:56:30,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:56:30,073 INFO L628 ElimStorePlain]: treesize reduction 75, result has 28.6 percent of original size [2021-06-05 15:56:30,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:30,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:37 [2021-06-05 15:56:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:30,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471319972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:30,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:30,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 15:56:30,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946798941] [2021-06-05 15:56:30,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:56:30,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:56:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:56:30,142 INFO L87 Difference]: Start difference. First operand 53130 states and 189906 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:33,056 INFO L93 Difference]: Finished difference Result 81870 states and 289366 transitions. [2021-06-05 15:56:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:56:33,057 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:33,234 INFO L225 Difference]: With dead ends: 81870 [2021-06-05 15:56:33,234 INFO L226 Difference]: Without dead ends: 81722 [2021-06-05 15:56:33,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2261.4ms TimeCoverageRelationStatistics Valid=504, Invalid=2918, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:56:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81722 states. [2021-06-05 15:56:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81722 to 53183. [2021-06-05 15:56:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53183 states, 53182 states have (on average 3.5736151329397163) internal successors, (190052), 53182 states have internal predecessors, (190052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53183 states to 53183 states and 190052 transitions. [2021-06-05 15:56:34,376 INFO L78 Accepts]: Start accepts. Automaton has 53183 states and 190052 transitions. Word has length 37 [2021-06-05 15:56:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:34,376 INFO L482 AbstractCegarLoop]: Abstraction has 53183 states and 190052 transitions. [2021-06-05 15:56:34,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 53183 states and 190052 transitions. [2021-06-05 15:56:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:34,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:34,436 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:34,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 15:56:34,636 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash 533169711, now seen corresponding path program 70 times [2021-06-05 15:56:34,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:34,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346555906] [2021-06-05 15:56:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:35,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346555906] [2021-06-05 15:56:35,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346555906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:35,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008911525] [2021-06-05 15:56:35,052 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 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 [2021-06-05 15:56:35,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:56:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:35,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:35,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:35,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:56:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:56:35,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:35,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:56:35,313 INFO L446 ElimStorePlain]: Different costs {3=[v_C_89], 12=[A, B]} [2021-06-05 15:56:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-06-05 15:56:35,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:35,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:35,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-06-05 15:56:35,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:35,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:35,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-06-05 15:56:35,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:35,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:29 [2021-06-05 15:56:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:56:35,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:35,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:35,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 15:56:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008911525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:35,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:35,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:56:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296426354] [2021-06-05 15:56:35,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:56:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:56:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:56:35,432 INFO L87 Difference]: Start difference. First operand 53183 states and 190052 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:37,452 INFO L93 Difference]: Finished difference Result 82234 states and 290538 transitions. [2021-06-05 15:56:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:56:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:37,653 INFO L225 Difference]: With dead ends: 82234 [2021-06-05 15:56:37,653 INFO L226 Difference]: Without dead ends: 82115 [2021-06-05 15:56:37,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1500.6ms TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:56:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82115 states. [2021-06-05 15:56:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82115 to 53120. [2021-06-05 15:56:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53120 states, 53119 states have (on average 3.574653137295506) internal successors, (189882), 53119 states have internal predecessors, (189882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53120 states to 53120 states and 189882 transitions. [2021-06-05 15:56:38,796 INFO L78 Accepts]: Start accepts. Automaton has 53120 states and 189882 transitions. Word has length 37 [2021-06-05 15:56:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:38,796 INFO L482 AbstractCegarLoop]: Abstraction has 53120 states and 189882 transitions. [2021-06-05 15:56:38,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53120 states and 189882 transitions. [2021-06-05 15:56:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:38,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:38,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:39,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:56:39,058 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:39,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1906231023, now seen corresponding path program 71 times [2021-06-05 15:56:39,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:39,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781959244] [2021-06-05 15:56:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:39,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:39,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781959244] [2021-06-05 15:56:39,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781959244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:39,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612109104] [2021-06-05 15:56:39,466 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 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 [2021-06-05 15:56:39,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:56:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:56:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:39,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:39,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:39,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:39,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 15:56:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:39,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:56:39,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:39,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:39,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:39,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:56:39,998 INFO L446 ElimStorePlain]: Different costs {3=[v_C_92], 12=[A, B]} [2021-06-05 15:56:40,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 15:56:40,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:40,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:40,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:40,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-06-05 15:56:40,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:40,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:40,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:40,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:40,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 15:56:40,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:40,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:40,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:40,034 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-06-05 15:56:40,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:56:40,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:40,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:40,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:40,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 15:56:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612109104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:40,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:40,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 15:56:40,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806001433] [2021-06-05 15:56:40,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:56:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:56:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:56:40,140 INFO L87 Difference]: Start difference. First operand 53120 states and 189882 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:42,684 INFO L93 Difference]: Finished difference Result 82249 states and 290672 transitions. [2021-06-05 15:56:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:56:42,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:42,861 INFO L225 Difference]: With dead ends: 82249 [2021-06-05 15:56:42,861 INFO L226 Difference]: Without dead ends: 82222 [2021-06-05 15:56:42,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1773.8ms TimeCoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:56:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82222 states. [2021-06-05 15:56:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82222 to 53245. [2021-06-05 15:56:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53245 states, 53244 states have (on average 3.5741304184509053) internal successors, (190301), 53244 states have internal predecessors, (190301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53245 states to 53245 states and 190301 transitions. [2021-06-05 15:56:44,011 INFO L78 Accepts]: Start accepts. Automaton has 53245 states and 190301 transitions. Word has length 37 [2021-06-05 15:56:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:44,011 INFO L482 AbstractCegarLoop]: Abstraction has 53245 states and 190301 transitions. [2021-06-05 15:56:44,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 53245 states and 190301 transitions. [2021-06-05 15:56:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:44,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:44,072 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:44,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:56:44,272 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:44,272 INFO L82 PathProgramCache]: Analyzing trace with hash -689917951, now seen corresponding path program 72 times [2021-06-05 15:56:44,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:44,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277870281] [2021-06-05 15:56:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:44,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277870281] [2021-06-05 15:56:44,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277870281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327231091] [2021-06-05 15:56:44,604 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 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 [2021-06-05 15:56:44,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:56:44,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:56:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:44,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:44,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:44,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:44,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:56:44,856 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 15:56:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 15:56:44,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:44,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:44,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:44,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:71 [2021-06-05 15:56:45,001 INFO L446 ElimStorePlain]: Different costs {5=[v_C_95], 7=[A, B]} [2021-06-05 15:56:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,025 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 15:56:45,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 65 [2021-06-05 15:56:45,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:45,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:45,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,073 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 15:56:45,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 78 [2021-06-05 15:56:45,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:45,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 74 [2021-06-05 15:56:45,123 INFO L550 ElimStorePlain]: Start of recursive call 4: 3 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:56:45,151 INFO L628 ElimStorePlain]: treesize reduction 41, result has 54.4 percent of original size [2021-06-05 15:56:45,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:45,156 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:49 [2021-06-05 15:56:45,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:45,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:45,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:45,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 15:56:45,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:56:45,342 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-06-05 15:56:45,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:45,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:22 [2021-06-05 15:56:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:45,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327231091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:45,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:45,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 15:56:45,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641061790] [2021-06-05 15:56:45,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:56:45,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:56:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:56:45,393 INFO L87 Difference]: Start difference. First operand 53245 states and 190301 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:48,363 INFO L93 Difference]: Finished difference Result 83957 states and 295832 transitions. [2021-06-05 15:56:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:56:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:48,557 INFO L225 Difference]: With dead ends: 83957 [2021-06-05 15:56:48,557 INFO L226 Difference]: Without dead ends: 83851 [2021-06-05 15:56:48,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2131.0ms TimeCoverageRelationStatistics Valid=561, Invalid=3221, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:56:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83851 states. [2021-06-05 15:56:49,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83851 to 53211. [2021-06-05 15:56:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53211 states, 53210 states have (on average 3.5747227964668293) internal successors, (190211), 53210 states have internal predecessors, (190211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53211 states to 53211 states and 190211 transitions. [2021-06-05 15:56:49,923 INFO L78 Accepts]: Start accepts. Automaton has 53211 states and 190211 transitions. Word has length 37 [2021-06-05 15:56:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:49,923 INFO L482 AbstractCegarLoop]: Abstraction has 53211 states and 190211 transitions. [2021-06-05 15:56:49,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53211 states and 190211 transitions. [2021-06-05 15:56:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:49,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:49,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:50,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:50,195 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 228913555, now seen corresponding path program 73 times [2021-06-05 15:56:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:50,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802261174] [2021-06-05 15:56:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:50,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:50,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802261174] [2021-06-05 15:56:50,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802261174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:50,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459737187] [2021-06-05 15:56:50,568 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 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 [2021-06-05 15:56:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:56:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:50,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:56:50,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:50,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 15:56:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 15:56:50,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:50,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:70 [2021-06-05 15:56:50,843 INFO L446 ElimStorePlain]: Different costs {3=[v_C_98], 12=[A, B]} [2021-06-05 15:56:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-06-05 15:56:50,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:50,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2021-06-05 15:56:50,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:50,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:50,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 15:56:50,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:50,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:88, output treesize:26 [2021-06-05 15:56:50,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:56:50,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:50,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:50,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-06-05 15:56:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:50,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459737187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:50,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:50,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:56:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553204571] [2021-06-05 15:56:50,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:56:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:56:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:56:50,934 INFO L87 Difference]: Start difference. First operand 53211 states and 190211 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:52,868 INFO L93 Difference]: Finished difference Result 83029 states and 293218 transitions. [2021-06-05 15:56:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:56:52,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:53,072 INFO L225 Difference]: With dead ends: 83029 [2021-06-05 15:56:53,073 INFO L226 Difference]: Without dead ends: 82906 [2021-06-05 15:56:53,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:56:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82906 states. [2021-06-05 15:56:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82906 to 53317. [2021-06-05 15:56:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53317 states, 53316 states have (on average 3.573467626978768) internal successors, (190523), 53316 states have internal predecessors, (190523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53317 states to 53317 states and 190523 transitions. [2021-06-05 15:56:54,260 INFO L78 Accepts]: Start accepts. Automaton has 53317 states and 190523 transitions. Word has length 37 [2021-06-05 15:56:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:54,260 INFO L482 AbstractCegarLoop]: Abstraction has 53317 states and 190523 transitions. [2021-06-05 15:56:54,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 53317 states and 190523 transitions. [2021-06-05 15:56:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:54,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:54,321 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:54,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:56:54,528 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1294576365, now seen corresponding path program 74 times [2021-06-05 15:56:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:54,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286218140] [2021-06-05 15:56:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:54,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286218140] [2021-06-05 15:56:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286218140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238275414] [2021-06-05 15:56:54,910 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 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 [2021-06-05 15:56:54,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:54,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:54,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:56:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:55,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:55,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:55,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:56:55,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 15:56:55,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:55,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:77 [2021-06-05 15:56:55,175 INFO L446 ElimStorePlain]: Different costs {3=[v_C_101], 12=[A, B]} [2021-06-05 15:56:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-06-05 15:56:55,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-06-05 15:56:55,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:55,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:56:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 15:56:55,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:55,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:84, output treesize:28 [2021-06-05 15:56:55,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:55,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 15:56:55,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:56:55,300 INFO L628 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2021-06-05 15:56:55,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:55,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 15:56:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238275414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:55,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:56:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975709237] [2021-06-05 15:56:55,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:56:55,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:56:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:56:55,342 INFO L87 Difference]: Start difference. First operand 53317 states and 190523 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:56,888 INFO L93 Difference]: Finished difference Result 83428 states and 294260 transitions. [2021-06-05 15:56:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:56:56,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:56:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:57,076 INFO L225 Difference]: With dead ends: 83428 [2021-06-05 15:56:57,076 INFO L226 Difference]: Without dead ends: 83197 [2021-06-05 15:56:57,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1023.4ms TimeCoverageRelationStatistics Valid=296, Invalid=1186, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:56:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83197 states. [2021-06-05 15:56:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83197 to 53299. [2021-06-05 15:56:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53299 states, 53298 states have (on average 3.573661300611655) internal successors, (190469), 53298 states have internal predecessors, (190469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53299 states to 53299 states and 190469 transitions. [2021-06-05 15:56:58,226 INFO L78 Accepts]: Start accepts. Automaton has 53299 states and 190469 transitions. Word has length 37 [2021-06-05 15:56:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:58,226 INFO L482 AbstractCegarLoop]: Abstraction has 53299 states and 190469 transitions. [2021-06-05 15:56:58,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 53299 states and 190469 transitions. [2021-06-05 15:56:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:56:58,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:58,286 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:58,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 15:56:58,487 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:58,488 INFO L82 PathProgramCache]: Analyzing trace with hash 720407985, now seen corresponding path program 75 times [2021-06-05 15:56:58,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:58,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018199348] [2021-06-05 15:56:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:58,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018199348] [2021-06-05 15:56:58,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018199348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464000319] [2021-06-05 15:56:58,849 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 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 [2021-06-05 15:56:58,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:56:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:58,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:56:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:56:58,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:58,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:58,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:58,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 15:56:59,055 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-06-05 15:56:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 15:56:59,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:59,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:59,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:59,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:92 [2021-06-05 15:56:59,541 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 15:56:59,636 INFO L446 ElimStorePlain]: Different costs {6=[v_C_104], 7=[A, B]} [2021-06-05 15:56:59,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:59,657 INFO L354 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2021-06-05 15:56:59,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 56 [2021-06-05 15:56:59,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:59,706 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.9 percent of original size [2021-06-05 15:56:59,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:59,737 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 15:56:59,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 64 [2021-06-05 15:56:59,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:56:59,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:59,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:59,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 74 [2021-06-05 15:56:59,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 15:56:59,842 INFO L628 ElimStorePlain]: treesize reduction 75, result has 41.4 percent of original size [2021-06-05 15:56:59,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:56:59,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:99, output treesize:53 [2021-06-05 15:57:00,263 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_3]} [2021-06-05 15:57:00,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:00,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-06-05 15:57:00,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:57:00,340 INFO L628 ElimStorePlain]: treesize reduction 20, result has 81.1 percent of original size [2021-06-05 15:57:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:00,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:00,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:00,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 85 [2021-06-05 15:57:00,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 15:57:00,876 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 67 [2021-06-05 15:57:00,876 INFO L628 ElimStorePlain]: treesize reduction 948, result has 15.8 percent of original size [2021-06-05 15:57:00,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:00,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:89, output treesize:217 [2021-06-05 15:57:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:00,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464000319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:00,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:00,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 15:57:00,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378348020] [2021-06-05 15:57:00,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:57:00,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:57:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:57:00,990 INFO L87 Difference]: Start difference. First operand 53299 states and 190469 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:01,628 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-05 15:57:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:04,494 INFO L93 Difference]: Finished difference Result 84462 states and 297726 transitions. [2021-06-05 15:57:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:57:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:04,693 INFO L225 Difference]: With dead ends: 84462 [2021-06-05 15:57:04,693 INFO L226 Difference]: Without dead ends: 84254 [2021-06-05 15:57:04,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2506.4ms TimeCoverageRelationStatistics Valid=516, Invalid=3024, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:57:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84254 states. [2021-06-05 15:57:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84254 to 53319. [2021-06-05 15:57:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53319 states, 53318 states have (on average 3.5734461157582804) internal successors, (190529), 53318 states have internal predecessors, (190529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53319 states to 53319 states and 190529 transitions. [2021-06-05 15:57:06,006 INFO L78 Accepts]: Start accepts. Automaton has 53319 states and 190529 transitions. Word has length 37 [2021-06-05 15:57:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:06,006 INFO L482 AbstractCegarLoop]: Abstraction has 53319 states and 190529 transitions. [2021-06-05 15:57:06,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53319 states and 190529 transitions. [2021-06-05 15:57:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:06,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:06,075 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:06,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:06,277 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -395343355, now seen corresponding path program 76 times [2021-06-05 15:57:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:06,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17742807] [2021-06-05 15:57:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:06,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:06,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17742807] [2021-06-05 15:57:06,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17742807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:06,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704778900] [2021-06-05 15:57:06,654 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 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 [2021-06-05 15:57:06,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:06,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:06,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:57:06,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:06,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:06,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:06,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 15:57:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 15:57:06,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:06,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:65 [2021-06-05 15:57:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:06,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:06,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-06-05 15:57:06,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:06,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:84, output treesize:88 [2021-06-05 15:57:06,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 15:57:06,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:06,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:43 [2021-06-05 15:57:07,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 15:57:07,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:07,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:07,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:57:07,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:07,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:07,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:07,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 15:57:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704778900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:07,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:07,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:57:07,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319963478] [2021-06-05 15:57:07,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:57:07,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:57:07,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:57:07,054 INFO L87 Difference]: Start difference. First operand 53319 states and 190529 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:09,494 INFO L93 Difference]: Finished difference Result 83401 states and 294413 transitions. [2021-06-05 15:57:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:57:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:09,688 INFO L225 Difference]: With dead ends: 83401 [2021-06-05 15:57:09,688 INFO L226 Difference]: Without dead ends: 83373 [2021-06-05 15:57:09,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1669.9ms TimeCoverageRelationStatistics Valid=367, Invalid=2183, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:57:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83373 states. [2021-06-05 15:57:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83373 to 53372. [2021-06-05 15:57:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53372 states, 53371 states have (on average 3.573026549999063) internal successors, (190696), 53371 states have internal predecessors, (190696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53372 states to 53372 states and 190696 transitions. [2021-06-05 15:57:10,821 INFO L78 Accepts]: Start accepts. Automaton has 53372 states and 190696 transitions. Word has length 37 [2021-06-05 15:57:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:10,821 INFO L482 AbstractCegarLoop]: Abstraction has 53372 states and 190696 transitions. [2021-06-05 15:57:10,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 53372 states and 190696 transitions. [2021-06-05 15:57:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:10,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:10,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:11,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:11,084 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1514138647, now seen corresponding path program 77 times [2021-06-05 15:57:11,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:11,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425274042] [2021-06-05 15:57:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:11,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425274042] [2021-06-05 15:57:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425274042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647546862] [2021-06-05 15:57:11,446 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 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 [2021-06-05 15:57:11,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:57:11,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:57:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:11,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:11,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:11,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:11,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:66 [2021-06-05 15:57:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,679 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:11,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 50 [2021-06-05 15:57:11,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:11,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:11,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:11,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:92 [2021-06-05 15:57:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,885 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-06-05 15:57:11,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 70 [2021-06-05 15:57:11,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:11,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:11,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:11,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:111 [2021-06-05 15:57:12,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 15:57:12,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:12,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 15:57:12,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:12,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:12,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:12,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:40 [2021-06-05 15:57:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:12,319 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 15:57:12,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:12,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 87 [2021-06-05 15:57:12,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:57:12,753 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 39 [2021-06-05 15:57:12,753 INFO L628 ElimStorePlain]: treesize reduction 1034, result has 5.6 percent of original size [2021-06-05 15:57:12,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:12,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:39 [2021-06-05 15:57:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647546862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:12,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:12,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:57:12,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812641468] [2021-06-05 15:57:12,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:57:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:57:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:57:12,815 INFO L87 Difference]: Start difference. First operand 53372 states and 190696 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:14,157 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 18 [2021-06-05 15:57:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:16,511 INFO L93 Difference]: Finished difference Result 84873 states and 298968 transitions. [2021-06-05 15:57:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:57:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:16,697 INFO L225 Difference]: With dead ends: 84873 [2021-06-05 15:57:16,698 INFO L226 Difference]: Without dead ends: 84717 [2021-06-05 15:57:16,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2724.4ms TimeCoverageRelationStatistics Valid=656, Invalid=3634, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:57:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84717 states. [2021-06-05 15:57:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84717 to 53375. [2021-06-05 15:57:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53375 states, 53374 states have (on average 3.5727695132461497) internal successors, (190693), 53374 states have internal predecessors, (190693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53375 states to 53375 states and 190693 transitions. [2021-06-05 15:57:17,763 INFO L78 Accepts]: Start accepts. Automaton has 53375 states and 190693 transitions. Word has length 37 [2021-06-05 15:57:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:17,763 INFO L482 AbstractCegarLoop]: Abstraction has 53375 states and 190693 transitions. [2021-06-05 15:57:17,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 53375 states and 190693 transitions. [2021-06-05 15:57:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:18,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:18,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:18,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 15:57:18,225 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1788321893, now seen corresponding path program 78 times [2021-06-05 15:57:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:18,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925060016] [2021-06-05 15:57:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:18,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:18,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925060016] [2021-06-05 15:57:18,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925060016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:18,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388679370] [2021-06-05 15:57:18,551 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 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 [2021-06-05 15:57:18,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:57:18,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:18,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:57:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:18,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:18,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 15:57:18,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:18,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:57:18,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:18,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:62 [2021-06-05 15:57:19,061 INFO L446 ElimStorePlain]: Different costs {2=[v_C_113], 9=[A, B]} [2021-06-05 15:57:19,083 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 15:57:19,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 50 [2021-06-05 15:57:19,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:19,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,127 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 15:57:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 54 [2021-06-05 15:57:19,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:19,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:19,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 49 [2021-06-05 15:57:19,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 15:57:19,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:19,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:19,189 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:97, output treesize:54 [2021-06-05 15:57:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:19,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:57:19,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:19,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:19,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:19,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:15 [2021-06-05 15:57:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:19,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388679370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:19,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:19,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 15:57:19,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861264862] [2021-06-05 15:57:19,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:57:19,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:19,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:57:19,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:57:19,376 INFO L87 Difference]: Start difference. First operand 53375 states and 190693 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:23,546 INFO L93 Difference]: Finished difference Result 84037 states and 296090 transitions. [2021-06-05 15:57:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:57:23,547 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:23,731 INFO L225 Difference]: With dead ends: 84037 [2021-06-05 15:57:23,731 INFO L226 Difference]: Without dead ends: 83820 [2021-06-05 15:57:23,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2926.8ms TimeCoverageRelationStatistics Valid=507, Invalid=3915, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:57:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83820 states. [2021-06-05 15:57:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83820 to 53426. [2021-06-05 15:57:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53426 states, 53425 states have (on average 3.5720355638745906) internal successors, (190836), 53425 states have internal predecessors, (190836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53426 states to 53426 states and 190836 transitions. [2021-06-05 15:57:24,811 INFO L78 Accepts]: Start accepts. Automaton has 53426 states and 190836 transitions. Word has length 37 [2021-06-05 15:57:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:24,811 INFO L482 AbstractCegarLoop]: Abstraction has 53426 states and 190836 transitions. [2021-06-05 15:57:24,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 53426 states and 190836 transitions. [2021-06-05 15:57:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:25,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:25,052 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:25,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:25,257 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1436028709, now seen corresponding path program 79 times [2021-06-05 15:57:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:25,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894678224] [2021-06-05 15:57:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:25,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894678224] [2021-06-05 15:57:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894678224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354794009] [2021-06-05 15:57:25,663 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 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 [2021-06-05 15:57:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:25,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:57:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:25,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:25,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 15:57:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 15:57:25,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:73 [2021-06-05 15:57:25,919 INFO L446 ElimStorePlain]: Different costs {3=[v_C_116], 12=[A, B]} [2021-06-05 15:57:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-06-05 15:57:25,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-06-05 15:57:25,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:25,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 15:57:25,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,957 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:29 [2021-06-05 15:57:26,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:57:26,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:26,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:26,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:26,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 15:57:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:26,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354794009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:26,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:26,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:57:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456459906] [2021-06-05 15:57:26,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:57:26,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:26,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:57:26,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:57:26,033 INFO L87 Difference]: Start difference. First operand 53426 states and 190836 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:28,743 INFO L93 Difference]: Finished difference Result 83416 states and 294347 transitions. [2021-06-05 15:57:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:57:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:28,925 INFO L225 Difference]: With dead ends: 83416 [2021-06-05 15:57:28,925 INFO L226 Difference]: Without dead ends: 83197 [2021-06-05 15:57:28,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1762.2ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:57:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83197 states. [2021-06-05 15:57:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83197 to 53511. [2021-06-05 15:57:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53511 states, 53510 states have (on average 3.5710708278826386) internal successors, (191088), 53510 states have internal predecessors, (191088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53511 states to 53511 states and 191088 transitions. [2021-06-05 15:57:30,015 INFO L78 Accepts]: Start accepts. Automaton has 53511 states and 191088 transitions. Word has length 37 [2021-06-05 15:57:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:30,015 INFO L482 AbstractCegarLoop]: Abstraction has 53511 states and 191088 transitions. [2021-06-05 15:57:30,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 53511 states and 191088 transitions. [2021-06-05 15:57:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:30,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:30,094 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:30,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 15:57:30,295 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1764133243, now seen corresponding path program 80 times [2021-06-05 15:57:30,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:30,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494273496] [2021-06-05 15:57:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:30,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:30,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494273496] [2021-06-05 15:57:30,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494273496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:30,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804147803] [2021-06-05 15:57:30,628 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 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 [2021-06-05 15:57:30,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:57:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:30,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:30,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:57:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:30,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-06-05 15:57:30,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:30,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:65 [2021-06-05 15:57:30,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2021-06-05 15:57:30,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:30,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-06-05 15:57:30,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 15:57:30,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:30,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:30,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:43 [2021-06-05 15:57:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 15:57:31,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:31,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:57:31,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:31,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 15:57:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:31,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804147803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:31,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:31,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:57:31,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679133127] [2021-06-05 15:57:31,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:57:31,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:57:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:57:31,054 INFO L87 Difference]: Start difference. First operand 53511 states and 191088 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 15:57:31,659 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2021-06-05 15:57:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:33,518 INFO L93 Difference]: Finished difference Result 83471 states and 294603 transitions. [2021-06-05 15:57:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:57:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:33,708 INFO L225 Difference]: With dead ends: 83471 [2021-06-05 15:57:33,708 INFO L226 Difference]: Without dead ends: 83443 [2021-06-05 15:57:33,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1711.1ms TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:57:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83443 states. [2021-06-05 15:57:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83443 to 53565. [2021-06-05 15:57:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53565 states, 53564 states have (on average 3.570495108655067) internal successors, (191250), 53564 states have internal predecessors, (191250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53565 states to 53565 states and 191250 transitions. [2021-06-05 15:57:34,843 INFO L78 Accepts]: Start accepts. Automaton has 53565 states and 191250 transitions. Word has length 37 [2021-06-05 15:57:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:34,843 INFO L482 AbstractCegarLoop]: Abstraction has 53565 states and 191250 transitions. [2021-06-05 15:57:34,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 15:57:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 53565 states and 191250 transitions. [2021-06-05 15:57:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:35,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:35,136 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:35,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:35,345 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1412038761, now seen corresponding path program 81 times [2021-06-05 15:57:35,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:35,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746840725] [2021-06-05 15:57:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:35,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:35,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746840725] [2021-06-05 15:57:35,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746840725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:35,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451428133] [2021-06-05 15:57:35,768 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 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 [2021-06-05 15:57:35,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:57:35,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:57:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:35,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:57:35,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:35,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:35,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:35,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:57:35,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 15:57:35,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:35,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:35,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:35,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 15:57:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 15:57:36,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:36,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:36,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:73 [2021-06-05 15:57:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 54 [2021-06-05 15:57:36,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:36,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 15:57:36,280 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:36,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:36,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:51 [2021-06-05 15:57:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 15:57:36,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:36,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:36,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:36,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 15:57:36,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 15:57:36,483 INFO L628 ElimStorePlain]: treesize reduction 66, result has 40.0 percent of original size [2021-06-05 15:57:36,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:36,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:87, output treesize:50 [2021-06-05 15:57:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:36,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451428133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:36,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:36,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 15:57:36,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414393218] [2021-06-05 15:57:36,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:57:36,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:57:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:57:36,601 INFO L87 Difference]: Start difference. First operand 53565 states and 191250 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:37,948 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 34 [2021-06-05 15:57:43,111 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 15:57:43,594 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-05 15:57:43,836 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-05 15:57:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:44,733 INFO L93 Difference]: Finished difference Result 85460 states and 300505 transitions. [2021-06-05 15:57:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:57:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:44,920 INFO L225 Difference]: With dead ends: 85460 [2021-06-05 15:57:44,921 INFO L226 Difference]: Without dead ends: 85287 [2021-06-05 15:57:44,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 6331.9ms TimeCoverageRelationStatistics Valid=961, Invalid=6695, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 15:57:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85287 states. [2021-06-05 15:57:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85287 to 53585. [2021-06-05 15:57:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53585 states, 53584 states have (on average 3.5700768886234697) internal successors, (191299), 53584 states have internal predecessors, (191299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53585 states to 53585 states and 191299 transitions. [2021-06-05 15:57:46,023 INFO L78 Accepts]: Start accepts. Automaton has 53585 states and 191299 transitions. Word has length 37 [2021-06-05 15:57:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:46,024 INFO L482 AbstractCegarLoop]: Abstraction has 53585 states and 191299 transitions. [2021-06-05 15:57:46,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 53585 states and 191299 transitions. [2021-06-05 15:57:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:46,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:46,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:46,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 15:57:46,285 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash -537673117, now seen corresponding path program 82 times [2021-06-05 15:57:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:46,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823935798] [2021-06-05 15:57:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:46,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:46,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823935798] [2021-06-05 15:57:46,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823935798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:46,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323858810] [2021-06-05 15:57:46,709 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 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 [2021-06-05 15:57:46,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:57:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:46,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:46,986 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 15:57:46,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:46,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:46,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 15:57:47,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 15:57:47,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:47,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:71 [2021-06-05 15:57:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-06-05 15:57:47,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:47,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:77 [2021-06-05 15:57:47,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:47,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 15:57:47,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:47,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:47,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 15:57:47,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:47,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:25 [2021-06-05 15:57:47,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:57:47,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:47,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:47,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:57:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:47,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323858810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:47,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:47,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:57:47,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785148921] [2021-06-05 15:57:47,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:57:47,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:47,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:57:47,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:57:47,266 INFO L87 Difference]: Start difference. First operand 53585 states and 191299 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:49,975 INFO L93 Difference]: Finished difference Result 83477 states and 294546 transitions. [2021-06-05 15:57:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:57:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:50,159 INFO L225 Difference]: With dead ends: 83477 [2021-06-05 15:57:50,159 INFO L226 Difference]: Without dead ends: 83303 [2021-06-05 15:57:50,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1789.6ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:57:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83303 states. [2021-06-05 15:57:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83303 to 53588. [2021-06-05 15:57:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53588 states, 53587 states have (on average 3.5697090712299624) internal successors, (191290), 53587 states have internal predecessors, (191290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53588 states to 53588 states and 191290 transitions. [2021-06-05 15:57:51,323 INFO L78 Accepts]: Start accepts. Automaton has 53588 states and 191290 transitions. Word has length 37 [2021-06-05 15:57:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:51,323 INFO L482 AbstractCegarLoop]: Abstraction has 53588 states and 191290 transitions. [2021-06-05 15:57:51,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 53588 states and 191290 transitions. [2021-06-05 15:57:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:51,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:51,386 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:51,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:51,586 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash -910835223, now seen corresponding path program 83 times [2021-06-05 15:57:51,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:51,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664080723] [2021-06-05 15:57:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:51,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:51,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664080723] [2021-06-05 15:57:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664080723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719067602] [2021-06-05 15:57:51,954 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 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 [2021-06-05 15:57:51,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:57:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:57:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:57:52,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-06-05 15:57:52,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 15:57:52,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:70 [2021-06-05 15:57:52,286 INFO L446 ElimStorePlain]: Different costs {3=[v_C_128], 12=[A, B]} [2021-06-05 15:57:52,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 66 [2021-06-05 15:57:52,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:52,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:52,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2021-06-05 15:57:52,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:52,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:52,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:52,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 15:57:52,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,325 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:92, output treesize:26 [2021-06-05 15:57:52,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:57:52,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:57:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:52,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719067602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:52,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:52,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:57:52,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112950831] [2021-06-05 15:57:52,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:57:52,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:57:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:57:52,381 INFO L87 Difference]: Start difference. First operand 53588 states and 191290 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:54,314 INFO L93 Difference]: Finished difference Result 83439 states and 294402 transitions. [2021-06-05 15:57:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:57:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:57:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:54,504 INFO L225 Difference]: With dead ends: 83439 [2021-06-05 15:57:54,505 INFO L226 Difference]: Without dead ends: 83318 [2021-06-05 15:57:54,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1323.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1597, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:57:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83318 states. [2021-06-05 15:57:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83318 to 53710. [2021-06-05 15:57:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53710 states, 53709 states have (on average 3.568619784393677) internal successors, (191667), 53709 states have internal predecessors, (191667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53710 states to 53710 states and 191667 transitions. [2021-06-05 15:57:55,676 INFO L78 Accepts]: Start accepts. Automaton has 53710 states and 191667 transitions. Word has length 37 [2021-06-05 15:57:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:55,676 INFO L482 AbstractCegarLoop]: Abstraction has 53710 states and 191667 transitions. [2021-06-05 15:57:55,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 53710 states and 191667 transitions. [2021-06-05 15:57:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:57:55,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:55,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:55,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 15:57:55,938 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1860642153, now seen corresponding path program 84 times [2021-06-05 15:57:55,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:55,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20741202] [2021-06-05 15:57:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:56,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:56,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20741202] [2021-06-05 15:57:56,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20741202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:56,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278614431] [2021-06-05 15:57:56,327 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 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 [2021-06-05 15:57:56,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:57:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:57:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:57:56,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:56,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:56,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:56,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 15:57:56,602 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 15:57:56,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 15:57:56,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:56,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:56,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:56,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:73 [2021-06-05 15:57:56,945 INFO L446 ElimStorePlain]: Different costs {3=[v_C_131], 10=[A, B]} [2021-06-05 15:57:56,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:56,960 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-06-05 15:57:56,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 49 [2021-06-05 15:57:56,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:56,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,036 INFO L354 Elim1Store]: treesize reduction 18, result has 73.1 percent of original size [2021-06-05 15:57:57,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 86 [2021-06-05 15:57:57,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:57:57,129 INFO L628 ElimStorePlain]: treesize reduction 100, result has 52.2 percent of original size [2021-06-05 15:57:57,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:57,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 85 treesize of output 131 [2021-06-05 15:57:57,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 15:57:57,362 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2021-06-05 15:57:57,362 INFO L628 ElimStorePlain]: treesize reduction 376, result has 17.0 percent of original size [2021-06-05 15:57:57,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:57,380 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:93, output treesize:118 [2021-06-05 15:57:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:57,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:57:57,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:57,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:57,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:57,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-06-05 15:57:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:57,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278614431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:57,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:57,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 15:57:57,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216270236] [2021-06-05 15:57:57,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:57:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:57:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:57:57,722 INFO L87 Difference]: Start difference. First operand 53710 states and 191667 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:02,740 INFO L93 Difference]: Finished difference Result 84760 states and 297978 transitions. [2021-06-05 15:58:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:58:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:02,926 INFO L225 Difference]: With dead ends: 84760 [2021-06-05 15:58:02,926 INFO L226 Difference]: Without dead ends: 84408 [2021-06-05 15:58:02,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 3717.3ms TimeCoverageRelationStatistics Valid=598, Invalid=4658, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:58:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84408 states. [2021-06-05 15:58:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84408 to 53813. [2021-06-05 15:58:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53813 states, 53812 states have (on average 3.567141158105999) internal successors, (191955), 53812 states have internal predecessors, (191955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53813 states to 53813 states and 191955 transitions. [2021-06-05 15:58:04,198 INFO L78 Accepts]: Start accepts. Automaton has 53813 states and 191955 transitions. Word has length 37 [2021-06-05 15:58:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:04,198 INFO L482 AbstractCegarLoop]: Abstraction has 53813 states and 191955 transitions. [2021-06-05 15:58:04,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 53813 states and 191955 transitions. [2021-06-05 15:58:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:04,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:04,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:04,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 15:58:04,469 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:04,470 INFO L82 PathProgramCache]: Analyzing trace with hash -422736279, now seen corresponding path program 85 times [2021-06-05 15:58:04,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:04,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825073383] [2021-06-05 15:58:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:04,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:04,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825073383] [2021-06-05 15:58:04,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825073383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:04,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391629203] [2021-06-05 15:58:04,857 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 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 [2021-06-05 15:58:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:58:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:04,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:58:04,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:04,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:04,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:04,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 15:58:05,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:05,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:05,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:58:05,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 15:58:05,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:05,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 15:58:05,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 15:58:05,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:05,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,176 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:27 [2021-06-05 15:58:05,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:58:05,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:05,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:05,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 15:58:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:05,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391629203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:05,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:05,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:58:05,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778748699] [2021-06-05 15:58:05,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:58:05,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:58:05,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:58:05,228 INFO L87 Difference]: Start difference. First operand 53813 states and 191955 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:07,094 INFO L93 Difference]: Finished difference Result 83386 states and 293975 transitions. [2021-06-05 15:58:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:58:07,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:07,279 INFO L225 Difference]: With dead ends: 83386 [2021-06-05 15:58:07,279 INFO L226 Difference]: Without dead ends: 83265 [2021-06-05 15:58:07,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1287.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:58:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83265 states. [2021-06-05 15:58:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83265 to 53873. [2021-06-05 15:58:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53873 states, 53872 states have (on average 3.566509504009504) internal successors, (192135), 53872 states have internal predecessors, (192135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53873 states to 53873 states and 192135 transitions. [2021-06-05 15:58:08,459 INFO L78 Accepts]: Start accepts. Automaton has 53873 states and 192135 transitions. Word has length 37 [2021-06-05 15:58:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:08,459 INFO L482 AbstractCegarLoop]: Abstraction has 53873 states and 192135 transitions. [2021-06-05 15:58:08,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 53873 states and 192135 transitions. [2021-06-05 15:58:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:08,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:08,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:08,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:08,721 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1946226199, now seen corresponding path program 86 times [2021-06-05 15:58:08,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:08,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081331324] [2021-06-05 15:58:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:09,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:09,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081331324] [2021-06-05 15:58:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081331324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:09,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853259867] [2021-06-05 15:58:09,138 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 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 [2021-06-05 15:58:09,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:58:09,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:09,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:58:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:58:09,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:58:09,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:09,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:58:09,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:70 [2021-06-05 15:58:09,450 INFO L446 ElimStorePlain]: Different costs {3=[v_C_137], 14=[A, B]} [2021-06-05 15:58:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-06-05 15:58:09,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:58:09,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 61 [2021-06-05 15:58:09,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:58:09,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2021-06-05 15:58:09,504 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:58:09,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:87, output treesize:50 [2021-06-05 15:58:09,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 15:58:09,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:58:09,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:58:09,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:09,652 INFO L628 ElimStorePlain]: treesize reduction 39, result has 47.3 percent of original size [2021-06-05 15:58:09,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:58:09,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:29 [2021-06-05 15:58:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:09,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853259867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:09,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:09,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:58:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682959734] [2021-06-05 15:58:09,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:58:09,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:58:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:58:09,704 INFO L87 Difference]: Start difference. First operand 53873 states and 192135 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:10,524 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-06-05 15:58:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:12,705 INFO L93 Difference]: Finished difference Result 86917 states and 305430 transitions. [2021-06-05 15:58:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:58:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:13,083 INFO L225 Difference]: With dead ends: 86917 [2021-06-05 15:58:13,083 INFO L226 Difference]: Without dead ends: 86692 [2021-06-05 15:58:13,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2417.1ms TimeCoverageRelationStatistics Valid=527, Invalid=2125, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:58:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86692 states. [2021-06-05 15:58:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86692 to 54740. [2021-06-05 15:58:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54740 states, 54739 states have (on average 3.5649536893257094) internal successors, (195142), 54739 states have internal predecessors, (195142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54740 states to 54740 states and 195142 transitions. [2021-06-05 15:58:14,309 INFO L78 Accepts]: Start accepts. Automaton has 54740 states and 195142 transitions. Word has length 37 [2021-06-05 15:58:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:14,309 INFO L482 AbstractCegarLoop]: Abstraction has 54740 states and 195142 transitions. [2021-06-05 15:58:14,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 54740 states and 195142 transitions. [2021-06-05 15:58:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:14,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:14,372 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:14,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:14,572 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1225673935, now seen corresponding path program 87 times [2021-06-05 15:58:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:14,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029182846] [2021-06-05 15:58:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:14,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:14,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029182846] [2021-06-05 15:58:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029182846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:14,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779658494] [2021-06-05 15:58:14,794 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 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 [2021-06-05 15:58:14,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:58:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:14,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 15:58:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:58:14,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:14,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:14,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:14,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 15:58:15,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:15,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:15,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:58:15,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:78 [2021-06-05 15:58:15,182 INFO L446 ElimStorePlain]: Different costs {3=[v_C_140], 6=[A, B]} [2021-06-05 15:58:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 15:58:15,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:15,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 53 [2021-06-05 15:58:15,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:58:15,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:15,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-06-05 15:58:15,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 15:58:15,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:15,279 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:104, output treesize:52 [2021-06-05 15:58:15,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:58:15,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:15,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:15,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:15,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-06-05 15:58:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779658494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:15,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:15,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 15:58:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776898109] [2021-06-05 15:58:15,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:58:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:58:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:58:15,518 INFO L87 Difference]: Start difference. First operand 54740 states and 195142 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:17,792 INFO L93 Difference]: Finished difference Result 84457 states and 297556 transitions. [2021-06-05 15:58:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:58:17,792 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:17,985 INFO L225 Difference]: With dead ends: 84457 [2021-06-05 15:58:17,986 INFO L226 Difference]: Without dead ends: 84417 [2021-06-05 15:58:17,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1391.8ms TimeCoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:58:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84417 states. [2021-06-05 15:58:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84417 to 54744. [2021-06-05 15:58:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54744 states, 54743 states have (on average 3.565058546298157) internal successors, (195162), 54743 states have internal predecessors, (195162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54744 states to 54744 states and 195162 transitions. [2021-06-05 15:58:19,135 INFO L78 Accepts]: Start accepts. Automaton has 54744 states and 195162 transitions. Word has length 37 [2021-06-05 15:58:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:19,135 INFO L482 AbstractCegarLoop]: Abstraction has 54744 states and 195162 transitions. [2021-06-05 15:58:19,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 54744 states and 195162 transitions. [2021-06-05 15:58:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:19,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:19,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:19,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 15:58:19,399 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1026882703, now seen corresponding path program 88 times [2021-06-05 15:58:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:19,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049552779] [2021-06-05 15:58:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:19,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:19,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049552779] [2021-06-05 15:58:19,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049552779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:19,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044448656] [2021-06-05 15:58:19,758 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 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 [2021-06-05 15:58:19,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:58:19,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:58:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:19,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:58:19,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:19,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:19,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:19,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 15:58:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-06-05 15:58:19,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:19,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:19,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:19,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:75 [2021-06-05 15:58:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2021-06-05 15:58:20,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:20,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:20,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-06-05 15:58:20,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:20,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:20,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2021-06-05 15:58:20,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:20,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:20,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:20,110 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:104, output treesize:37 [2021-06-05 15:58:20,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:58:20,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:20,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:20,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:20,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:58:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:20,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044448656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:20,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:20,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:58:20,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191700955] [2021-06-05 15:58:20,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:58:20,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:58:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:58:20,163 INFO L87 Difference]: Start difference. First operand 54744 states and 195162 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:22,438 INFO L93 Difference]: Finished difference Result 85740 states and 301616 transitions. [2021-06-05 15:58:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:58:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:22,630 INFO L225 Difference]: With dead ends: 85740 [2021-06-05 15:58:22,630 INFO L226 Difference]: Without dead ends: 85542 [2021-06-05 15:58:22,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1767.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:58:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85542 states. [2021-06-05 15:58:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85542 to 54788. [2021-06-05 15:58:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54788 states, 54787 states have (on average 3.5646047420008395) internal successors, (195294), 54787 states have internal predecessors, (195294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54788 states to 54788 states and 195294 transitions. [2021-06-05 15:58:23,819 INFO L78 Accepts]: Start accepts. Automaton has 54788 states and 195294 transitions. Word has length 37 [2021-06-05 15:58:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:23,819 INFO L482 AbstractCegarLoop]: Abstraction has 54788 states and 195294 transitions. [2021-06-05 15:58:23,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 54788 states and 195294 transitions. [2021-06-05 15:58:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:24,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:24,153 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:24,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 15:58:24,368 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2142634043, now seen corresponding path program 89 times [2021-06-05 15:58:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:24,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733612975] [2021-06-05 15:58:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:24,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:24,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733612975] [2021-06-05 15:58:24,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733612975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:24,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340787984] [2021-06-05 15:58:24,770 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 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 [2021-06-05 15:58:24,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:58:24,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:58:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:58:24,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:24,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:24,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:24,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:58:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:24,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:24,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:24,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:24,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:24,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-06-05 15:58:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 15:58:25,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:25,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:81 [2021-06-05 15:58:25,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 15:58:25,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:25,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:53 [2021-06-05 15:58:25,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 15:58:25,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:25,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 15:58:25,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:25,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 15:58:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:25,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340787984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:25,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:25,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:58:25,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033256658] [2021-06-05 15:58:25,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:58:25,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:58:25,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:58:25,299 INFO L87 Difference]: Start difference. First operand 54788 states and 195294 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:27,476 INFO L93 Difference]: Finished difference Result 84735 states and 298528 transitions. [2021-06-05 15:58:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:58:27,476 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:27,661 INFO L225 Difference]: With dead ends: 84735 [2021-06-05 15:58:27,661 INFO L226 Difference]: Without dead ends: 84707 [2021-06-05 15:58:27,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1544.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:58:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84707 states. [2021-06-05 15:58:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84707 to 54797. [2021-06-05 15:58:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54797 states, 54796 states have (on average 3.5645120081757793) internal successors, (195321), 54796 states have internal predecessors, (195321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54797 states to 54797 states and 195321 transitions. [2021-06-05 15:58:28,808 INFO L78 Accepts]: Start accepts. Automaton has 54797 states and 195321 transitions. Word has length 37 [2021-06-05 15:58:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:28,808 INFO L482 AbstractCegarLoop]: Abstraction has 54797 states and 195321 transitions. [2021-06-05 15:58:28,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 54797 states and 195321 transitions. [2021-06-05 15:58:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:28,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:28,872 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:29,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:29,072 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1033537961, now seen corresponding path program 90 times [2021-06-05 15:58:29,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:29,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199776144] [2021-06-05 15:58:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:29,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:29,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199776144] [2021-06-05 15:58:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199776144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:29,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344295254] [2021-06-05 15:58:29,427 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 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 [2021-06-05 15:58:29,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:58:29,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:58:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:58:29,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:29,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 15:58:29,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:29,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:29,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-06-05 15:58:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-06-05 15:58:29,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:29,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:114 [2021-06-05 15:58:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 67 [2021-06-05 15:58:29,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:29,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:29,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 15:58:29,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:29,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:117, output treesize:31 [2021-06-05 15:58:29,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:58:29,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:29,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:29,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-06-05 15:58:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:29,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344295254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:29,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:29,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 15:58:29,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145135624] [2021-06-05 15:58:29,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:58:29,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:29,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:58:29,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:58:29,893 INFO L87 Difference]: Start difference. First operand 54797 states and 195321 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:32,339 INFO L93 Difference]: Finished difference Result 85957 states and 302276 transitions. [2021-06-05 15:58:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:58:32,339 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:32,528 INFO L225 Difference]: With dead ends: 85957 [2021-06-05 15:58:32,528 INFO L226 Difference]: Without dead ends: 85804 [2021-06-05 15:58:32,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1686.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:58:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85804 states. [2021-06-05 15:58:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85804 to 54780. [2021-06-05 15:58:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54780 states, 54779 states have (on average 3.564687197648734) internal successors, (195270), 54779 states have internal predecessors, (195270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54780 states to 54780 states and 195270 transitions. [2021-06-05 15:58:33,703 INFO L78 Accepts]: Start accepts. Automaton has 54780 states and 195270 transitions. Word has length 37 [2021-06-05 15:58:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:33,703 INFO L482 AbstractCegarLoop]: Abstraction has 54780 states and 195270 transitions. [2021-06-05 15:58:33,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54780 states and 195270 transitions. [2021-06-05 15:58:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:33,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:33,765 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:33,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 15:58:33,973 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash 759354715, now seen corresponding path program 91 times [2021-06-05 15:58:33,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:33,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557211817] [2021-06-05 15:58:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:34,291 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-05 15:58:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:34,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:34,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557211817] [2021-06-05 15:58:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557211817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:34,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617339492] [2021-06-05 15:58:34,594 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 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 [2021-06-05 15:58:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:58:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:34,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:58:34,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:34,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 15:58:34,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:58:34,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:34,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-06-05 15:58:34,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 15:58:34,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 15:58:34,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:34,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 15:58:34,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:34,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,911 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:27 [2021-06-05 15:58:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:58:34,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:34,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:34,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:58:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617339492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:34,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:34,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:58:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547245029] [2021-06-05 15:58:34,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:58:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:58:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:58:34,963 INFO L87 Difference]: Start difference. First operand 54780 states and 195270 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:37,143 INFO L93 Difference]: Finished difference Result 85250 states and 300139 transitions. [2021-06-05 15:58:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:58:37,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:37,338 INFO L225 Difference]: With dead ends: 85250 [2021-06-05 15:58:37,339 INFO L226 Difference]: Without dead ends: 85127 [2021-06-05 15:58:37,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1692.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1846, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:58:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85127 states. [2021-06-05 15:58:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85127 to 54786. [2021-06-05 15:58:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54786 states, 54785 states have (on average 3.564734872684129) internal successors, (195294), 54785 states have internal predecessors, (195294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54786 states to 54786 states and 195294 transitions. [2021-06-05 15:58:38,529 INFO L78 Accepts]: Start accepts. Automaton has 54786 states and 195294 transitions. Word has length 37 [2021-06-05 15:58:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:38,529 INFO L482 AbstractCegarLoop]: Abstraction has 54786 states and 195294 transitions. [2021-06-05 15:58:38,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 54786 states and 195294 transitions. [2021-06-05 15:58:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:38,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:38,592 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:38,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:38,792 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1111647899, now seen corresponding path program 92 times [2021-06-05 15:58:38,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:38,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098541673] [2021-06-05 15:58:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:39,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098541673] [2021-06-05 15:58:39,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098541673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651863705] [2021-06-05 15:58:39,236 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 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 [2021-06-05 15:58:39,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:58:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:58:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:39,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:58:39,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:58:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:39,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:58:39,528 INFO L446 ElimStorePlain]: Different costs {0=[v_C_155], 3=[A, B]} [2021-06-05 15:58:39,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 15:58:39,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-06-05 15:58:39,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 15:58:39,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 15:58:39,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,583 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:35 [2021-06-05 15:58:39,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:39,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 15:58:39,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:58:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:39,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:58:39,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:39,703 INFO L628 ElimStorePlain]: treesize reduction 39, result has 47.3 percent of original size [2021-06-05 15:58:39,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:58:39,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:29 [2021-06-05 15:58:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651863705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:39,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:39,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:58:39,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785903645] [2021-06-05 15:58:39,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:58:39,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:58:39,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:58:39,755 INFO L87 Difference]: Start difference. First operand 54786 states and 195294 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:42,127 INFO L93 Difference]: Finished difference Result 87320 states and 306669 transitions. [2021-06-05 15:58:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:58:42,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:42,319 INFO L225 Difference]: With dead ends: 87320 [2021-06-05 15:58:42,319 INFO L226 Difference]: Without dead ends: 87101 [2021-06-05 15:58:42,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1609.7ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:58:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87101 states. [2021-06-05 15:58:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87101 to 54866. [2021-06-05 15:58:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54866 states, 54865 states have (on average 3.564312403171421) internal successors, (195556), 54865 states have internal predecessors, (195556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54866 states to 54866 states and 195556 transitions. [2021-06-05 15:58:43,454 INFO L78 Accepts]: Start accepts. Automaton has 54866 states and 195556 transitions. Word has length 37 [2021-06-05 15:58:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:43,454 INFO L482 AbstractCegarLoop]: Abstraction has 54866 states and 195556 transitions. [2021-06-05 15:58:43,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 54866 states and 195556 transitions. [2021-06-05 15:58:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:43,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:43,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:43,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:43,723 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash 783543365, now seen corresponding path program 93 times [2021-06-05 15:58:43,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:43,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428960523] [2021-06-05 15:58:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:44,142 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 15:58:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:44,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428960523] [2021-06-05 15:58:44,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428960523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456091662] [2021-06-05 15:58:44,331 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 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 [2021-06-05 15:58:44,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:58:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:58:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:44,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:58:44,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:44,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:44,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:44,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 15:58:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:58:44,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:44,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:44,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:44,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 15:58:44,636 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 15:58:44,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 15:58:44,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:44,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:44,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:58:44,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:75 [2021-06-05 15:58:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:44,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:44,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 83 [2021-06-05 15:58:44,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:58:44,988 INFO L628 ElimStorePlain]: treesize reduction 169, result has 37.4 percent of original size [2021-06-05 15:58:45,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:58:45,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:128 [2021-06-05 15:58:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:45,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:58:45,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 15:58:45,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:45,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:45,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:58:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:58:45,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:45,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:45,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:45,178 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:5 [2021-06-05 15:58:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:45,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456091662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:45,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:45,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 15:58:45,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498118040] [2021-06-05 15:58:45,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:58:45,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:45,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:58:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:58:45,197 INFO L87 Difference]: Start difference. First operand 54866 states and 195556 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 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) [2021-06-05 15:58:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:47,304 INFO L93 Difference]: Finished difference Result 84208 states and 296986 transitions. [2021-06-05 15:58:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:58:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:47,491 INFO L225 Difference]: With dead ends: 84208 [2021-06-05 15:58:47,491 INFO L226 Difference]: Without dead ends: 84187 [2021-06-05 15:58:47,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1845.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1819, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:58:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84187 states. [2021-06-05 15:58:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84187 to 54891. [2021-06-05 15:58:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54891 states, 54890 states have (on average 3.564201129531791) internal successors, (195639), 54890 states have internal predecessors, (195639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54891 states to 54891 states and 195639 transitions. [2021-06-05 15:58:48,659 INFO L78 Accepts]: Start accepts. Automaton has 54891 states and 195639 transitions. Word has length 37 [2021-06-05 15:58:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 54891 states and 195639 transitions. [2021-06-05 15:58:48,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 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) [2021-06-05 15:58:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 54891 states and 195639 transitions. [2021-06-05 15:58:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:48,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:48,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:48,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 15:58:48,923 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash -760199137, now seen corresponding path program 94 times [2021-06-05 15:58:48,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:48,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101541491] [2021-06-05 15:58:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:49,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:49,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101541491] [2021-06-05 15:58:49,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101541491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:49,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078606602] [2021-06-05 15:58:49,297 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 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 [2021-06-05 15:58:49,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:58:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:49,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:58:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:49,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:58:49,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:49,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 15:58:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:58:49,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:49,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-06-05 15:58:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 59 [2021-06-05 15:58:49,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:49,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:97 [2021-06-05 15:58:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-06-05 15:58:49,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:49,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:68 [2021-06-05 15:58:49,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 15:58:49,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:49,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 15:58:49,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:49,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:49,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 15:58:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078606602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:49,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:49,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:58:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982570311] [2021-06-05 15:58:49,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:58:49,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:58:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:58:49,729 INFO L87 Difference]: Start difference. First operand 54891 states and 195639 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:50,773 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-06-05 15:58:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:52,525 INFO L93 Difference]: Finished difference Result 102057 states and 358865 transitions. [2021-06-05 15:58:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:58:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:52,771 INFO L225 Difference]: With dead ends: 102057 [2021-06-05 15:58:52,771 INFO L226 Difference]: Without dead ends: 102022 [2021-06-05 15:58:52,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1928.4ms TimeCoverageRelationStatistics Valid=352, Invalid=2404, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:58:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102022 states. [2021-06-05 15:58:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102022 to 54891. [2021-06-05 15:58:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54891 states, 54890 states have (on average 3.564201129531791) internal successors, (195639), 54890 states have internal predecessors, (195639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54891 states to 54891 states and 195639 transitions. [2021-06-05 15:58:54,348 INFO L78 Accepts]: Start accepts. Automaton has 54891 states and 195639 transitions. Word has length 37 [2021-06-05 15:58:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:54,348 INFO L482 AbstractCegarLoop]: Abstraction has 54891 states and 195639 transitions. [2021-06-05 15:58:54,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 54891 states and 195639 transitions. [2021-06-05 15:58:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:58:54,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:54,416 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:58:54,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 15:58:54,617 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:54,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash -335251927, now seen corresponding path program 95 times [2021-06-05 15:58:54,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:54,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194572466] [2021-06-05 15:58:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:55,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:55,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194572466] [2021-06-05 15:58:55,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194572466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:55,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823260630] [2021-06-05 15:58:55,040 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 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 [2021-06-05 15:58:55,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:58:55,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:58:55,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:55,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:58:55,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:55,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 15:58:55,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:58:55,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:55,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 15:58:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:55,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:55,409 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:58:55,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 50 [2021-06-05 15:58:55,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:55,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-06-05 15:58:55,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 15:58:55,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:55,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 15:58:55,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:55,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:58:55,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:80, output treesize:37 [2021-06-05 15:58:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:55,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:55,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:55,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 83 [2021-06-05 15:58:55,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 15:58:55,823 INFO L628 ElimStorePlain]: treesize reduction 602, result has 4.3 percent of original size [2021-06-05 15:58:55,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:55,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:21 [2021-06-05 15:58:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:55,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823260630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:55,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:55,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 15:58:55,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923186313] [2021-06-05 15:58:55,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:58:55,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:58:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:58:55,877 INFO L87 Difference]: Start difference. First operand 54891 states and 195639 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:56,746 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 15:58:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:59,479 INFO L93 Difference]: Finished difference Result 86391 states and 303551 transitions. [2021-06-05 15:58:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:58:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:58:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:59,809 INFO L225 Difference]: With dead ends: 86391 [2021-06-05 15:58:59,810 INFO L226 Difference]: Without dead ends: 86235 [2021-06-05 15:58:59,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 2703.4ms TimeCoverageRelationStatistics Valid=515, Invalid=3025, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:58:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86235 states. [2021-06-05 15:59:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86235 to 54891. [2021-06-05 15:59:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54891 states, 54890 states have (on average 3.564201129531791) internal successors, (195639), 54890 states have internal predecessors, (195639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54891 states to 54891 states and 195639 transitions. [2021-06-05 15:59:01,062 INFO L78 Accepts]: Start accepts. Automaton has 54891 states and 195639 transitions. Word has length 37 [2021-06-05 15:59:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:01,062 INFO L482 AbstractCegarLoop]: Abstraction has 54891 states and 195639 transitions. [2021-06-05 15:59:01,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 54891 states and 195639 transitions. [2021-06-05 15:59:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:01,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:01,124 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:01,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:01,324 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2010003491, now seen corresponding path program 96 times [2021-06-05 15:59:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778028702] [2021-06-05 15:59:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:01,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778028702] [2021-06-05 15:59:01,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778028702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568825507] [2021-06-05 15:59:01,759 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 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 [2021-06-05 15:59:01,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:59:01,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:01,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:59:01,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:01,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:59:01,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:01,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:01,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:01,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 15:59:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:01,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:59:01,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:01,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:01,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:01,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-06-05 15:59:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 15:59:02,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:02,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:59:02,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-06-05 15:59:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2021-06-05 15:59:02,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:59:02,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 15:59:02,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:59:02,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:59:02,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:72, output treesize:34 [2021-06-05 15:59:02,248 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_5], 3=[C]} [2021-06-05 15:59:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:59:02,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:02,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:02,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:59:02,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:02,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:02,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:02,273 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:20 [2021-06-05 15:59:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:02,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568825507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:02,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:02,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:59:02,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672284802] [2021-06-05 15:59:02,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:59:02,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:59:02,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:59:02,324 INFO L87 Difference]: Start difference. First operand 54891 states and 195639 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:03,657 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-06-05 15:59:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:05,243 INFO L93 Difference]: Finished difference Result 87388 states and 307139 transitions. [2021-06-05 15:59:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:59:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:05,436 INFO L225 Difference]: With dead ends: 87388 [2021-06-05 15:59:05,436 INFO L226 Difference]: Without dead ends: 87187 [2021-06-05 15:59:05,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2063.8ms TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:59:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87187 states. [2021-06-05 15:59:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87187 to 54946. [2021-06-05 15:59:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54946 states, 54945 states have (on average 3.564054964054964) internal successors, (195827), 54945 states have internal predecessors, (195827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54946 states to 54946 states and 195827 transitions. [2021-06-05 15:59:06,586 INFO L78 Accepts]: Start accepts. Automaton has 54946 states and 195827 transitions. Word has length 37 [2021-06-05 15:59:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 54946 states and 195827 transitions. [2021-06-05 15:59:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 54946 states and 195827 transitions. [2021-06-05 15:59:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:06,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:06,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:06,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 15:59:06,853 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1307326943, now seen corresponding path program 97 times [2021-06-05 15:59:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:06,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85809071] [2021-06-05 15:59:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:07,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:07,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85809071] [2021-06-05 15:59:07,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85809071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:07,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770516169] [2021-06-05 15:59:07,194 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 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 [2021-06-05 15:59:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:07,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:59:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:07,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:07,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:07,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:59:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:07,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:59:07,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:07,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:63 [2021-06-05 15:59:07,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 15:59:07,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:07,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 15:59:07,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:07,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 15:59:07,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:07,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,777 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:22 [2021-06-05 15:59:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:59:07,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:07,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:07,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:59:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:07,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770516169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:07,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:07,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:59:07,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460144963] [2021-06-05 15:59:07,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:59:07,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:07,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:59:07,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:59:07,829 INFO L87 Difference]: Start difference. First operand 54946 states and 195827 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:09,924 INFO L93 Difference]: Finished difference Result 84965 states and 299221 transitions. [2021-06-05 15:59:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:59:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:10,138 INFO L225 Difference]: With dead ends: 84965 [2021-06-05 15:59:10,138 INFO L226 Difference]: Without dead ends: 84844 [2021-06-05 15:59:10,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1348.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:59:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84844 states. [2021-06-05 15:59:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84844 to 54976. [2021-06-05 15:59:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54976 states, 54975 states have (on average 3.5637471577989994) internal successors, (195917), 54975 states have internal predecessors, (195917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54976 states to 54976 states and 195917 transitions. [2021-06-05 15:59:11,379 INFO L78 Accepts]: Start accepts. Automaton has 54976 states and 195917 transitions. Word has length 37 [2021-06-05 15:59:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:11,379 INFO L482 AbstractCegarLoop]: Abstraction has 54976 states and 195917 transitions. [2021-06-05 15:59:11,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54976 states and 195917 transitions. [2021-06-05 15:59:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:11,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:11,441 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:11,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:11,642 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash -955033759, now seen corresponding path program 98 times [2021-06-05 15:59:11,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:11,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704730502] [2021-06-05 15:59:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:12,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704730502] [2021-06-05 15:59:12,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704730502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720988733] [2021-06-05 15:59:12,098 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 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 [2021-06-05 15:59:12,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:12,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:59:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:12,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:59:12,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:59:12,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:59:12,435 INFO L446 ElimStorePlain]: Different costs {3=[v_C_173], 14=[A, B]} [2021-06-05 15:59:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-06-05 15:59:12,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:12,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2021-06-05 15:59:12,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:59:12,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:12,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:12,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2021-06-05 15:59:12,510 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:12,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,521 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:87, output treesize:50 [2021-06-05 15:59:12,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 15:59:12,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:12,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 15:59:12,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:59:12,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:12,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:12,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:29 [2021-06-05 15:59:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:12,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720988733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:12,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:12,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:59:12,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366805936] [2021-06-05 15:59:12,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:59:12,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:59:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:59:12,696 INFO L87 Difference]: Start difference. First operand 54976 states and 195917 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:14,890 INFO L93 Difference]: Finished difference Result 87000 states and 305666 transitions. [2021-06-05 15:59:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:59:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:15,079 INFO L225 Difference]: With dead ends: 87000 [2021-06-05 15:59:15,079 INFO L226 Difference]: Without dead ends: 86785 [2021-06-05 15:59:15,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1672.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:59:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86785 states. [2021-06-05 15:59:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86785 to 55006. [2021-06-05 15:59:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55006 states, 55005 states have (on average 3.5633306063085173) internal successors, (196001), 55005 states have internal predecessors, (196001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55006 states to 55006 states and 196001 transitions. [2021-06-05 15:59:16,218 INFO L78 Accepts]: Start accepts. Automaton has 55006 states and 196001 transitions. Word has length 37 [2021-06-05 15:59:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:16,219 INFO L482 AbstractCegarLoop]: Abstraction has 55006 states and 196001 transitions. [2021-06-05 15:59:16,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 55006 states and 196001 transitions. [2021-06-05 15:59:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:16,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:16,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:16,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:16,485 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1082921747, now seen corresponding path program 99 times [2021-06-05 15:59:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:16,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508963307] [2021-06-05 15:59:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:16,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:16,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508963307] [2021-06-05 15:59:16,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508963307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:16,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366802198] [2021-06-05 15:59:16,720 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 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 [2021-06-05 15:59:16,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:59:16,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:59:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:16,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:16,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:16,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:16,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:16,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 15:59:16,895 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 15:59:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:59:16,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:16,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:16,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:16,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 15:59:17,091 INFO L446 ElimStorePlain]: Different costs {3=[v_C_176], 9=[A, B]} [2021-06-05 15:59:17,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:17,105 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-06-05 15:59:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 46 [2021-06-05 15:59:17,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:17,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:17,434 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-06-05 15:59:17,434 INFO L354 Elim1Store]: treesize reduction 18, result has 70.5 percent of original size [2021-06-05 15:59:17,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 80 [2021-06-05 15:59:17,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:59:17,534 INFO L628 ElimStorePlain]: treesize reduction 224, result has 36.4 percent of original size [2021-06-05 15:59:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:17,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 106 treesize of output 144 [2021-06-05 15:59:17,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 5 xjuncts. [2021-06-05 15:59:17,837 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2021-06-05 15:59:17,838 INFO L628 ElimStorePlain]: treesize reduction 725, result has 14.2 percent of original size [2021-06-05 15:59:17,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:59:17,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:87, output treesize:167 [2021-06-05 15:59:18,402 INFO L446 ElimStorePlain]: Different costs {0=[C], 7=[v_prenex_8]} [2021-06-05 15:59:18,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:59:18,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:18,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:18,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:59:18,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:18,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:18,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:18,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:20 [2021-06-05 15:59:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366802198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:18,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:18,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2021-06-05 15:59:18,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339448034] [2021-06-05 15:59:18,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:59:18,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:59:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:59:18,487 INFO L87 Difference]: Start difference. First operand 55006 states and 196001 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:21,682 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2021-06-05 15:59:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:22,826 INFO L93 Difference]: Finished difference Result 85189 states and 299640 transitions. [2021-06-05 15:59:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:59:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:23,017 INFO L225 Difference]: With dead ends: 85189 [2021-06-05 15:59:23,017 INFO L226 Difference]: Without dead ends: 85139 [2021-06-05 15:59:23,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2905.4ms TimeCoverageRelationStatistics Valid=397, Invalid=3263, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:59:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85139 states. [2021-06-05 15:59:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85139 to 55006. [2021-06-05 15:59:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55006 states, 55005 states have (on average 3.563639669120989) internal successors, (196018), 55005 states have internal predecessors, (196018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55006 states to 55006 states and 196018 transitions. [2021-06-05 15:59:24,094 INFO L78 Accepts]: Start accepts. Automaton has 55006 states and 196018 transitions. Word has length 37 [2021-06-05 15:59:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:24,094 INFO L482 AbstractCegarLoop]: Abstraction has 55006 states and 196018 transitions. [2021-06-05 15:59:24,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55006 states and 196018 transitions. [2021-06-05 15:59:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:24,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:24,325 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:24,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:24,528 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash 509494781, now seen corresponding path program 100 times [2021-06-05 15:59:24,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:24,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15852445] [2021-06-05 15:59:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:24,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:24,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15852445] [2021-06-05 15:59:24,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15852445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:24,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242776784] [2021-06-05 15:59:24,859 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 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 [2021-06-05 15:59:24,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:24,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:59:24,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:24,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:59:24,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:24,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:24,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:24,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:59:25,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:25,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-06-05 15:59:25,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:25,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:65 [2021-06-05 15:59:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 15:59:25,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:25,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-06-05 15:59:25,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 15:59:25,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:25,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:43 [2021-06-05 15:59:25,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 15:59:25,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:25,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 15:59:25,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:25,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:25,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 15:59:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242776784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:25,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:25,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:59:25,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141699335] [2021-06-05 15:59:25,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:59:25,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:59:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:59:25,267 INFO L87 Difference]: Start difference. First operand 55006 states and 196018 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 15:59:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:27,292 INFO L93 Difference]: Finished difference Result 84666 states and 298472 transitions. [2021-06-05 15:59:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:59:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:27,475 INFO L225 Difference]: With dead ends: 84666 [2021-06-05 15:59:27,475 INFO L226 Difference]: Without dead ends: 84639 [2021-06-05 15:59:27,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1155.9ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:59:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84639 states. [2021-06-05 15:59:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84639 to 55088. [2021-06-05 15:59:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55088 states, 55087 states have (on average 3.5632000290449652) internal successors, (196286), 55087 states have internal predecessors, (196286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55088 states to 55088 states and 196286 transitions. [2021-06-05 15:59:28,679 INFO L78 Accepts]: Start accepts. Automaton has 55088 states and 196286 transitions. Word has length 37 [2021-06-05 15:59:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:28,679 INFO L482 AbstractCegarLoop]: Abstraction has 55088 states and 196286 transitions. [2021-06-05 15:59:28,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 15:59:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 55088 states and 196286 transitions. [2021-06-05 15:59:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:28,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:28,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:28,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 15:59:28,942 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:28,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:28,943 INFO L82 PathProgramCache]: Analyzing trace with hash -609300511, now seen corresponding path program 101 times [2021-06-05 15:59:28,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:28,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300181053] [2021-06-05 15:59:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:29,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:29,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300181053] [2021-06-05 15:59:29,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300181053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:29,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316223465] [2021-06-05 15:59:29,249 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 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 [2021-06-05 15:59:29,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:59:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:29,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:59:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:29,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:29,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 15:59:29,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:59:29,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:29,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-06-05 15:59:29,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 15:59:29,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:29,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-06-05 15:59:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 15:59:29,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:29,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 15:59:29,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:29,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:29,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:59:29,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:40 [2021-06-05 15:59:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:29,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 87 [2021-06-05 15:59:30,221 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 57 [2021-06-05 15:59:30,382 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 1 dim-0 vars, and 4 xjuncts. [2021-06-05 15:59:30,672 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 37 [2021-06-05 15:59:30,672 INFO L628 ElimStorePlain]: treesize reduction 1469, result has 3.9 percent of original size [2021-06-05 15:59:30,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:30,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:35 [2021-06-05 15:59:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:30,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316223465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:30,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:30,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:59:30,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764528594] [2021-06-05 15:59:30,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:59:30,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:30,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:59:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:59:30,728 INFO L87 Difference]: Start difference. First operand 55088 states and 196286 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:33,313 INFO L93 Difference]: Finished difference Result 85853 states and 301945 transitions. [2021-06-05 15:59:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:59:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:33,513 INFO L225 Difference]: With dead ends: 85853 [2021-06-05 15:59:33,514 INFO L226 Difference]: Without dead ends: 85694 [2021-06-05 15:59:33,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1592.1ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:59:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85694 states. [2021-06-05 15:59:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85694 to 55108. [2021-06-05 15:59:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55108 states, 55107 states have (on average 3.5630682127497413) internal successors, (196350), 55107 states have internal predecessors, (196350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55108 states to 55108 states and 196350 transitions. [2021-06-05 15:59:34,651 INFO L78 Accepts]: Start accepts. Automaton has 55108 states and 196350 transitions. Word has length 37 [2021-06-05 15:59:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:34,651 INFO L482 AbstractCegarLoop]: Abstraction has 55108 states and 196350 transitions. [2021-06-05 15:59:34,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 55108 states and 196350 transitions. [2021-06-05 15:59:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:34,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:34,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:34,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 15:59:34,914 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1735954907, now seen corresponding path program 102 times [2021-06-05 15:59:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:34,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381839265] [2021-06-05 15:59:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:35,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:35,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381839265] [2021-06-05 15:59:35,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381839265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:35,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068597247] [2021-06-05 15:59:35,229 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 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 [2021-06-05 15:59:35,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:59:35,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:59:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:35,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:35,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 15:59:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:35,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:59:35,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-06-05 15:59:35,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 15:59:35,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-06-05 15:59:35,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 58 [2021-06-05 15:59:35,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 94 [2021-06-05 15:59:35,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:59:35,721 INFO L628 ElimStorePlain]: treesize reduction 32, result has 75.8 percent of original size [2021-06-05 15:59:35,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:241 [2021-06-05 15:59:35,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:35,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 15:59:35,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:35,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:35,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 52 [2021-06-05 15:59:35,985 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:59:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:35,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:35,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:35,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:35,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2021-06-05 15:59:35,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:36,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:36,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:36,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 15:59:36,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:36,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:36,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-05 15:59:36,054 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:59:36,311 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 27 [2021-06-05 15:59:36,311 INFO L628 ElimStorePlain]: treesize reduction 292, result has 17.0 percent of original size [2021-06-05 15:59:36,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:59:36,314 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:193, output treesize:49 [2021-06-05 15:59:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068597247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:36,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:36,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 15:59:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707993618] [2021-06-05 15:59:36,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:59:36,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:59:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:59:36,431 INFO L87 Difference]: Start difference. First operand 55108 states and 196350 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:38,989 INFO L93 Difference]: Finished difference Result 85851 states and 301911 transitions. [2021-06-05 15:59:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:59:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:39,166 INFO L225 Difference]: With dead ends: 85851 [2021-06-05 15:59:39,166 INFO L226 Difference]: Without dead ends: 85665 [2021-06-05 15:59:39,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1884.5ms TimeCoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:59:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85665 states. [2021-06-05 15:59:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85665 to 55162. [2021-06-05 15:59:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55162 states, 55161 states have (on average 3.5626982832073386) internal successors, (196522), 55161 states have internal predecessors, (196522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55162 states to 55162 states and 196522 transitions. [2021-06-05 15:59:40,344 INFO L78 Accepts]: Start accepts. Automaton has 55162 states and 196522 transitions. Word has length 37 [2021-06-05 15:59:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:40,344 INFO L482 AbstractCegarLoop]: Abstraction has 55162 states and 196522 transitions. [2021-06-05 15:59:40,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 55162 states and 196522 transitions. [2021-06-05 15:59:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:40,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:40,405 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:40,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-05 15:59:40,613 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1287858783, now seen corresponding path program 103 times [2021-06-05 15:59:40,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:40,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601393704] [2021-06-05 15:59:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:40,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601393704] [2021-06-05 15:59:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601393704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582885581] [2021-06-05 15:59:40,937 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 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 [2021-06-05 15:59:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:59:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:41,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:41,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 15:59:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 15:59:41,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-06-05 15:59:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 15:59:41,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:81 [2021-06-05 15:59:41,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2021-06-05 15:59:41,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:41,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2021-06-05 15:59:41,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:28 [2021-06-05 15:59:41,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:59:41,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 15:59:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:41,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582885581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:41,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:41,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 15:59:41,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336521705] [2021-06-05 15:59:41,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:59:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:59:41,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:59:41,339 INFO L87 Difference]: Start difference. First operand 55162 states and 196522 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:43,346 INFO L93 Difference]: Finished difference Result 84690 states and 298520 transitions. [2021-06-05 15:59:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:59:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:43,534 INFO L225 Difference]: With dead ends: 84690 [2021-06-05 15:59:43,534 INFO L226 Difference]: Without dead ends: 84663 [2021-06-05 15:59:43,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1081.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:59:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84663 states. [2021-06-05 15:59:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84663 to 55216. [2021-06-05 15:59:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55216 states, 55215 states have (on average 3.5626369645929548) internal successors, (196711), 55215 states have internal predecessors, (196711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55216 states to 55216 states and 196711 transitions. [2021-06-05 15:59:44,685 INFO L78 Accepts]: Start accepts. Automaton has 55216 states and 196711 transitions. Word has length 37 [2021-06-05 15:59:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:44,686 INFO L482 AbstractCegarLoop]: Abstraction has 55216 states and 196711 transitions. [2021-06-05 15:59:44,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 55216 states and 196711 transitions. [2021-06-05 15:59:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:44,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:44,749 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:44,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:44,953 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash -422090193, now seen corresponding path program 104 times [2021-06-05 15:59:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:44,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951024984] [2021-06-05 15:59:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:45,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:45,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951024984] [2021-06-05 15:59:45,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951024984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:45,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914635242] [2021-06-05 15:59:45,320 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 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 [2021-06-05 15:59:45,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:45,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:59:45,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:45,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 15:59:45,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:45,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 15:59:45,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:59:45,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-06-05 15:59:45,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:45,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:75 [2021-06-05 15:59:45,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 15:59:45,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:45,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 15:59:45,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:45,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-06-05 15:59:45,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:45,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,622 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:70, output treesize:24 [2021-06-05 15:59:45,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 41 [2021-06-05 15:59:45,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:59:45,709 INFO L628 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2021-06-05 15:59:45,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:45,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 15:59:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914635242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:45,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:45,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:59:45,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885078487] [2021-06-05 15:59:45,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:59:45,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:45,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:59:45,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:59:45,753 INFO L87 Difference]: Start difference. First operand 55216 states and 196711 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:48,661 INFO L93 Difference]: Finished difference Result 85984 states and 302320 transitions. [2021-06-05 15:59:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:59:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:49,042 INFO L225 Difference]: With dead ends: 85984 [2021-06-05 15:59:49,042 INFO L226 Difference]: Without dead ends: 85735 [2021-06-05 15:59:49,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2006.8ms TimeCoverageRelationStatistics Valid=520, Invalid=2560, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:59:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85735 states. [2021-06-05 15:59:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85735 to 55274. [2021-06-05 15:59:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55274 states, 55273 states have (on average 3.5622998570730737) internal successors, (196899), 55273 states have internal predecessors, (196899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55274 states to 55274 states and 196899 transitions. [2021-06-05 15:59:50,239 INFO L78 Accepts]: Start accepts. Automaton has 55274 states and 196899 transitions. Word has length 37 [2021-06-05 15:59:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:50,239 INFO L482 AbstractCegarLoop]: Abstraction has 55274 states and 196899 transitions. [2021-06-05 15:59:50,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 55274 states and 196899 transitions. [2021-06-05 15:59:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:50,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:50,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:50,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 15:59:50,504 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1592894157, now seen corresponding path program 105 times [2021-06-05 15:59:50,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:50,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839842076] [2021-06-05 15:59:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:50,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:50,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839842076] [2021-06-05 15:59:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839842076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:50,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417247463] [2021-06-05 15:59:50,830 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 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 [2021-06-05 15:59:50,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:59:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:50,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 15:59:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:50,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 15:59:50,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:50,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:50,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:50,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 15:59:51,037 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-06-05 15:59:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 15:59:51,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:51,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:51,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:51,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:92 [2021-06-05 15:59:51,363 INFO L446 ElimStorePlain]: Different costs {6=[v_C_194], 7=[A, B]} [2021-06-05 15:59:51,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:51,382 INFO L354 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2021-06-05 15:59:51,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 61 [2021-06-05 15:59:51,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:51,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:51,440 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 15:59:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 74 [2021-06-05 15:59:51,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:51,488 INFO L628 ElimStorePlain]: treesize reduction 56, result has 57.3 percent of original size [2021-06-05 15:59:51,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:51,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:51,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:51,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 74 [2021-06-05 15:59:51,549 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:59:51,602 INFO L628 ElimStorePlain]: treesize reduction 133, result has 32.1 percent of original size [2021-06-05 15:59:51,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 15:59:51,621 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:99, output treesize:60 [2021-06-05 15:59:51,997 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_9]} [2021-06-05 15:59:52,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:52,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-06-05 15:59:52,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:59:52,071 INFO L628 ElimStorePlain]: treesize reduction 20, result has 81.1 percent of original size [2021-06-05 15:59:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:52,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:52,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 85 [2021-06-05 15:59:52,350 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 167 [2021-06-05 15:59:52,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 15:59:52,637 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 62 [2021-06-05 15:59:52,637 INFO L628 ElimStorePlain]: treesize reduction 875, result has 12.4 percent of original size [2021-06-05 15:59:52,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:52,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:89, output treesize:94 [2021-06-05 15:59:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:52,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417247463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:52,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:52,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 15:59:52,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853253988] [2021-06-05 15:59:52,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:59:52,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:52,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:59:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:59:52,714 INFO L87 Difference]: Start difference. First operand 55274 states and 196899 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:57,986 INFO L93 Difference]: Finished difference Result 90561 states and 316721 transitions. [2021-06-05 15:59:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:59:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:59:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:58,181 INFO L225 Difference]: With dead ends: 90561 [2021-06-05 15:59:58,181 INFO L226 Difference]: Without dead ends: 90161 [2021-06-05 15:59:58,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 4064.2ms TimeCoverageRelationStatistics Valid=901, Invalid=7109, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:59:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90161 states. [2021-06-05 15:59:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90161 to 55438. [2021-06-05 15:59:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55438 states, 55437 states have (on average 3.562277901040821) internal successors, (197482), 55437 states have internal predecessors, (197482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55438 states to 55438 states and 197482 transitions. [2021-06-05 15:59:59,372 INFO L78 Accepts]: Start accepts. Automaton has 55438 states and 197482 transitions. Word has length 37 [2021-06-05 15:59:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:59,373 INFO L482 AbstractCegarLoop]: Abstraction has 55438 states and 197482 transitions. [2021-06-05 15:59:59,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 55438 states and 197482 transitions. [2021-06-05 15:59:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:59:59,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:59,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:59,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:59,811 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 385638647, now seen corresponding path program 106 times [2021-06-05 15:59:59,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:59,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324333933] [2021-06-05 15:59:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:00,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324333933] [2021-06-05 16:00:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324333933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019909830] [2021-06-05 16:00:00,131 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 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 [2021-06-05 16:00:00,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:00,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:00:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:00,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:00:00,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:00,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:00:00,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:00:00,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:00,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 16:00:00,433 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 3=[v_C_197]} [2021-06-05 16:00:00,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 16:00:00,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:00,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 16:00:00,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:00,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:00,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:00,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2021-06-05 16:00:00,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:00,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:73, output treesize:29 [2021-06-05 16:00:00,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 16:00:00,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:00,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:00,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:00:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:00,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019909830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:00,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:00,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:00:00,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193489440] [2021-06-05 16:00:00,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:00:00,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:00,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:00:00,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:00:00,506 INFO L87 Difference]: Start difference. First operand 55438 states and 197482 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:02,458 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 16:00:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:03,530 INFO L93 Difference]: Finished difference Result 88666 states and 310875 transitions. [2021-06-05 16:00:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:00:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:03,735 INFO L225 Difference]: With dead ends: 88666 [2021-06-05 16:00:03,735 INFO L226 Difference]: Without dead ends: 88480 [2021-06-05 16:00:03,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2038.6ms TimeCoverageRelationStatistics Valid=528, Invalid=2664, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:00:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88480 states. [2021-06-05 16:00:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88480 to 55500. [2021-06-05 16:00:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55500 states, 55499 states have (on average 3.5626227499594587) internal successors, (197722), 55499 states have internal predecessors, (197722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55500 states to 55500 states and 197722 transitions. [2021-06-05 16:00:04,957 INFO L78 Accepts]: Start accepts. Automaton has 55500 states and 197722 transitions. Word has length 37 [2021-06-05 16:00:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:04,957 INFO L482 AbstractCegarLoop]: Abstraction has 55500 states and 197722 transitions. [2021-06-05 16:00:04,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 55500 states and 197722 transitions. [2021-06-05 16:00:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:05,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:05,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:05,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 16:00:05,226 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1998898743, now seen corresponding path program 107 times [2021-06-05 16:00:05,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:05,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326933273] [2021-06-05 16:00:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:05,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326933273] [2021-06-05 16:00:05,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326933273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:05,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869572596] [2021-06-05 16:00:05,573 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 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 [2021-06-05 16:00:05,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:00:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 16:00:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:05,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:00:05,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:05,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:05,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:05,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:00:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:05,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:00:05,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2021-06-05 16:00:05,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:05,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:05,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:05,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:63 [2021-06-05 16:00:05,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:05,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:05,980 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:00:05,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 48 [2021-06-05 16:00:05,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:05,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:05,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:05,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:71 [2021-06-05 16:00:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 16:00:06,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:06,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 16:00:06,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:06,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:06,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:06,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:40 [2021-06-05 16:00:06,388 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 16:00:06,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:06,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:06,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:06,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 87 [2021-06-05 16:00:06,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 16:00:06,877 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 37 [2021-06-05 16:00:06,877 INFO L628 ElimStorePlain]: treesize reduction 1228, result has 4.3 percent of original size [2021-06-05 16:00:06,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:06,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:21 [2021-06-05 16:00:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:06,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869572596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:06,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:06,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 16:00:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114458895] [2021-06-05 16:00:06,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:00:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:00:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:00:06,937 INFO L87 Difference]: Start difference. First operand 55500 states and 197722 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:10,701 INFO L93 Difference]: Finished difference Result 88185 states and 309390 transitions. [2021-06-05 16:00:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:00:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:10,902 INFO L225 Difference]: With dead ends: 88185 [2021-06-05 16:00:10,902 INFO L226 Difference]: Without dead ends: 88029 [2021-06-05 16:00:10,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2913.4ms TimeCoverageRelationStatistics Valid=669, Invalid=3753, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:00:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88029 states. [2021-06-05 16:00:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88029 to 55486. [2021-06-05 16:00:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55486 states, 55485 states have (on average 3.562962962962963) internal successors, (197691), 55485 states have internal predecessors, (197691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55486 states to 55486 states and 197691 transitions. [2021-06-05 16:00:12,087 INFO L78 Accepts]: Start accepts. Automaton has 55486 states and 197691 transitions. Word has length 37 [2021-06-05 16:00:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:12,087 INFO L482 AbstractCegarLoop]: Abstraction has 55486 states and 197691 transitions. [2021-06-05 16:00:12,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 55486 states and 197691 transitions. [2021-06-05 16:00:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:12,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:12,153 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:12,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 16:00:12,357 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1033411687, now seen corresponding path program 108 times [2021-06-05 16:00:12,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:12,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481742464] [2021-06-05 16:00:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:12,544 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-06-05 16:00:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481742464] [2021-06-05 16:00:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481742464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342106896] [2021-06-05 16:00:12,849 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 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 [2021-06-05 16:00:12,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:00:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 16:00:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:00:12,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:12,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:12,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:12,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 16:00:13,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:13,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:00:13,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:13,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:13,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:13,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:55 [2021-06-05 16:00:13,251 INFO L446 ElimStorePlain]: Different costs {2=[v_C_203], 5=[A, B]} [2021-06-05 16:00:13,268 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:00:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 50 [2021-06-05 16:00:13,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:13,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:13,313 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:00:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 68 [2021-06-05 16:00:13,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:13,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:13,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:13,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 98 [2021-06-05 16:00:13,384 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:00:13,458 INFO L628 ElimStorePlain]: treesize reduction 82, result has 56.4 percent of original size [2021-06-05 16:00:13,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:13,495 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:87, output treesize:176 [2021-06-05 16:00:14,054 INFO L446 ElimStorePlain]: Different costs {2=[C, v_prenex_15], 5=[v_prenex_19, v_prenex_14, v_prenex_12, v_prenex_17]} [2021-06-05 16:00:14,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 16:00:14,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:14,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:00:14,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:14,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:00:14,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:14,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,261 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:00:14,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 16:00:14,262 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:00:14,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:00:14,315 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:14,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,384 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:00:14,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-06-05 16:00:14,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 16:00:14,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:14,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:00:14,581 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:244, output treesize:289 [2021-06-05 16:00:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:14,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342106896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:14,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:14,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 16:00:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725473789] [2021-06-05 16:00:14,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:00:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:14,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:00:14,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:00:14,672 INFO L87 Difference]: Start difference. First operand 55486 states and 197691 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:15,295 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2021-06-05 16:00:16,751 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2021-06-05 16:00:16,993 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 16:00:19,577 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 16:00:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:22,860 INFO L93 Difference]: Finished difference Result 104029 states and 361730 transitions. [2021-06-05 16:00:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 16:00:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:23,111 INFO L225 Difference]: With dead ends: 104029 [2021-06-05 16:00:23,111 INFO L226 Difference]: Without dead ends: 103747 [2021-06-05 16:00:23,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3886 ImplicationChecksByTransitivity, 6071.6ms TimeCoverageRelationStatistics Valid=1457, Invalid=10099, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 16:00:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103747 states. [2021-06-05 16:00:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103747 to 57578. [2021-06-05 16:00:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57578 states, 57577 states have (on average 3.5702971672716535) internal successors, (205567), 57577 states have internal predecessors, (205567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57578 states to 57578 states and 205567 transitions. [2021-06-05 16:00:24,521 INFO L78 Accepts]: Start accepts. Automaton has 57578 states and 205567 transitions. Word has length 37 [2021-06-05 16:00:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:24,521 INFO L482 AbstractCegarLoop]: Abstraction has 57578 states and 205567 transitions. [2021-06-05 16:00:24,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57578 states and 205567 transitions. [2021-06-05 16:00:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:24,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:24,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:24,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable823 [2021-06-05 16:00:24,791 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash 672792637, now seen corresponding path program 109 times [2021-06-05 16:00:24,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:24,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079668931] [2021-06-05 16:00:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:25,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:25,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079668931] [2021-06-05 16:00:25,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079668931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:25,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20317959] [2021-06-05 16:00:25,139 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 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 [2021-06-05 16:00:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:00:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:25,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:00:25,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:25,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:00:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:25,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:00:25,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:25,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:59 [2021-06-05 16:00:25,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 16:00:25,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:00:25,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:25,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-06-05 16:00:25,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:25,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,446 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:72, output treesize:22 [2021-06-05 16:00:25,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 16:00:25,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:25,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:25,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:00:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:25,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20317959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:25,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:25,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:00:25,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175175671] [2021-06-05 16:00:25,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:00:25,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:00:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:00:25,492 INFO L87 Difference]: Start difference. First operand 57578 states and 205567 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:26,499 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 16:00:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:30,075 INFO L93 Difference]: Finished difference Result 102389 states and 357464 transitions. [2021-06-05 16:00:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:00:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:30,351 INFO L225 Difference]: With dead ends: 102389 [2021-06-05 16:00:30,352 INFO L226 Difference]: Without dead ends: 102146 [2021-06-05 16:00:30,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 3560.0ms TimeCoverageRelationStatistics Valid=1181, Invalid=5625, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:00:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102146 states. [2021-06-05 16:00:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102146 to 58701. [2021-06-05 16:00:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58701 states, 58700 states have (on average 3.573083475298126) internal successors, (209740), 58700 states have internal predecessors, (209740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58701 states to 58701 states and 209740 transitions. [2021-06-05 16:00:31,725 INFO L78 Accepts]: Start accepts. Automaton has 58701 states and 209740 transitions. Word has length 37 [2021-06-05 16:00:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:31,725 INFO L482 AbstractCegarLoop]: Abstraction has 58701 states and 209740 transitions. [2021-06-05 16:00:31,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 58701 states and 209740 transitions. [2021-06-05 16:00:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:31,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:31,796 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:31,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-05 16:00:31,996 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1699906867, now seen corresponding path program 110 times [2021-06-05 16:00:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:31,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406853739] [2021-06-05 16:00:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:32,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:32,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406853739] [2021-06-05 16:00:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406853739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225682564] [2021-06-05 16:00:32,374 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 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 [2021-06-05 16:00:32,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:32,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:00:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:00:32,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:32,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 16:00:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:32,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 16:00:32,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:32,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:80 [2021-06-05 16:00:32,630 INFO L446 ElimStorePlain]: Different costs {3=[v_C_209], 12=[A, B]} [2021-06-05 16:00:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:00:32,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:32,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:32,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-06-05 16:00:32,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:32,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:32,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:32,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:32,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-06-05 16:00:32,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:32,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,666 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:29 [2021-06-05 16:00:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:00:32,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:32,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:32,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:00:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:32,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225682564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:32,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:32,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 16:00:32,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040320015] [2021-06-05 16:00:32,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:00:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:00:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:00:32,743 INFO L87 Difference]: Start difference. First operand 58701 states and 209740 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:35,312 INFO L93 Difference]: Finished difference Result 90387 states and 319513 transitions. [2021-06-05 16:00:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:00:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:35,753 INFO L225 Difference]: With dead ends: 90387 [2021-06-05 16:00:35,753 INFO L226 Difference]: Without dead ends: 90146 [2021-06-05 16:00:35,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1591.4ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:00:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90146 states. [2021-06-05 16:00:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90146 to 58678. [2021-06-05 16:00:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58678 states, 58677 states have (on average 3.5736489595582595) internal successors, (209691), 58677 states have internal predecessors, (209691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58678 states to 58678 states and 209691 transitions. [2021-06-05 16:00:37,066 INFO L78 Accepts]: Start accepts. Automaton has 58678 states and 209691 transitions. Word has length 37 [2021-06-05 16:00:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:37,066 INFO L482 AbstractCegarLoop]: Abstraction has 58678 states and 209691 transitions. [2021-06-05 16:00:37,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 58678 states and 209691 transitions. [2021-06-05 16:00:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:37,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:37,134 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:37,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:37,335 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:37,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1693345553, now seen corresponding path program 111 times [2021-06-05 16:00:37,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:37,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952582249] [2021-06-05 16:00:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:37,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952582249] [2021-06-05 16:00:37,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952582249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794982435] [2021-06-05 16:00:37,742 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 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 [2021-06-05 16:00:37,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:00:37,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:37,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 16:00:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:00:37,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:37,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:37,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:37,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 16:00:37,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:37,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-06-05 16:00:37,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:38,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:38,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:78 [2021-06-05 16:00:38,158 INFO L446 ElimStorePlain]: Different costs {3=[v_C_212], 14=[A, B]} [2021-06-05 16:00:38,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-06-05 16:00:38,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:38,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:38,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 61 [2021-06-05 16:00:38,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:38,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:00:38,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:38,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 40 [2021-06-05 16:00:38,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:00:38,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:38,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:46 [2021-06-05 16:00:38,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:00:38,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:38,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:38,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:38,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-06-05 16:00:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794982435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:38,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:38,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 16:00:38,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148515049] [2021-06-05 16:00:38,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:00:38,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:38,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:00:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:00:38,401 INFO L87 Difference]: Start difference. First operand 58678 states and 209691 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:42,017 INFO L93 Difference]: Finished difference Result 91318 states and 322400 transitions. [2021-06-05 16:00:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:00:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:42,229 INFO L225 Difference]: With dead ends: 91318 [2021-06-05 16:00:42,229 INFO L226 Difference]: Without dead ends: 91100 [2021-06-05 16:00:42,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 2747.3ms TimeCoverageRelationStatistics Valid=447, Invalid=2859, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:00:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91100 states. [2021-06-05 16:00:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91100 to 58672. [2021-06-05 16:00:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58672 states, 58671 states have (on average 3.5737076238686916) internal successors, (209673), 58671 states have internal predecessors, (209673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58672 states to 58672 states and 209673 transitions. [2021-06-05 16:00:43,767 INFO L78 Accepts]: Start accepts. Automaton has 58672 states and 209673 transitions. Word has length 37 [2021-06-05 16:00:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:43,767 INFO L482 AbstractCegarLoop]: Abstraction has 58672 states and 209673 transitions. [2021-06-05 16:00:43,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 58672 states and 209673 transitions. [2021-06-05 16:00:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:43,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:43,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:44,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:44,043 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1364528545, now seen corresponding path program 112 times [2021-06-05 16:00:44,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:44,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531285966] [2021-06-05 16:00:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:44,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531285966] [2021-06-05 16:00:44,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531285966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912523923] [2021-06-05 16:00:44,408 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 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 [2021-06-05 16:00:44,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:00:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:00:44,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 16:00:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:00:44,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-06-05 16:00:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 16:00:44,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 16:00:44,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-06-05 16:00:44,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:23 [2021-06-05 16:00:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:00:44,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:44,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:44,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:00:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:44,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912523923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:44,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:44,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:00:44,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609085407] [2021-06-05 16:00:44,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:00:44,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:44,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:00:44,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:00:44,797 INFO L87 Difference]: Start difference. First operand 58672 states and 209673 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:47,804 INFO L93 Difference]: Finished difference Result 95700 states and 336984 transitions. [2021-06-05 16:00:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:00:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:48,028 INFO L225 Difference]: With dead ends: 95700 [2021-06-05 16:00:48,028 INFO L226 Difference]: Without dead ends: 95500 [2021-06-05 16:00:48,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2067.6ms TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:00:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95500 states. [2021-06-05 16:00:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95500 to 59194. [2021-06-05 16:00:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59194 states, 59193 states have (on average 3.573817850083625) internal successors, (211545), 59193 states have internal predecessors, (211545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59194 states to 59194 states and 211545 transitions. [2021-06-05 16:00:49,328 INFO L78 Accepts]: Start accepts. Automaton has 59194 states and 211545 transitions. Word has length 37 [2021-06-05 16:00:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:49,329 INFO L482 AbstractCegarLoop]: Abstraction has 59194 states and 211545 transitions. [2021-06-05 16:00:49,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 59194 states and 211545 transitions. [2021-06-05 16:00:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:49,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:49,398 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:49,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 16:00:49,599 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash -702153113, now seen corresponding path program 113 times [2021-06-05 16:00:49,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:49,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194674199] [2021-06-05 16:00:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:49,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:49,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194674199] [2021-06-05 16:00:49,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194674199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:49,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818908941] [2021-06-05 16:00:49,929 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 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 [2021-06-05 16:00:49,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:00:49,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:49,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 16:00:49,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:50,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:00:50,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-06-05 16:00:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:50,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:00:50,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-06-05 16:00:50,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 16:00:50,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 16:00:50,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-06-05 16:00:50,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,527 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:23 [2021-06-05 16:00:50,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:00:50,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:50,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:50,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:00:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:50,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818908941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:50,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:50,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 16:00:50,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118411620] [2021-06-05 16:00:50,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:00:50,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:50,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:00:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:00:50,606 INFO L87 Difference]: Start difference. First operand 59194 states and 211545 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:53,690 INFO L93 Difference]: Finished difference Result 94537 states and 332961 transitions. [2021-06-05 16:00:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:00:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:00:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:53,899 INFO L225 Difference]: With dead ends: 94537 [2021-06-05 16:00:53,899 INFO L226 Difference]: Without dead ends: 94345 [2021-06-05 16:00:53,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2078.9ms TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:00:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94345 states. [2021-06-05 16:00:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94345 to 59404. [2021-06-05 16:00:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59404 states, 59403 states have (on average 3.5728330219012507) internal successors, (212237), 59403 states have internal predecessors, (212237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59404 states to 59404 states and 212237 transitions. [2021-06-05 16:00:55,197 INFO L78 Accepts]: Start accepts. Automaton has 59404 states and 212237 transitions. Word has length 37 [2021-06-05 16:00:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:55,197 INFO L482 AbstractCegarLoop]: Abstraction has 59404 states and 212237 transitions. [2021-06-05 16:00:55,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 59404 states and 212237 transitions. [2021-06-05 16:00:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:00:55,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:55,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:00:55,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 16:00:55,470 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1988835553, now seen corresponding path program 114 times [2021-06-05 16:00:55,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:55,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266240316] [2021-06-05 16:00:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:55,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:55,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266240316] [2021-06-05 16:00:55,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266240316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:55,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559184201] [2021-06-05 16:00:55,795 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 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 [2021-06-05 16:00:55,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:00:55,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:00:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:55,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:00:55,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:55,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:55,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:55,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 16:00:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 16:00:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:55,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:55,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:55,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:58 [2021-06-05 16:00:56,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 16:00:56,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:56,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:56,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:56,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:72 [2021-06-05 16:00:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:56,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 82 [2021-06-05 16:00:56,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:00:56,469 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 84 [2021-06-05 16:00:56,469 INFO L628 ElimStorePlain]: treesize reduction 233, result has 46.9 percent of original size [2021-06-05 16:00:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:56,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 197 [2021-06-05 16:00:57,062 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:00:57,462 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 80 [2021-06-05 16:00:57,463 INFO L628 ElimStorePlain]: treesize reduction 1910, result has 9.1 percent of original size [2021-06-05 16:00:57,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:00:57,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:87, output treesize:90 [2021-06-05 16:00:57,723 INFO L446 ElimStorePlain]: Different costs {2=[C, v_prenex_21, v_prenex_20, v_prenex_23], 5=[v_prenex_22]} [2021-06-05 16:00:57,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:57,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 16:00:57,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:57,877 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:00:57,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:57,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:57,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 16:00:57,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:57,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:57,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 16:00:57,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 16:00:57,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:58,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:58,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 16:00:58,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 16:00:58,155 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 16:00:58,155 INFO L628 ElimStorePlain]: treesize reduction 72, result has 65.7 percent of original size [2021-06-05 16:00:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:58,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:58,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 16:00:58,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 3 xjuncts. [2021-06-05 16:00:58,257 INFO L628 ElimStorePlain]: treesize reduction 37, result has 76.7 percent of original size [2021-06-05 16:00:58,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:00:58,261 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:184, output treesize:104 [2021-06-05 16:00:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:58,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559184201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:58,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:58,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 16:00:58,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980765737] [2021-06-05 16:00:58,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:00:58,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:58,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:00:58,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:00:58,379 INFO L87 Difference]: Start difference. First operand 59404 states and 212237 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:01,594 INFO L93 Difference]: Finished difference Result 91943 states and 324508 transitions. [2021-06-05 16:01:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:01:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:01,803 INFO L225 Difference]: With dead ends: 91943 [2021-06-05 16:01:01,804 INFO L226 Difference]: Without dead ends: 91842 [2021-06-05 16:01:01,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 2055.7ms TimeCoverageRelationStatistics Valid=351, Invalid=2301, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:01:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91842 states. [2021-06-05 16:01:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91842 to 59362. [2021-06-05 16:01:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59362 states, 59361 states have (on average 3.573221475379458) internal successors, (212110), 59361 states have internal predecessors, (212110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59362 states to 59362 states and 212110 transitions. [2021-06-05 16:01:03,048 INFO L78 Accepts]: Start accepts. Automaton has 59362 states and 212110 transitions. Word has length 37 [2021-06-05 16:01:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:03,048 INFO L482 AbstractCegarLoop]: Abstraction has 59362 states and 212110 transitions. [2021-06-05 16:01:03,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 59362 states and 212110 transitions. [2021-06-05 16:01:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:03,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:03,119 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:03,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 16:01:03,319 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash -73394509, now seen corresponding path program 115 times [2021-06-05 16:01:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:03,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088802468] [2021-06-05 16:01:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:03,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088802468] [2021-06-05 16:01:03,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088802468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15617256] [2021-06-05 16:01:03,671 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 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 [2021-06-05 16:01:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:03,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:01:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:03,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:01:03,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:03,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:01:03,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:03,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:01:03,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:03,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:63 [2021-06-05 16:01:03,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 16:01:03,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 16:01:03,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:03,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2021-06-05 16:01:03,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:03,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:03,934 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:21 [2021-06-05 16:01:04,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:01:04,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:04,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:04,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:04,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:01:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:04,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15617256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:04,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:04,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:01:04,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336380317] [2021-06-05 16:01:04,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:04,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:04,038 INFO L87 Difference]: Start difference. First operand 59362 states and 212110 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:06,087 INFO L93 Difference]: Finished difference Result 91826 states and 324120 transitions. [2021-06-05 16:01:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:01:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:06,292 INFO L225 Difference]: With dead ends: 91826 [2021-06-05 16:01:06,293 INFO L226 Difference]: Without dead ends: 91801 [2021-06-05 16:01:06,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1119.7ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:01:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91801 states. [2021-06-05 16:01:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91801 to 59390. [2021-06-05 16:01:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59390 states, 59389 states have (on average 3.573338497028069) internal successors, (212217), 59389 states have internal predecessors, (212217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59390 states to 59390 states and 212217 transitions. [2021-06-05 16:01:07,595 INFO L78 Accepts]: Start accepts. Automaton has 59390 states and 212217 transitions. Word has length 37 [2021-06-05 16:01:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:07,595 INFO L482 AbstractCegarLoop]: Abstraction has 59390 states and 212217 transitions. [2021-06-05 16:01:07,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 59390 states and 212217 transitions. [2021-06-05 16:01:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:07,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:07,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:07,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable977 [2021-06-05 16:01:07,870 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 550596695, now seen corresponding path program 116 times [2021-06-05 16:01:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:07,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915627658] [2021-06-05 16:01:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:08,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915627658] [2021-06-05 16:01:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915627658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132886490] [2021-06-05 16:01:08,196 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 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 [2021-06-05 16:01:08,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 16:01:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:08,484 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 16:01:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:01:08,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:08,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 16:01:08,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:08,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:01:08,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:08,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:65 [2021-06-05 16:01:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-06-05 16:01:08,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:08,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 16:01:08,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 16:01:08,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:08,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,809 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:74, output treesize:30 [2021-06-05 16:01:08,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:08,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 41 [2021-06-05 16:01:08,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:01:08,873 INFO L628 ElimStorePlain]: treesize reduction 27, result has 44.9 percent of original size [2021-06-05 16:01:08,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:08,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 16:01:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:08,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132886490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:08,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:08,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 16:01:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648533679] [2021-06-05 16:01:08,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:01:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:01:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:01:08,917 INFO L87 Difference]: Start difference. First operand 59390 states and 212217 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:10,988 INFO L93 Difference]: Finished difference Result 91026 states and 321634 transitions. [2021-06-05 16:01:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:01:10,988 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:11,186 INFO L225 Difference]: With dead ends: 91026 [2021-06-05 16:01:11,186 INFO L226 Difference]: Without dead ends: 90939 [2021-06-05 16:01:11,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1189.0ms TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:01:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90939 states. [2021-06-05 16:01:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90939 to 59410. [2021-06-05 16:01:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59410 states, 59409 states have (on average 3.5731454830076252) internal successors, (212277), 59409 states have internal predecessors, (212277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59410 states to 59410 states and 212277 transitions. [2021-06-05 16:01:12,455 INFO L78 Accepts]: Start accepts. Automaton has 59410 states and 212277 transitions. Word has length 37 [2021-06-05 16:01:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:12,456 INFO L482 AbstractCegarLoop]: Abstraction has 59410 states and 212277 transitions. [2021-06-05 16:01:12,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 59410 states and 212277 transitions. [2021-06-05 16:01:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:12,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:12,526 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:12,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:12,726 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash -972893225, now seen corresponding path program 117 times [2021-06-05 16:01:12,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:12,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923801553] [2021-06-05 16:01:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:13,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:13,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923801553] [2021-06-05 16:01:13,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923801553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:13,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102321115] [2021-06-05 16:01:13,046 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 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 [2021-06-05 16:01:13,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:01:13,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:13,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 16:01:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:01:13,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:13,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:13,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 16:01:13,320 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 16:01:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:01:13,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:13,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:13,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:62 [2021-06-05 16:01:13,418 INFO L446 ElimStorePlain]: Different costs {3=[v_C_230], 7=[A, B]} [2021-06-05 16:01:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,431 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-06-05 16:01:13,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 16:01:13,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:13,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,479 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:01:13,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 62 [2021-06-05 16:01:13,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:01:13,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 72 [2021-06-05 16:01:13,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:13,549 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.3 percent of original size [2021-06-05 16:01:13,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:13,551 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:82, output treesize:39 [2021-06-05 16:01:13,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:13,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 65 [2021-06-05 16:01:13,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:01:13,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:13,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:13,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:28 [2021-06-05 16:01:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:13,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102321115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:13,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:13,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 16:01:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277725173] [2021-06-05 16:01:13,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:01:13,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:01:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:01:13,849 INFO L87 Difference]: Start difference. First operand 59410 states and 212277 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:18,132 INFO L93 Difference]: Finished difference Result 91333 states and 322496 transitions. [2021-06-05 16:01:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:01:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:18,342 INFO L225 Difference]: With dead ends: 91333 [2021-06-05 16:01:18,342 INFO L226 Difference]: Without dead ends: 91032 [2021-06-05 16:01:18,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2728.2ms TimeCoverageRelationStatistics Valid=526, Invalid=4304, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:01:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91032 states. [2021-06-05 16:01:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91032 to 59398. [2021-06-05 16:01:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59398 states, 59397 states have (on average 3.573261275822011) internal successors, (212241), 59397 states have internal predecessors, (212241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59398 states to 59398 states and 212241 transitions. [2021-06-05 16:01:19,646 INFO L78 Accepts]: Start accepts. Automaton has 59398 states and 212241 transitions. Word has length 37 [2021-06-05 16:01:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:19,647 INFO L482 AbstractCegarLoop]: Abstraction has 59398 states and 212241 transitions. [2021-06-05 16:01:19,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 59398 states and 212241 transitions. [2021-06-05 16:01:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:19,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:19,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:19,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 16:01:19,921 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1042091125, now seen corresponding path program 118 times [2021-06-05 16:01:19,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:19,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396670654] [2021-06-05 16:01:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:20,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:20,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396670654] [2021-06-05 16:01:20,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396670654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:20,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43407653] [2021-06-05 16:01:20,250 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 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 [2021-06-05 16:01:20,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:20,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:01:20,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:20,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:01:20,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:20,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:01:20,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:01:20,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:20,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:90, output treesize:88 [2021-06-05 16:01:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2021-06-05 16:01:20,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:01:20,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:20,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:20,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-06-05 16:01:20,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:20,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,572 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:108, output treesize:31 [2021-06-05 16:01:20,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:01:20,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:20,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:20,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:01:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:20,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43407653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:20,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:20,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:01:20,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032840142] [2021-06-05 16:01:20,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:20,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:20,624 INFO L87 Difference]: Start difference. First operand 59398 states and 212241 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:21,810 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 16:01:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:22,674 INFO L93 Difference]: Finished difference Result 90381 states and 319683 transitions. [2021-06-05 16:01:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:01:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:22,877 INFO L225 Difference]: With dead ends: 90381 [2021-06-05 16:01:22,877 INFO L226 Difference]: Without dead ends: 90111 [2021-06-05 16:01:22,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1524.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:01:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90111 states. [2021-06-05 16:01:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90111 to 59450. [2021-06-05 16:01:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59450 states, 59449 states have (on average 3.572759844572659) internal successors, (212397), 59449 states have internal predecessors, (212397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59450 states to 59450 states and 212397 transitions. [2021-06-05 16:01:24,167 INFO L78 Accepts]: Start accepts. Automaton has 59450 states and 212397 transitions. Word has length 37 [2021-06-05 16:01:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:24,167 INFO L482 AbstractCegarLoop]: Abstraction has 59450 states and 212397 transitions. [2021-06-05 16:01:24,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 59450 states and 212397 transitions. [2021-06-05 16:01:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:24,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:24,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:24,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-06-05 16:01:24,442 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:24,442 INFO L82 PathProgramCache]: Analyzing trace with hash -73660215, now seen corresponding path program 119 times [2021-06-05 16:01:24,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:24,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796743546] [2021-06-05 16:01:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:24,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796743546] [2021-06-05 16:01:24,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796743546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194384428] [2021-06-05 16:01:24,765 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 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 [2021-06-05 16:01:24,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:01:24,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 16:01:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:24,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:01:24,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:24,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:24,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:24,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-06-05 16:01:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:24,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:01:24,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:24,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:24,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:24,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:84 [2021-06-05 16:01:25,219 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 16:01:25,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:01:25,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:25,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:77 [2021-06-05 16:01:25,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:25,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 68 [2021-06-05 16:01:25,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:25,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:84, output treesize:255 [2021-06-05 16:01:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:01:25,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:25,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 16:01:25,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:25,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:25,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 16:01:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:25,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194384428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:25,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:25,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 16:01:25,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683206160] [2021-06-05 16:01:25,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:01:25,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:25,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:01:25,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:01:25,603 INFO L87 Difference]: Start difference. First operand 59450 states and 212397 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 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) [2021-06-05 16:01:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:28,479 INFO L93 Difference]: Finished difference Result 90871 states and 321272 transitions. [2021-06-05 16:01:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:01:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:28,694 INFO L225 Difference]: With dead ends: 90871 [2021-06-05 16:01:28,695 INFO L226 Difference]: Without dead ends: 90820 [2021-06-05 16:01:28,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1766.6ms TimeCoverageRelationStatistics Valid=366, Invalid=2826, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:01:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90820 states. [2021-06-05 16:01:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90820 to 59474. [2021-06-05 16:01:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59474 states, 59473 states have (on average 3.572461453096363) internal successors, (212465), 59473 states have internal predecessors, (212465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59474 states to 59474 states and 212465 transitions. [2021-06-05 16:01:29,973 INFO L78 Accepts]: Start accepts. Automaton has 59474 states and 212465 transitions. Word has length 37 [2021-06-05 16:01:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:29,974 INFO L482 AbstractCegarLoop]: Abstraction has 59474 states and 212465 transitions. [2021-06-05 16:01:29,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 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) [2021-06-05 16:01:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 59474 states and 212465 transitions. [2021-06-05 16:01:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:30,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:30,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:30,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1008,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:30,247 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1617402717, now seen corresponding path program 120 times [2021-06-05 16:01:30,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:30,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102227012] [2021-06-05 16:01:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:30,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:30,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102227012] [2021-06-05 16:01:30,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102227012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:30,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535548422] [2021-06-05 16:01:30,566 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 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 [2021-06-05 16:01:30,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:01:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 16:01:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:30,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:01:30,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:30,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 16:01:30,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 16:01:30,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:30,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:68 [2021-06-05 16:01:30,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:01:30,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:30,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:78 [2021-06-05 16:01:30,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2021-06-05 16:01:30,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:30,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:47 [2021-06-05 16:01:30,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:01:30,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:30,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:01:30,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:30,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:30,967 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 16:01:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:30,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535548422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:30,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:30,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 16:01:30,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854600413] [2021-06-05 16:01:30,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:01:30,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:30,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:01:30,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:30,988 INFO L87 Difference]: Start difference. First operand 59474 states and 212465 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:33,951 INFO L93 Difference]: Finished difference Result 109611 states and 386668 transitions. [2021-06-05 16:01:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:01:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:34,294 INFO L225 Difference]: With dead ends: 109611 [2021-06-05 16:01:34,294 INFO L226 Difference]: Without dead ends: 109552 [2021-06-05 16:01:34,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1768.8ms TimeCoverageRelationStatistics Valid=450, Invalid=2972, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:01:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109552 states. [2021-06-05 16:01:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109552 to 59468. [2021-06-05 16:01:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59468 states, 59467 states have (on average 3.5725192123362537) internal successors, (212447), 59467 states have internal predecessors, (212447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59468 states to 59468 states and 212447 transitions. [2021-06-05 16:01:35,762 INFO L78 Accepts]: Start accepts. Automaton has 59468 states and 212447 transitions. Word has length 37 [2021-06-05 16:01:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:35,762 INFO L482 AbstractCegarLoop]: Abstraction has 59468 states and 212447 transitions. [2021-06-05 16:01:35,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 59468 states and 212447 transitions. [2021-06-05 16:01:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:35,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:35,837 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:36,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-05 16:01:36,038 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1192455507, now seen corresponding path program 121 times [2021-06-05 16:01:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140931728] [2021-06-05 16:01:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:36,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140931728] [2021-06-05 16:01:36,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140931728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399443510] [2021-06-05 16:01:36,370 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 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 [2021-06-05 16:01:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:36,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:01:36,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:36,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:01:36,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:01:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:36,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:01:36,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:90, output treesize:89 [2021-06-05 16:01:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:01:36,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:74 [2021-06-05 16:01:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2021-06-05 16:01:36,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:01:36,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,696 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:22 [2021-06-05 16:01:36,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:01:36,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:01:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:36,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399443510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:36,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:36,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:01:36,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779770970] [2021-06-05 16:01:36,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:36,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:36,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:36,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:36,741 INFO L87 Difference]: Start difference. First operand 59468 states and 212447 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:38,820 INFO L93 Difference]: Finished difference Result 90713 states and 320694 transitions. [2021-06-05 16:01:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:01:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:39,025 INFO L225 Difference]: With dead ends: 90713 [2021-06-05 16:01:39,025 INFO L226 Difference]: Without dead ends: 90518 [2021-06-05 16:01:39,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1409.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:01:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90518 states. [2021-06-05 16:01:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90518 to 59450. [2021-06-05 16:01:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59450 states, 59449 states have (on average 3.572759844572659) internal successors, (212397), 59449 states have internal predecessors, (212397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59450 states to 59450 states and 212397 transitions. [2021-06-05 16:01:40,307 INFO L78 Accepts]: Start accepts. Automaton has 59450 states and 212397 transitions. Word has length 37 [2021-06-05 16:01:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:40,307 INFO L482 AbstractCegarLoop]: Abstraction has 59450 states and 212397 transitions. [2021-06-05 16:01:40,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59450 states and 212397 transitions. [2021-06-05 16:01:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:40,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:40,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:40,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:40,576 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1466638753, now seen corresponding path program 122 times [2021-06-05 16:01:40,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:40,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228198312] [2021-06-05 16:01:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:40,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:40,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228198312] [2021-06-05 16:01:40,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228198312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:40,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999138050] [2021-06-05 16:01:40,866 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 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 [2021-06-05 16:01:40,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:40,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:40,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 16:01:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:01:40,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:40,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:40,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:40,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 16:01:41,202 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 16:01:41,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:01:41,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:41,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:60 [2021-06-05 16:01:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 16:01:41,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:01:41,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:41,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-06-05 16:01:41,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:41,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,431 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:25 [2021-06-05 16:01:41,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:41,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 16:01:41,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:41,495 INFO L628 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2021-06-05 16:01:41,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:41,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 16:01:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:41,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999138050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:41,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:41,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 16:01:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523358083] [2021-06-05 16:01:41,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:01:41,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:01:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:01:41,535 INFO L87 Difference]: Start difference. First operand 59450 states and 212397 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:43,292 INFO L93 Difference]: Finished difference Result 91880 states and 324131 transitions. [2021-06-05 16:01:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:01:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:43,717 INFO L225 Difference]: With dead ends: 91880 [2021-06-05 16:01:43,717 INFO L226 Difference]: Without dead ends: 91676 [2021-06-05 16:01:43,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1355.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:01:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91676 states. [2021-06-05 16:01:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91676 to 59486. [2021-06-05 16:01:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59486 states, 59485 states have (on average 3.572514079179625) internal successors, (212511), 59485 states have internal predecessors, (212511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59486 states to 59486 states and 212511 transitions. [2021-06-05 16:01:44,969 INFO L78 Accepts]: Start accepts. Automaton has 59486 states and 212511 transitions. Word has length 37 [2021-06-05 16:01:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:44,969 INFO L482 AbstractCegarLoop]: Abstraction has 59486 states and 212511 transitions. [2021-06-05 16:01:44,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 59486 states and 212511 transitions. [2021-06-05 16:01:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:45,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:45,037 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:45,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1019 [2021-06-05 16:01:45,238 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1114345569, now seen corresponding path program 123 times [2021-06-05 16:01:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:45,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085313636] [2021-06-05 16:01:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:45,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:45,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085313636] [2021-06-05 16:01:45,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085313636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:45,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111360071] [2021-06-05 16:01:45,514 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 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 [2021-06-05 16:01:45,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:01:45,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:45,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 16:01:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:45,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:01:45,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:01:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:01:45,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:89 [2021-06-05 16:01:45,910 INFO L446 ElimStorePlain]: Different costs {0=[v_C_248], 3=[A, B]} [2021-06-05 16:01:45,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 16:01:45,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-06-05 16:01:45,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:45,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 16:01:45,958 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:01:45,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:45,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:45,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:82, output treesize:33 [2021-06-05 16:01:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:46,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:46,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-05 16:01:46,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:01:46,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:46,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:46,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-06-05 16:01:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111360071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:46,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:46,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 16:01:46,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145889321] [2021-06-05 16:01:46,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:01:46,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:46,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:01:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:01:46,207 INFO L87 Difference]: Start difference. First operand 59486 states and 212511 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:47,397 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 16:01:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:49,673 INFO L93 Difference]: Finished difference Result 91343 states and 322486 transitions. [2021-06-05 16:01:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:01:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:49,875 INFO L225 Difference]: With dead ends: 91343 [2021-06-05 16:01:49,875 INFO L226 Difference]: Without dead ends: 90986 [2021-06-05 16:01:49,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2228.3ms TimeCoverageRelationStatistics Valid=335, Invalid=3205, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:01:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90986 states. [2021-06-05 16:01:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90986 to 59495. [2021-06-05 16:01:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59495 states, 59494 states have (on average 3.572427471677816) internal successors, (212538), 59494 states have internal predecessors, (212538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59495 states to 59495 states and 212538 transitions. [2021-06-05 16:01:51,311 INFO L78 Accepts]: Start accepts. Automaton has 59495 states and 212538 transitions. Word has length 37 [2021-06-05 16:01:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:51,311 INFO L482 AbstractCegarLoop]: Abstraction has 59495 states and 212538 transitions. [2021-06-05 16:01:51,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 59495 states and 212538 transitions. [2021-06-05 16:01:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:51,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:51,384 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:51,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-06-05 16:01:51,584 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1442450103, now seen corresponding path program 124 times [2021-06-05 16:01:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:51,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506290004] [2021-06-05 16:01:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:51,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:51,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506290004] [2021-06-05 16:01:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506290004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:51,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541034441] [2021-06-05 16:01:51,862 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 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 [2021-06-05 16:01:51,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:51,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:01:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:51,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:01:51,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:51,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:51,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:51,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:01:52,058 INFO L354 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2021-06-05 16:01:52,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 120 [2021-06-05 16:01:52,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:160, output treesize:87 [2021-06-05 16:01:52,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:52,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:52,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:52,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 59 [2021-06-05 16:01:52,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:92 [2021-06-05 16:01:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:52,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-06-05 16:01:52,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:68 [2021-06-05 16:01:52,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:01:52,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:01:52,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 16:01:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:52,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541034441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:52,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:52,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:01:52,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797940456] [2021-06-05 16:01:52,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:01:52,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:52,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:01:52,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:52,297 INFO L87 Difference]: Start difference. First operand 59495 states and 212538 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:01:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:54,488 INFO L93 Difference]: Finished difference Result 90932 states and 321563 transitions. [2021-06-05 16:01:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:01:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:01:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:54,694 INFO L225 Difference]: With dead ends: 90932 [2021-06-05 16:01:54,694 INFO L226 Difference]: Without dead ends: 90865 [2021-06-05 16:01:54,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1238.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:01:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90865 states. [2021-06-05 16:01:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90865 to 59573. [2021-06-05 16:01:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59573 states, 59572 states have (on average 3.5715436782380983) internal successors, (212764), 59572 states have internal predecessors, (212764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59573 states to 59573 states and 212764 transitions. [2021-06-05 16:01:55,951 INFO L78 Accepts]: Start accepts. Automaton has 59573 states and 212764 transitions. Word has length 37 [2021-06-05 16:01:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:55,951 INFO L482 AbstractCegarLoop]: Abstraction has 59573 states and 212764 transitions. [2021-06-05 16:01:55,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:01:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 59573 states and 212764 transitions. [2021-06-05 16:01:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:01:56,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:56,031 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:56,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1036 [2021-06-05 16:01:56,232 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1733721901, now seen corresponding path program 125 times [2021-06-05 16:01:56,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:56,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782659506] [2021-06-05 16:01:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:56,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:56,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782659506] [2021-06-05 16:01:56,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782659506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:56,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193648625] [2021-06-05 16:01:56,506 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 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 [2021-06-05 16:01:56,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:01:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:56,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 16:01:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:56,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:01:56,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:56,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:56,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:56,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 16:01:56,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:56,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:01:56,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 16:01:56,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:56,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:56,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:56,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-06-05 16:01:56,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:56,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:56,880 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:01:56,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 50 [2021-06-05 16:01:56,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:56,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:56,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:56,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-06-05 16:01:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 16:01:57,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:57,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:57,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 16:01:57,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:57,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:57,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:57,028 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:80, output treesize:37 [2021-06-05 16:01:57,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:57,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 83 [2021-06-05 16:01:57,392 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2021-06-05 16:01:57,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 16:01:57,455 INFO L628 ElimStorePlain]: treesize reduction 381, result has 6.6 percent of original size [2021-06-05 16:01:57,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:57,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:21 [2021-06-05 16:01:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193648625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:57,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:57,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 16:01:57,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099355037] [2021-06-05 16:01:57,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:01:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:01:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:01:57,505 INFO L87 Difference]: Start difference. First operand 59573 states and 212764 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:00,046 INFO L93 Difference]: Finished difference Result 91225 states and 322177 transitions. [2021-06-05 16:02:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:02:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:02:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:00,244 INFO L225 Difference]: With dead ends: 91225 [2021-06-05 16:02:00,244 INFO L226 Difference]: Without dead ends: 91033 [2021-06-05 16:02:00,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1702.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2506, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:02:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91033 states. [2021-06-05 16:02:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91033 to 59555. [2021-06-05 16:02:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59555 states, 59554 states have (on average 3.5717164254290226) internal successors, (212710), 59554 states have internal predecessors, (212710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59555 states to 59555 states and 212710 transitions. [2021-06-05 16:02:01,499 INFO L78 Accepts]: Start accepts. Automaton has 59555 states and 212710 transitions. Word has length 37 [2021-06-05 16:02:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:01,499 INFO L482 AbstractCegarLoop]: Abstraction has 59555 states and 212710 transitions. [2021-06-05 16:02:01,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 59555 states and 212710 transitions. [2021-06-05 16:02:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:02:01,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:01,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:01,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-05 16:02:01,781 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -215989977, now seen corresponding path program 126 times [2021-06-05 16:02:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:01,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249613605] [2021-06-05 16:02:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:02,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:02,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249613605] [2021-06-05 16:02:02,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249613605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:02,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897114372] [2021-06-05 16:02:02,077 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 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 [2021-06-05 16:02:02,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:02:02,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 16:02:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:02,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:02:02,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:02:02,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:02,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:02:02,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:55 [2021-06-05 16:02:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 16:02:02,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:02,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:69 [2021-06-05 16:02:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 56 [2021-06-05 16:02:02,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-06-05 16:02:02,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:02:02,536 INFO L628 ElimStorePlain]: treesize reduction 60, result has 66.7 percent of original size [2021-06-05 16:02:02,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:02,560 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:80, output treesize:95 [2021-06-05 16:02:02,747 INFO L446 ElimStorePlain]: Different costs {0=[C, v_prenex_25, v_prenex_24, v_prenex_26], 3=[v_prenex_27]} [2021-06-05 16:02:02,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:02:02,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,784 INFO L628 ElimStorePlain]: treesize reduction 79, result has 41.0 percent of original size [2021-06-05 16:02:02,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-06-05 16:02:02,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-06-05 16:02:02,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-05 16:02:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:02,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:02,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:02:02,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:02,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:02,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:02:02,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:159, output treesize:31 [2021-06-05 16:02:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:02,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897114372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:02,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:02,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 16:02:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504821834] [2021-06-05 16:02:02,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:02:02,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:02,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:02:02,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:02:02,890 INFO L87 Difference]: Start difference. First operand 59555 states and 212710 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:05,808 INFO L93 Difference]: Finished difference Result 91349 states and 322707 transitions. [2021-06-05 16:02:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:02:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:02:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:06,192 INFO L225 Difference]: With dead ends: 91349 [2021-06-05 16:02:06,193 INFO L226 Difference]: Without dead ends: 91216 [2021-06-05 16:02:06,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1760.1ms TimeCoverageRelationStatistics Valid=316, Invalid=2546, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:02:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91216 states. [2021-06-05 16:02:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91216 to 59537. [2021-06-05 16:02:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59537 states, 59536 states have (on average 3.571956463316313) internal successors, (212660), 59536 states have internal predecessors, (212660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59537 states to 59537 states and 212660 transitions. [2021-06-05 16:02:07,428 INFO L78 Accepts]: Start accepts. Automaton has 59537 states and 212660 transitions. Word has length 37 [2021-06-05 16:02:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:07,428 INFO L482 AbstractCegarLoop]: Abstraction has 59537 states and 212660 transitions. [2021-06-05 16:02:07,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 59537 states and 212660 transitions. [2021-06-05 16:02:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:02:07,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:07,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:07,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-06-05 16:02:07,702 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 129814897, now seen corresponding path program 127 times [2021-06-05 16:02:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:07,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628823955] [2021-06-05 16:02:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:07,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:07,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628823955] [2021-06-05 16:02:08,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628823955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:08,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686936751] [2021-06-05 16:02:08,000 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 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 [2021-06-05 16:02:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:02:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:08,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:02:08,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:08,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:02:08,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:08,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-06-05 16:02:08,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:08,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:61 [2021-06-05 16:02:08,271 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 3=[v_C_260]} [2021-06-05 16:02:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2021-06-05 16:02:08,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:08,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-06-05 16:02:08,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:08,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:08,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-06-05 16:02:08,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:08,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,294 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:24 [2021-06-05 16:02:08,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:02:08,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:08,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:08,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-06-05 16:02:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:08,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686936751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:08,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:08,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 16:02:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026473905] [2021-06-05 16:02:08,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:08,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:08,340 INFO L87 Difference]: Start difference. First operand 59537 states and 212660 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:10,242 INFO L93 Difference]: Finished difference Result 81316 states and 285431 transitions. [2021-06-05 16:02:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:02:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:02:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:10,416 INFO L225 Difference]: With dead ends: 81316 [2021-06-05 16:02:10,416 INFO L226 Difference]: Without dead ends: 81187 [2021-06-05 16:02:10,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1096.2ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:02:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81187 states. [2021-06-05 16:02:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81187 to 59649. [2021-06-05 16:02:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59649 states, 59648 states have (on average 3.5713184012875536) internal successors, (213022), 59648 states have internal predecessors, (213022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59649 states to 59649 states and 213022 transitions. [2021-06-05 16:02:11,615 INFO L78 Accepts]: Start accepts. Automaton has 59649 states and 213022 transitions. Word has length 37 [2021-06-05 16:02:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:11,615 INFO L482 AbstractCegarLoop]: Abstraction has 59649 states and 213022 transitions. [2021-06-05 16:02:11,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 59649 states and 213022 transitions. [2021-06-05 16:02:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:02:11,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:11,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:11,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1100,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:11,895 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash -985936443, now seen corresponding path program 128 times [2021-06-05 16:02:11,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:11,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162380722] [2021-06-05 16:02:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:12,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:12,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162380722] [2021-06-05 16:02:12,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162380722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:12,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361337975] [2021-06-05 16:02:12,196 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 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 [2021-06-05 16:02:12,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:02:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:12,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:02:12,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:02:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 16:02:12,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-06-05 16:02:12,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:02:12,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:74 [2021-06-05 16:02:12,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:02:12,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:43 [2021-06-05 16:02:12,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:02:12,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 16:02:12,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 16:02:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:12,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361337975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:12,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:12,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 16:02:12,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884720197] [2021-06-05 16:02:12,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:12,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:12,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:12,549 INFO L87 Difference]: Start difference. First operand 59649 states and 213022 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:13,150 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-05 16:02:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:14,964 INFO L93 Difference]: Finished difference Result 78184 states and 274597 transitions. [2021-06-05 16:02:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:02:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:02:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:15,131 INFO L225 Difference]: With dead ends: 78184 [2021-06-05 16:02:15,131 INFO L226 Difference]: Without dead ends: 78058 [2021-06-05 16:02:15,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1750.7ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:02:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78058 states. [2021-06-05 16:02:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78058 to 59871. [2021-06-05 16:02:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59871 states, 59870 states have (on average 3.5704693502588944) internal successors, (213764), 59870 states have internal predecessors, (213764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59871 states to 59871 states and 213764 transitions. [2021-06-05 16:02:16,306 INFO L78 Accepts]: Start accepts. Automaton has 59871 states and 213764 transitions. Word has length 37 [2021-06-05 16:02:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:16,306 INFO L482 AbstractCegarLoop]: Abstraction has 59871 states and 213764 transitions. [2021-06-05 16:02:16,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59871 states and 213764 transitions. [2021-06-05 16:02:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:02:16,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:16,625 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:16,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 16:02:16,841 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2104731735, now seen corresponding path program 129 times [2021-06-05 16:02:16,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:16,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119703817] [2021-06-05 16:02:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:17,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:17,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119703817] [2021-06-05 16:02:17,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119703817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:17,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044458103] [2021-06-05 16:02:17,156 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 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 [2021-06-05 16:02:17,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:02:17,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 16:02:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:02:17,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 16:02:17,286 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 16:02:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:02:17,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 16:02:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,488 INFO L354 Elim1Store]: treesize reduction 62, result has 23.5 percent of original size [2021-06-05 16:02:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2021-06-05 16:02:17,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:17,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:95 [2021-06-05 16:02:17,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 78 [2021-06-05 16:02:17,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 61 [2021-06-05 16:02:17,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:02:17,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:17,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:53 [2021-06-05 16:02:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:02:17,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:17,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 16:02:17,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:02:17,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:26 [2021-06-05 16:02:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044458103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:17,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:17,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 16:02:17,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970990334] [2021-06-05 16:02:17,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:02:17,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:02:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:02:17,898 INFO L87 Difference]: Start difference. First operand 59871 states and 213764 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,565 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-06-05 16:02:23,160 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2021-06-05 16:02:23,661 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 16:02:25,817 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-05 16:02:26,201 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-05 16:02:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:27,268 INFO L93 Difference]: Finished difference Result 96824 states and 336670 transitions. [2021-06-05 16:02:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 16:02:27,269 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:02:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:27,467 INFO L225 Difference]: With dead ends: 96824 [2021-06-05 16:02:27,468 INFO L226 Difference]: Without dead ends: 96688 [2021-06-05 16:02:27,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 5893.3ms TimeCoverageRelationStatistics Valid=838, Invalid=5968, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:02:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96688 states. [2021-06-05 16:02:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96688 to 60651. [2021-06-05 16:02:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60651 states, 60650 states have (on average 3.5689530090684256) internal successors, (216457), 60650 states have internal predecessors, (216457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60651 states to 60651 states and 216457 transitions. [2021-06-05 16:02:28,757 INFO L78 Accepts]: Start accepts. Automaton has 60651 states and 216457 transitions. Word has length 37 [2021-06-05 16:02:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:28,757 INFO L482 AbstractCegarLoop]: Abstraction has 60651 states and 216457 transitions. [2021-06-05 16:02:28,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 60651 states and 216457 transitions. [2021-06-05 16:02:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:02:28,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:28,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:29,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 16:02:29,041 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash 811696453, now seen corresponding path program 130 times [2021-06-05 16:02:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:29,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323619470] [2021-06-05 16:02:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:29,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:29,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323619470] [2021-06-05 16:02:29,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323619470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:29,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451406561] [2021-06-05 16:02:29,326 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 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 [2021-06-05 16:02:29,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:29,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:29,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:02:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:02:29,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:29,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:02:29,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:02:29,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:29,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 16:02:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:02:29,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:29,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:60 [2021-06-05 16:02:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 16:02:29,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:29,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:35 [2021-06-05 16:02:29,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:02:29,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:29,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 16:02:29,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:29,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:29,655 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 16:02:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:29,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451406561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:29,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:29,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 16:02:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895701321] [2021-06-05 16:02:29,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:29,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:29,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:29,675 INFO L87 Difference]: Start difference. First operand 60651 states and 216457 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:30,650 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-05 16:02:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:32,106 INFO L93 Difference]: Finished difference Result 81723 states and 286101 transitions. [2021-06-05 16:02:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:02:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:02:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:32,283 INFO L225 Difference]: With dead ends: 81723 [2021-06-05 16:02:32,283 INFO L226 Difference]: Without dead ends: 81695 [2021-06-05 16:02:32,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1550.6ms TimeCoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:02:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81695 states. [2021-06-05 16:02:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81695 to 60878. [2021-06-05 16:02:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60878 states, 60877 states have (on average 3.5689340801944907) internal successors, (217266), 60877 states have internal predecessors, (217266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60878 states to 60878 states and 217266 transitions. [2021-06-05 16:02:33,504 INFO L78 Accepts]: Start accepts. Automaton has 60878 states and 217266 transitions. Word has length 37 [2021-06-05 16:02:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:33,504 INFO L482 AbstractCegarLoop]: Abstraction has 60878 states and 217266 transitions. [2021-06-05 16:02:33,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 60878 states and 217266 transitions. [2021-06-05 16:02:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:02:33,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:33,586 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:33,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-05 16:02:33,787 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash -608755159, now seen corresponding path program 131 times [2021-06-05 16:02:33,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:33,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951658759] [2021-06-05 16:02:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:34,132 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-06-05 16:02:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:34,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951658759] [2021-06-05 16:02:34,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951658759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838286347] [2021-06-05 16:02:34,328 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 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 [2021-06-05 16:02:34,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:02:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 16:02:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:34,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:02:34,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:34,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:34,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:34,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 16:02:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,487 INFO L354 Elim1Store]: treesize reduction 33, result has 28.3 percent of original size [2021-06-05 16:02:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 52 [2021-06-05 16:02:34,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:34,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:34,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:34,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:79 [2021-06-05 16:02:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:34,711 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:02:34,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 16:02:34,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:34,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:34,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:34,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:100 [2021-06-05 16:02:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:43,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 63 treesize of output 123 [2021-06-05 16:02:43,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:02:43,429 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 72 [2021-06-05 16:02:43,429 INFO L628 ElimStorePlain]: treesize reduction 1036, result has 17.5 percent of original size [2021-06-05 16:02:43,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:43,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:279 [2021-06-05 16:02:43,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:02:43,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:43,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:43,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 16:02:43,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:43,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:43,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:43,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 16:02:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:43,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838286347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:43,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:43,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 16:02:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13659714] [2021-06-05 16:02:43,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:02:43,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:02:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=625, Unknown=4, NotChecked=0, Total=702 [2021-06-05 16:02:43,597 INFO L87 Difference]: Start difference. First operand 60878 states and 217266 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:56,095 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 16:02:58,359 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 16:03:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:16,491 INFO L93 Difference]: Finished difference Result 79984 states and 280655 transitions. [2021-06-05 16:03:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:03:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:03:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:16,670 INFO L225 Difference]: With dead ends: 79984 [2021-06-05 16:03:16,670 INFO L226 Difference]: Without dead ends: 79899 [2021-06-05 16:03:16,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 15452.3ms TimeCoverageRelationStatistics Valid=459, Invalid=3569, Unknown=4, NotChecked=0, Total=4032 [2021-06-05 16:03:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79899 states. [2021-06-05 16:03:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79899 to 60908. [2021-06-05 16:03:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60908 states, 60907 states have (on average 3.5688508710000493) internal successors, (217368), 60907 states have internal predecessors, (217368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60908 states to 60908 states and 217368 transitions. [2021-06-05 16:03:18,008 INFO L78 Accepts]: Start accepts. Automaton has 60908 states and 217368 transitions. Word has length 37 [2021-06-05 16:03:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:18,008 INFO L482 AbstractCegarLoop]: Abstraction has 60908 states and 217368 transitions. [2021-06-05 16:03:18,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 60908 states and 217368 transitions. [2021-06-05 16:03:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:03:18,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:18,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:18,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:18,298 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1628573203, now seen corresponding path program 132 times [2021-06-05 16:03:18,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:18,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759430720] [2021-06-05 16:03:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:18,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:18,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759430720] [2021-06-05 16:03:18,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759430720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:18,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427791640] [2021-06-05 16:03:18,730 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 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 [2021-06-05 16:03:18,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:03:18,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 16:03:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:18,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:03:18,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:18,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:18,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:18,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:03:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:03:18,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:18,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:18,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:18,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:57 [2021-06-05 16:03:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:19,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:19,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 52 [2021-06-05 16:03:19,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:19,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:71 [2021-06-05 16:03:19,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:19,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 72 [2021-06-05 16:03:19,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:19,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:19,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 86 [2021-06-05 16:03:19,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:03:19,436 INFO L628 ElimStorePlain]: treesize reduction 184, result has 39.5 percent of original size [2021-06-05 16:03:19,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:90, output treesize:234 [2021-06-05 16:03:19,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-06-05 16:03:19,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:03:19,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:03:19,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:03:19,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:03:19,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:19,614 INFO L628 ElimStorePlain]: treesize reduction 13, result has 75.5 percent of original size [2021-06-05 16:03:19,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:03:19,615 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:150, output treesize:40 [2021-06-05 16:03:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:19,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427791640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:19,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:19,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 16:03:19,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471066244] [2021-06-05 16:03:19,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:03:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:03:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:03:19,740 INFO L87 Difference]: Start difference. First operand 60908 states and 217368 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:25,616 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 16:03:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:26,136 INFO L93 Difference]: Finished difference Result 98086 states and 340909 transitions. [2021-06-05 16:03:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:03:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:03:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:26,350 INFO L225 Difference]: With dead ends: 98086 [2021-06-05 16:03:26,350 INFO L226 Difference]: Without dead ends: 98008 [2021-06-05 16:03:26,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 3896.8ms TimeCoverageRelationStatistics Valid=717, Invalid=5135, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:03:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98008 states. [2021-06-05 16:03:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98008 to 60920. [2021-06-05 16:03:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60920 states, 60919 states have (on average 3.5690342914361692) internal successors, (217422), 60919 states have internal predecessors, (217422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60920 states to 60920 states and 217422 transitions. [2021-06-05 16:03:27,641 INFO L78 Accepts]: Start accepts. Automaton has 60920 states and 217422 transitions. Word has length 37 [2021-06-05 16:03:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:27,642 INFO L482 AbstractCegarLoop]: Abstraction has 60920 states and 217422 transitions. [2021-06-05 16:03:27,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60920 states and 217422 transitions. [2021-06-05 16:03:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:03:27,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:27,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:27,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1147 [2021-06-05 16:03:27,924 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1966119509, now seen corresponding path program 133 times [2021-06-05 16:03:27,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:27,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649042690] [2021-06-05 16:03:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:28,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:28,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649042690] [2021-06-05 16:03:28,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649042690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:28,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517029649] [2021-06-05 16:03:28,303 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 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 [2021-06-05 16:03:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:03:28,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:28,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:03:28,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:28,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 16:03:28,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:28,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:03:28,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:28,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:67 [2021-06-05 16:03:28,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 50 [2021-06-05 16:03:28,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:28,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:69 [2021-06-05 16:03:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2021-06-05 16:03:28,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:03:28,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:28,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:22 [2021-06-05 16:03:28,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:03:28,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:28,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:28,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-06-05 16:03:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:28,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517029649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:28,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:28,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 16:03:28,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771212515] [2021-06-05 16:03:28,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:28,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:03:28,795 INFO L87 Difference]: Start difference. First operand 60920 states and 217422 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:29,744 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 16:03:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:32,310 INFO L93 Difference]: Finished difference Result 84621 states and 296318 transitions. [2021-06-05 16:03:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:03:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:03:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:32,487 INFO L225 Difference]: With dead ends: 84621 [2021-06-05 16:03:32,487 INFO L226 Difference]: Without dead ends: 84478 [2021-06-05 16:03:32,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1914.6ms TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:03:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84478 states. [2021-06-05 16:03:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84478 to 61333. [2021-06-05 16:03:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61333 states, 61332 states have (on average 3.5672242874845104) internal successors, (218785), 61332 states have internal predecessors, (218785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61333 states to 61333 states and 218785 transitions. [2021-06-05 16:03:33,739 INFO L78 Accepts]: Start accepts. Automaton has 61333 states and 218785 transitions. Word has length 37 [2021-06-05 16:03:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:33,740 INFO L482 AbstractCegarLoop]: Abstraction has 61333 states and 218785 transitions. [2021-06-05 16:03:33,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 61333 states and 218785 transitions. [2021-06-05 16:03:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:03:34,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:34,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:34,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:34,313 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:34,314 INFO L82 PathProgramCache]: Analyzing trace with hash 937086363, now seen corresponding path program 134 times [2021-06-05 16:03:34,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:34,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224837236] [2021-06-05 16:03:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:34,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:34,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224837236] [2021-06-05 16:03:34,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224837236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:34,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90834822] [2021-06-05 16:03:34,755 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 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 [2021-06-05 16:03:34,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:03:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:03:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:03:34,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:34,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:34,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:34,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:03:34,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 16:03:34,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:34,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:34,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:34,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-06-05 16:03:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:03:35,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:35,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:70 [2021-06-05 16:03:35,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2021-06-05 16:03:35,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:03:35,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:35,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,154 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:22 [2021-06-05 16:03:35,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:03:35,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:35,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:35,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-06-05 16:03:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:35,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90834822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:35,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:35,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 16:03:35,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405306336] [2021-06-05 16:03:35,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:35,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:35,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:03:35,213 INFO L87 Difference]: Start difference. First operand 61333 states and 218785 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:38,838 INFO L93 Difference]: Finished difference Result 86915 states and 303385 transitions. [2021-06-05 16:03:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:03:38,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:03:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:39,023 INFO L225 Difference]: With dead ends: 86915 [2021-06-05 16:03:39,024 INFO L226 Difference]: Without dead ends: 86776 [2021-06-05 16:03:39,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2057.1ms TimeCoverageRelationStatistics Valid=362, Invalid=2290, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:03:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86776 states. [2021-06-05 16:03:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86776 to 61689. [2021-06-05 16:03:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61689 states, 61688 states have (on average 3.5661717027622877) internal successors, (219990), 61688 states have internal predecessors, (219990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61689 states to 61689 states and 219990 transitions. [2021-06-05 16:03:40,249 INFO L78 Accepts]: Start accepts. Automaton has 61689 states and 219990 transitions. Word has length 37 [2021-06-05 16:03:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:40,249 INFO L482 AbstractCegarLoop]: Abstraction has 61689 states and 219990 transitions. [2021-06-05 16:03:40,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 61689 states and 219990 transitions. [2021-06-05 16:03:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:03:40,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:40,331 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:40,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:40,531 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1282944805, now seen corresponding path program 135 times [2021-06-05 16:03:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:40,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958692690] [2021-06-05 16:03:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:40,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:40,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958692690] [2021-06-05 16:03:40,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958692690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:40,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062779931] [2021-06-05 16:03:40,951 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 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 [2021-06-05 16:03:40,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:03:40,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 16:03:40,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:03:41,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:41,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:41,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-06-05 16:03:41,148 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-06-05 16:03:41,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:03:41,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:41,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:41,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:71 [2021-06-05 16:03:41,557 INFO L446 ElimStorePlain]: Different costs {6=[v_C_284], 7=[A, B]} [2021-06-05 16:03:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,602 INFO L354 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2021-06-05 16:03:41,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 74 [2021-06-05 16:03:41,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:41,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,696 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:03:41,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 64 [2021-06-05 16:03:41,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:03:41,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:41,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 74 [2021-06-05 16:03:41,767 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:03:41,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:41,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:41,793 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:90, output treesize:65 [2021-06-05 16:03:42,218 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 16:03:42,518 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_28], 10=[C]} [2021-06-05 16:03:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:42,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:42,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 16:03:42,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:42,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:42,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:42,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:42,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:42,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:42,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:42,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 16:03:42,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:42,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:42,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:03:42,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:80, output treesize:28 [2021-06-05 16:03:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:42,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062779931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:42,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:42,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 16:03:42,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920458989] [2021-06-05 16:03:42,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:03:42,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:03:42,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:03:42,659 INFO L87 Difference]: Start difference. First operand 61689 states and 219990 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:45,751 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-06-05 16:03:45,953 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 16:03:47,195 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 16:03:47,496 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 16:03:50,494 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 16:03:51,942 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 16:03:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:52,719 INFO L93 Difference]: Finished difference Result 106139 states and 371321 transitions. [2021-06-05 16:03:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 16:03:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:03:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:52,963 INFO L225 Difference]: With dead ends: 106139 [2021-06-05 16:03:52,963 INFO L226 Difference]: Without dead ends: 105889 [2021-06-05 16:03:52,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 6408.6ms TimeCoverageRelationStatistics Valid=975, Invalid=8145, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 16:03:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105889 states. [2021-06-05 16:03:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105889 to 61703. [2021-06-05 16:03:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61703 states, 61702 states have (on average 3.566043240089462) internal successors, (220032), 61702 states have internal predecessors, (220032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61703 states to 61703 states and 220032 transitions. [2021-06-05 16:03:54,281 INFO L78 Accepts]: Start accepts. Automaton has 61703 states and 220032 transitions. Word has length 37 [2021-06-05 16:03:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:54,281 INFO L482 AbstractCegarLoop]: Abstraction has 61703 states and 220032 transitions. [2021-06-05 16:03:54,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 61703 states and 220032 transitions. [2021-06-05 16:03:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:03:54,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:54,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:54,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:54,565 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1896271151, now seen corresponding path program 136 times [2021-06-05 16:03:54,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:54,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202422784] [2021-06-05 16:03:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:54,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:54,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202422784] [2021-06-05 16:03:54,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202422784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:54,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246947478] [2021-06-05 16:03:54,980 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 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 [2021-06-05 16:03:55,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:03:55,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:55,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:03:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:55,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:03:55,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:55,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:03:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:03:55,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:55,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:72 [2021-06-05 16:03:55,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 69 [2021-06-05 16:03:55,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:55,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:106, output treesize:105 [2021-06-05 16:03:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2021-06-05 16:03:55,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:55,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:68 [2021-06-05 16:03:55,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:03:55,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:55,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 16:03:55,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:55,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:55,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 16:03:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:55,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246947478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:55,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:55,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:03:55,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126034100] [2021-06-05 16:03:55,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:03:55,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:03:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:03:55,527 INFO L87 Difference]: Start difference. First operand 61703 states and 220032 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:03:56,487 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 16:04:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:00,187 INFO L93 Difference]: Finished difference Result 102518 states and 359068 transitions. [2021-06-05 16:04:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:04:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:04:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:00,428 INFO L225 Difference]: With dead ends: 102518 [2021-06-05 16:04:00,428 INFO L226 Difference]: Without dead ends: 102457 [2021-06-05 16:04:00,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 3308.0ms TimeCoverageRelationStatistics Valid=705, Invalid=3987, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:04:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102457 states. [2021-06-05 16:04:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102457 to 61740. [2021-06-05 16:04:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61740 states, 61739 states have (on average 3.5659469703105007) internal successors, (220158), 61739 states have internal predecessors, (220158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61740 states to 61740 states and 220158 transitions. [2021-06-05 16:04:01,742 INFO L78 Accepts]: Start accepts. Automaton has 61740 states and 220158 transitions. Word has length 37 [2021-06-05 16:04:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:01,742 INFO L482 AbstractCegarLoop]: Abstraction has 61740 states and 220158 transitions. [2021-06-05 16:04:01,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:04:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 61740 states and 220158 transitions. [2021-06-05 16:04:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:04:01,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:01,825 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:02,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:02,025 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash 777475859, now seen corresponding path program 137 times [2021-06-05 16:04:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:02,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421231362] [2021-06-05 16:04:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421231362] [2021-06-05 16:04:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421231362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042352610] [2021-06-05 16:04:02,468 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 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 [2021-06-05 16:04:02,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:04:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:04:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:02,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:04:02,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:02,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:02,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 16:04:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:02,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:04:02,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-06-05 16:04:02,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:02,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:02,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:76 [2021-06-05 16:04:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,062 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-06-05 16:04:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 70 [2021-06-05 16:04:03,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:03,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:03,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:115, output treesize:114 [2021-06-05 16:04:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2021-06-05 16:04:03,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:04:03,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 16:04:03,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:04:03,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:03,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:86, output treesize:48 [2021-06-05 16:04:03,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-06-05 16:04:03,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:03,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:03,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 87 [2021-06-05 16:04:03,798 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 83 [2021-06-05 16:04:03,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:04,449 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 44 [2021-06-05 16:04:04,449 INFO L628 ElimStorePlain]: treesize reduction 1209, result has 7.7 percent of original size [2021-06-05 16:04:04,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:04:04,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:86, output treesize:85 [2021-06-05 16:04:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:04,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042352610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:04,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:04,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 16:04:04,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064048630] [2021-06-05 16:04:04,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:04:04,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:04,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:04:04,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:04:04,571 INFO L87 Difference]: Start difference. First operand 61740 states and 220158 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:10,339 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 16:04:11,816 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-06-05 16:04:12,346 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 16:04:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:14,594 INFO L93 Difference]: Finished difference Result 106111 states and 370803 transitions. [2021-06-05 16:04:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 16:04:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:04:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:14,848 INFO L225 Difference]: With dead ends: 106111 [2021-06-05 16:04:14,849 INFO L226 Difference]: Without dead ends: 105838 [2021-06-05 16:04:14,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 6894.0ms TimeCoverageRelationStatistics Valid=1159, Invalid=8542, Unknown=1, NotChecked=0, Total=9702 [2021-06-05 16:04:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105838 states. [2021-06-05 16:04:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105838 to 61748. [2021-06-05 16:04:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61748 states, 61747 states have (on average 3.565533548188576) internal successors, (220161), 61747 states have internal predecessors, (220161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61748 states to 61748 states and 220161 transitions. [2021-06-05 16:04:16,192 INFO L78 Accepts]: Start accepts. Automaton has 61748 states and 220161 transitions. Word has length 37 [2021-06-05 16:04:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:16,192 INFO L482 AbstractCegarLoop]: Abstraction has 61748 states and 220161 transitions. [2021-06-05 16:04:16,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 61748 states and 220161 transitions. [2021-06-05 16:04:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:04:16,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:16,277 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:16,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1185,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:16,478 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1643563855, now seen corresponding path program 138 times [2021-06-05 16:04:16,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:16,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195653595] [2021-06-05 16:04:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:16,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195653595] [2021-06-05 16:04:16,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195653595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:16,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322511889] [2021-06-05 16:04:16,931 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 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 [2021-06-05 16:04:16,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:04:16,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 16:04:16,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:17,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:04:17,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 16:04:17,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:04:17,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:04:17,786 INFO L446 ElimStorePlain]: Different costs {0=[v_C_293], 7=[A, B]} [2021-06-05 16:04:17,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 16:04:17,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 74 [2021-06-05 16:04:17,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:17,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 51 [2021-06-05 16:04:17,905 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:04:17,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:17,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:17,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:35 [2021-06-05 16:04:18,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:18,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 41 [2021-06-05 16:04:18,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:18,130 INFO L628 ElimStorePlain]: treesize reduction 39, result has 39.1 percent of original size [2021-06-05 16:04:18,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:18,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:24 [2021-06-05 16:04:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322511889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:18,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:18,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 16:04:18,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462303376] [2021-06-05 16:04:18,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:04:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:04:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:04:18,198 INFO L87 Difference]: Start difference. First operand 61748 states and 220161 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:24,046 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-06-05 16:04:24,255 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-06-05 16:04:24,615 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2021-06-05 16:04:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:25,651 INFO L93 Difference]: Finished difference Result 99879 states and 349932 transitions. [2021-06-05 16:04:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:04:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:04:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:25,887 INFO L225 Difference]: With dead ends: 99879 [2021-06-05 16:04:25,887 INFO L226 Difference]: Without dead ends: 99624 [2021-06-05 16:04:25,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 5692.8ms TimeCoverageRelationStatistics Valid=868, Invalid=6104, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:04:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99624 states. [2021-06-05 16:04:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99624 to 61754. [2021-06-05 16:04:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61754 states, 61753 states have (on average 3.5654786002299486) internal successors, (220179), 61753 states have internal predecessors, (220179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61754 states to 61754 states and 220179 transitions. [2021-06-05 16:04:27,402 INFO L78 Accepts]: Start accepts. Automaton has 61754 states and 220179 transitions. Word has length 37 [2021-06-05 16:04:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:27,402 INFO L482 AbstractCegarLoop]: Abstraction has 61754 states and 220179 transitions. [2021-06-05 16:04:27,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 61754 states and 220179 transitions. [2021-06-05 16:04:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:04:27,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:27,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:27,688 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash 142673563, now seen corresponding path program 139 times [2021-06-05 16:04:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:27,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726137738] [2021-06-05 16:04:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:28,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726137738] [2021-06-05 16:04:28,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726137738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161994458] [2021-06-05 16:04:28,102 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 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 [2021-06-05 16:04:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:04:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:28,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:04:28,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 16:04:28,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:28,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 16:04:28,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:53 [2021-06-05 16:04:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 16:04:28,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:04:28,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-06-05 16:04:28,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,500 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:72, output treesize:22 [2021-06-05 16:04:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 16:04:28,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:28,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:28,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:04:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161994458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:28,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:28,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:04:28,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801432334] [2021-06-05 16:04:28,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:04:28,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:04:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:04:28,561 INFO L87 Difference]: Start difference. First operand 61754 states and 220179 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:32,485 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-05 16:04:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:33,553 INFO L93 Difference]: Finished difference Result 98374 states and 345299 transitions. [2021-06-05 16:04:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:04:33,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:04:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:33,775 INFO L225 Difference]: With dead ends: 98374 [2021-06-05 16:04:33,775 INFO L226 Difference]: Without dead ends: 98227 [2021-06-05 16:04:33,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 3343.9ms TimeCoverageRelationStatistics Valid=818, Invalid=4012, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:04:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98227 states. [2021-06-05 16:04:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98227 to 61760. [2021-06-05 16:04:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61760 states, 61759 states have (on average 3.565520814780032) internal successors, (220203), 61759 states have internal predecessors, (220203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61760 states to 61760 states and 220203 transitions. [2021-06-05 16:04:35,371 INFO L78 Accepts]: Start accepts. Automaton has 61760 states and 220203 transitions. Word has length 37 [2021-06-05 16:04:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:35,371 INFO L482 AbstractCegarLoop]: Abstraction has 61760 states and 220203 transitions. [2021-06-05 16:04:35,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 61760 states and 220203 transitions. [2021-06-05 16:04:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:04:35,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:35,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:04:35,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:35,669 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash 494966747, now seen corresponding path program 140 times [2021-06-05 16:04:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:35,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773442908] [2021-06-05 16:04:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:36,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:36,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773442908] [2021-06-05 16:04:36,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773442908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:36,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317274792] [2021-06-05 16:04:36,121 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 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 [2021-06-05 16:04:36,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:04:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:36,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:04:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:36,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:04:36,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:36,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:36,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:04:36,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:04:36,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:36,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:36,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:72 [2021-06-05 16:04:36,560 INFO L446 ElimStorePlain]: Different costs {3=[v_C_299], 6=[A, B]} [2021-06-05 16:04:36,587 INFO L354 Elim1Store]: treesize reduction 76, result has 14.6 percent of original size [2021-06-05 16:04:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 151 [2021-06-05 16:04:36,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:36,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 104 [2021-06-05 16:04:36,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:04:36,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:36,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 76 [2021-06-05 16:04:36,663 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:04:36,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:36,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:36,678 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:211, output treesize:92 [2021-06-05 16:04:40,875 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 16:04:44,555 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_31]} [2021-06-05 16:04:44,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:44,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:44,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 16:04:44,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:44,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:44,640 INFO L354 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2021-06-05 16:04:44,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 116 treesize of output 99 [2021-06-05 16:04:44,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:44,690 INFO L628 ElimStorePlain]: treesize reduction 54, result has 50.0 percent of original size [2021-06-05 16:04:44,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:04:44,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:186, output treesize:29 [2021-06-05 16:04:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317274792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:44,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:44,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 16:04:44,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760692166] [2021-06-05 16:04:44,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:04:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:04:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2021-06-05 16:04:44,756 INFO L87 Difference]: Start difference. First operand 61760 states and 220203 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:50,584 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 16:05:01,724 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 16:05:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:09,818 INFO L93 Difference]: Finished difference Result 99904 states and 349662 transitions. [2021-06-05 16:05:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:05:09,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:05:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:10,052 INFO L225 Difference]: With dead ends: 99904 [2021-06-05 16:05:10,053 INFO L226 Difference]: Without dead ends: 99556 [2021-06-05 16:05:10,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 15776.6ms TimeCoverageRelationStatistics Valid=1017, Invalid=5624, Unknown=1, NotChecked=0, Total=6642 [2021-06-05 16:05:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99556 states. [2021-06-05 16:05:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99556 to 61754. [2021-06-05 16:05:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61754 states, 61753 states have (on average 3.5654786002299486) internal successors, (220179), 61753 states have internal predecessors, (220179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61754 states to 61754 states and 220179 transitions. [2021-06-05 16:05:11,394 INFO L78 Accepts]: Start accepts. Automaton has 61754 states and 220179 transitions. Word has length 37 [2021-06-05 16:05:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:11,394 INFO L482 AbstractCegarLoop]: Abstraction has 61754 states and 220179 transitions. [2021-06-05 16:05:11,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 61754 states and 220179 transitions. [2021-06-05 16:05:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:05:11,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:11,479 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:11,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:11,680 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash 166862213, now seen corresponding path program 141 times [2021-06-05 16:05:11,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:11,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406362970] [2021-06-05 16:05:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:12,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406362970] [2021-06-05 16:05:12,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406362970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095271838] [2021-06-05 16:05:12,095 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 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 [2021-06-05 16:05:12,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:05:12,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:12,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 16:05:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:05:12,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:12,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:12,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:12,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-06-05 16:05:12,289 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-06-05 16:05:12,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:05:12,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:12,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:12,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:12,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:70 [2021-06-05 16:05:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:12,517 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-06-05 16:05:12,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:05:12,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:12,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:12,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:12,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:106, output treesize:105 [2021-06-05 16:05:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:12,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 103 [2021-06-05 16:05:12,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:05:13,034 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 16:05:13,034 INFO L628 ElimStorePlain]: treesize reduction 159, result has 48.5 percent of original size [2021-06-05 16:05:13,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:13,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:125, output treesize:169 [2021-06-05 16:05:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:13,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 56 [2021-06-05 16:05:13,327 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:05:13,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:13,603 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 16:05:13,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:13,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 49 [2021-06-05 16:05:13,611 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:05:13,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:13,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:13,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:68, output treesize:19 [2021-06-05 16:05:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:13,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095271838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:13,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:13,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 16:05:13,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443259274] [2021-06-05 16:05:13,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:05:13,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:13,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:05:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:05:13,708 INFO L87 Difference]: Start difference. First operand 61754 states and 220179 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:18,380 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 16:05:18,753 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 16:05:19,487 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-06-05 16:05:20,838 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2021-06-05 16:05:21,083 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-06-05 16:05:21,427 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 16:05:21,917 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-06-05 16:05:22,197 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2021-06-05 16:05:22,413 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2021-06-05 16:05:23,424 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-06-05 16:05:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:25,231 INFO L93 Difference]: Finished difference Result 97932 states and 344118 transitions. [2021-06-05 16:05:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 16:05:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:05:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:25,454 INFO L225 Difference]: With dead ends: 97932 [2021-06-05 16:05:25,454 INFO L226 Difference]: Without dead ends: 97876 [2021-06-05 16:05:25,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3438 ImplicationChecksByTransitivity, 8218.4ms TimeCoverageRelationStatistics Valid=1073, Invalid=9639, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 16:05:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97876 states. [2021-06-05 16:05:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97876 to 61754. [2021-06-05 16:05:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61754 states, 61753 states have (on average 3.5654786002299486) internal successors, (220179), 61753 states have internal predecessors, (220179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61754 states to 61754 states and 220179 transitions. [2021-06-05 16:05:26,760 INFO L78 Accepts]: Start accepts. Automaton has 61754 states and 220179 transitions. Word has length 37 [2021-06-05 16:05:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:26,760 INFO L482 AbstractCegarLoop]: Abstraction has 61754 states and 220179 transitions. [2021-06-05 16:05:26,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 61754 states and 220179 transitions. [2021-06-05 16:05:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:05:26,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:26,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:27,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1273 [2021-06-05 16:05:27,045 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1376880289, now seen corresponding path program 142 times [2021-06-05 16:05:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:27,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170908061] [2021-06-05 16:05:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:27,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:27,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170908061] [2021-06-05 16:05:27,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170908061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:27,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770881779] [2021-06-05 16:05:27,478 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 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 [2021-06-05 16:05:27,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:05:27,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:05:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:27,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:05:27,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:27,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:05:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:05:27,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:27,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:72 [2021-06-05 16:05:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-06-05 16:05:27,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:27,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:97, output treesize:96 [2021-06-05 16:05:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:27,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-06-05 16:05:27,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:27,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:27,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:68 [2021-06-05 16:05:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:05:27,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:28,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-06-05 16:05:28,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:28,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:28,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:28,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 16:05:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:28,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770881779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:28,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:28,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:05:28,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753240294] [2021-06-05 16:05:28,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:05:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:28,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:05:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:05:28,029 INFO L87 Difference]: Start difference. First operand 61754 states and 220179 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:33,220 INFO L93 Difference]: Finished difference Result 118165 states and 414408 transitions. [2021-06-05 16:05:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:05:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:05:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:33,518 INFO L225 Difference]: With dead ends: 118165 [2021-06-05 16:05:33,518 INFO L226 Difference]: Without dead ends: 118096 [2021-06-05 16:05:33,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 3395.1ms TimeCoverageRelationStatistics Valid=878, Invalid=4822, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:05:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118096 states. [2021-06-05 16:05:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118096 to 61799. [2021-06-05 16:05:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61799 states, 61798 states have (on average 3.5651477394090425) internal successors, (220319), 61798 states have internal predecessors, (220319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61799 states to 61799 states and 220319 transitions. [2021-06-05 16:05:34,905 INFO L78 Accepts]: Start accepts. Automaton has 61799 states and 220319 transitions. Word has length 37 [2021-06-05 16:05:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:34,905 INFO L482 AbstractCegarLoop]: Abstraction has 61799 states and 220319 transitions. [2021-06-05 16:05:34,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 61799 states and 220319 transitions. [2021-06-05 16:05:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:05:34,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:34,989 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:35,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1294,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:35,189 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -951933079, now seen corresponding path program 143 times [2021-06-05 16:05:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:35,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241464629] [2021-06-05 16:05:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:35,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:35,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241464629] [2021-06-05 16:05:35,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241464629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:35,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136859172] [2021-06-05 16:05:35,623 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 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 [2021-06-05 16:05:35,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:05:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:35,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 16:05:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:35,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:05:35,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:35,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:35,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:35,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 16:05:35,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:05:35,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:35,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:35,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:35,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 16:05:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:36,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 49 [2021-06-05 16:05:36,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:36,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:75 [2021-06-05 16:05:36,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:36,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:36,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:36,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 16:05:36,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:36,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:36,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:36,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 16:05:36,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:36,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,258 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:33 [2021-06-05 16:05:36,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:05:36,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:36,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:36,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-06-05 16:05:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136859172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:36,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:36,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 16:05:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957726200] [2021-06-05 16:05:36,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:05:36,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:36,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:05:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:05:36,362 INFO L87 Difference]: Start difference. First operand 61799 states and 220319 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:37,058 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 16:05:41,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:41,906 INFO L93 Difference]: Finished difference Result 100544 states and 352237 transitions. [2021-06-05 16:05:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:05:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:05:41,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:42,152 INFO L225 Difference]: With dead ends: 100544 [2021-06-05 16:05:42,152 INFO L226 Difference]: Without dead ends: 100318 [2021-06-05 16:05:42,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 3749.8ms TimeCoverageRelationStatistics Valid=934, Invalid=4468, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:05:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100318 states. [2021-06-05 16:05:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100318 to 61835. [2021-06-05 16:05:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61835 states, 61834 states have (on average 3.5647863634893424) internal successors, (220425), 61834 states have internal predecessors, (220425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61835 states to 61835 states and 220425 transitions. [2021-06-05 16:05:43,468 INFO L78 Accepts]: Start accepts. Automaton has 61835 states and 220425 transitions. Word has length 37 [2021-06-05 16:05:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:43,468 INFO L482 AbstractCegarLoop]: Abstraction has 61835 states and 220425 transitions. [2021-06-05 16:05:43,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 61835 states and 220425 transitions. [2021-06-05 16:05:43,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:05:43,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:43,556 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:43,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:43,756 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1393322339, now seen corresponding path program 144 times [2021-06-05 16:05:43,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:43,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35758702] [2021-06-05 16:05:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:44,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35758702] [2021-06-05 16:05:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35758702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555473121] [2021-06-05 16:05:44,199 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 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 [2021-06-05 16:05:44,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:05:44,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 16:05:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:44,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:05:44,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:44,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:44,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:44,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:05:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:05:44,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:44,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:44,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:44,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:73 [2021-06-05 16:05:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 53 [2021-06-05 16:05:44,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:44,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:44,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:44,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:102 [2021-06-05 16:05:44,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:44,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 69 [2021-06-05 16:05:44,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:05:44,865 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.8 percent of original size [2021-06-05 16:05:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:44,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:44,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 69 [2021-06-05 16:05:44,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:44,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:44,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:44,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:108, output treesize:77 [2021-06-05 16:05:45,417 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_33], 3=[C]} [2021-06-05 16:05:45,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-05 16:05:45,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:45,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:45,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:45,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:45,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:05:45,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:45,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:45,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:05:45,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:59, output treesize:20 [2021-06-05 16:05:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:45,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555473121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:45,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:45,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 16:05:45,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808275028] [2021-06-05 16:05:45,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:05:45,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:05:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:05:45,528 INFO L87 Difference]: Start difference. First operand 61835 states and 220425 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:50,466 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 16:05:51,483 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:05:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:52,659 INFO L93 Difference]: Finished difference Result 99844 states and 350029 transitions. [2021-06-05 16:05:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:05:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:05:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:52,899 INFO L225 Difference]: With dead ends: 99844 [2021-06-05 16:05:52,899 INFO L226 Difference]: Without dead ends: 99691 [2021-06-05 16:05:52,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 4495.3ms TimeCoverageRelationStatistics Valid=786, Invalid=5066, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:05:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99691 states. [2021-06-05 16:05:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99691 to 61829. [2021-06-05 16:05:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61829 states, 61828 states have (on average 3.564873520087986) internal successors, (220409), 61828 states have internal predecessors, (220409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61829 states to 61829 states and 220409 transitions. [2021-06-05 16:05:54,217 INFO L78 Accepts]: Start accepts. Automaton has 61829 states and 220409 transitions. Word has length 37 [2021-06-05 16:05:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:54,217 INFO L482 AbstractCegarLoop]: Abstraction has 61829 states and 220409 transitions. [2021-06-05 16:05:54,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 61829 states and 220409 transitions. [2021-06-05 16:05:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:05:54,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:54,301 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:54,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:54,501 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 997127455, now seen corresponding path program 145 times [2021-06-05 16:05:54,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:54,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170908399] [2021-06-05 16:05:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:55,064 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-06-05 16:05:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:55,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170908399] [2021-06-05 16:05:55,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170908399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565138348] [2021-06-05 16:05:55,202 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 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 [2021-06-05 16:05:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:05:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:05:55,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:55,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:05:55,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:05:55,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:55,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:84 [2021-06-05 16:05:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:55,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:55,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:05:55,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:55,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:55,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:212, output treesize:211 [2021-06-05 16:05:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2021-06-05 16:05:55,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:05:55,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:55,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:22 [2021-06-05 16:05:55,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 16:05:55,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:55,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:55,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:05:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:56,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565138348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:56,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:56,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:05:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965305751] [2021-06-05 16:05:56,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:05:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:05:56,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:05:56,015 INFO L87 Difference]: Start difference. First operand 61829 states and 220409 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:56,675 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:05:59,991 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 16:06:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:01,747 INFO L93 Difference]: Finished difference Result 111940 states and 390673 transitions. [2021-06-05 16:06:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:06:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:02,017 INFO L225 Difference]: With dead ends: 111940 [2021-06-05 16:06:02,017 INFO L226 Difference]: Without dead ends: 111757 [2021-06-05 16:06:02,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 4081.1ms TimeCoverageRelationStatistics Valid=859, Invalid=4397, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:06:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111757 states. [2021-06-05 16:06:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111757 to 61841. [2021-06-05 16:06:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61841 states, 61840 states have (on average 3.5646021992238035) internal successors, (220435), 61840 states have internal predecessors, (220435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61841 states to 61841 states and 220435 transitions. [2021-06-05 16:06:03,422 INFO L78 Accepts]: Start accepts. Automaton has 61841 states and 220435 transitions. Word has length 37 [2021-06-05 16:06:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:03,422 INFO L482 AbstractCegarLoop]: Abstraction has 61841 states and 220435 transitions. [2021-06-05 16:06:03,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61841 states and 220435 transitions. [2021-06-05 16:06:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:03,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:03,512 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:03,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:03,712 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash 273918619, now seen corresponding path program 146 times [2021-06-05 16:06:03,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:03,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847927307] [2021-06-05 16:06:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:04,408 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 16:06:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:04,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:04,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847927307] [2021-06-05 16:06:04,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847927307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:04,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603616324] [2021-06-05 16:06:04,460 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 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 [2021-06-05 16:06:04,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:04,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:06:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:04,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:06:04,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:04,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:06:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:06:04,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:04,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:45 [2021-06-05 16:06:04,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2021-06-05 16:06:04,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:04,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-06-05 16:06:04,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 16:06:04,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:04,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-06-05 16:06:04,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:04,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:21 [2021-06-05 16:06:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 16:06:04,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:04,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:04,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:06:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:04,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603616324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:04,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:04,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:06:04,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945149086] [2021-06-05 16:06:04,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:04,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:04,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:04,929 INFO L87 Difference]: Start difference. First operand 61841 states and 220435 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:10,722 INFO L93 Difference]: Finished difference Result 105636 states and 370196 transitions. [2021-06-05 16:06:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:06:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:10,977 INFO L225 Difference]: With dead ends: 105636 [2021-06-05 16:06:10,977 INFO L226 Difference]: Without dead ends: 105429 [2021-06-05 16:06:10,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 4102.5ms TimeCoverageRelationStatistics Valid=925, Invalid=4625, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:06:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105429 states. [2021-06-05 16:06:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105429 to 61832. [2021-06-05 16:06:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61832 states, 61831 states have (on average 3.56465203538678) internal successors, (220406), 61831 states have internal predecessors, (220406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61832 states to 61832 states and 220406 transitions. [2021-06-05 16:06:12,309 INFO L78 Accepts]: Start accepts. Automaton has 61832 states and 220406 transitions. Word has length 37 [2021-06-05 16:06:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:12,309 INFO L482 AbstractCegarLoop]: Abstraction has 61832 states and 220406 transitions. [2021-06-05 16:06:12,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 61832 states and 220406 transitions. [2021-06-05 16:06:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:12,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:12,392 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:12,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-05 16:06:12,593 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash -335393339, now seen corresponding path program 147 times [2021-06-05 16:06:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863158458] [2021-06-05 16:06:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:13,042 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 18 [2021-06-05 16:06:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:13,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:13,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863158458] [2021-06-05 16:06:13,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863158458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:13,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298545919] [2021-06-05 16:06:13,285 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 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 [2021-06-05 16:06:13,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:06:13,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:13,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 16:06:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:13,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:06:13,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:13,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:13,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:13,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 16:06:13,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:06:13,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:13,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:13,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:13,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 16:06:13,560 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:06:13,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 16:06:13,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:13,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:13,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:13,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:64 [2021-06-05 16:06:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:13,929 INFO L354 Elim1Store]: treesize reduction 16, result has 73.8 percent of original size [2021-06-05 16:06:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 83 [2021-06-05 16:06:13,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:06:14,030 INFO L628 ElimStorePlain]: treesize reduction 95, result has 58.0 percent of original size [2021-06-05 16:06:14,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:14,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:234 [2021-06-05 16:06:14,463 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 16:06:14,818 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_36, v_prenex_37], 3=[A, B]} [2021-06-05 16:06:14,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:06:14,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:14,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:06:14,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:14,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:14,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:14,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:06:14,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:14,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:14,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:14,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:14,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:06:14,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:14,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:14,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:06:14,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:92, output treesize:20 [2021-06-05 16:06:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298545919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:14,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:14,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 16:06:14,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211238331] [2021-06-05 16:06:14,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:06:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:06:14,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:06:14,984 INFO L87 Difference]: Start difference. First operand 61832 states and 220406 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:18,788 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-05 16:06:20,316 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-06-05 16:06:20,748 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 16:06:21,022 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 16:06:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:21,857 INFO L93 Difference]: Finished difference Result 89998 states and 315083 transitions. [2021-06-05 16:06:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:06:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:22,039 INFO L225 Difference]: With dead ends: 89998 [2021-06-05 16:06:22,040 INFO L226 Difference]: Without dead ends: 89902 [2021-06-05 16:06:22,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 5422.9ms TimeCoverageRelationStatistics Valid=618, Invalid=5080, Unknown=2, NotChecked=0, Total=5700 [2021-06-05 16:06:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89902 states. [2021-06-05 16:06:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89902 to 61872. [2021-06-05 16:06:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61872 states, 61871 states have (on average 3.5643193095311214) internal successors, (220528), 61871 states have internal predecessors, (220528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61872 states to 61872 states and 220528 transitions. [2021-06-05 16:06:23,282 INFO L78 Accepts]: Start accepts. Automaton has 61872 states and 220528 transitions. Word has length 37 [2021-06-05 16:06:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:23,282 INFO L482 AbstractCegarLoop]: Abstraction has 61872 states and 220528 transitions. [2021-06-05 16:06:23,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 61872 states and 220528 transitions. [2021-06-05 16:06:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:23,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:23,366 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:23,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1309,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:23,567 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2108220641, now seen corresponding path program 148 times [2021-06-05 16:06:23,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:23,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063982881] [2021-06-05 16:06:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:23,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:23,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063982881] [2021-06-05 16:06:23,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063982881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:23,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55787849] [2021-06-05 16:06:23,931 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 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 [2021-06-05 16:06:23,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:06:23,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:06:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:24,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:06:24,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:24,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:06:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:06:24,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:24,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:79 [2021-06-05 16:06:24,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 59 [2021-06-05 16:06:24,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:24,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:84 [2021-06-05 16:06:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:24,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-06-05 16:06:24,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:24,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:90, output treesize:58 [2021-06-05 16:06:24,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:06:24,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:06:24,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:24,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:24,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-06-05 16:06:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:24,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55787849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:24,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:24,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:06:24,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404473313] [2021-06-05 16:06:24,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:24,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:24,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:24,444 INFO L87 Difference]: Start difference. First operand 61872 states and 220528 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:06:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:27,443 INFO L93 Difference]: Finished difference Result 99138 states and 345637 transitions. [2021-06-05 16:06:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:06:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:27,683 INFO L225 Difference]: With dead ends: 99138 [2021-06-05 16:06:27,683 INFO L226 Difference]: Without dead ends: 99074 [2021-06-05 16:06:27,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1907.1ms TimeCoverageRelationStatistics Valid=454, Invalid=1996, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:06:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99074 states. [2021-06-05 16:06:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99074 to 61878. [2021-06-05 16:06:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61878 states, 61877 states have (on average 3.5640706563020186) internal successors, (220534), 61877 states have internal predecessors, (220534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61878 states to 61878 states and 220534 transitions. [2021-06-05 16:06:29,135 INFO L78 Accepts]: Start accepts. Automaton has 61878 states and 220534 transitions. Word has length 37 [2021-06-05 16:06:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:29,136 INFO L482 AbstractCegarLoop]: Abstraction has 61878 states and 220534 transitions. [2021-06-05 16:06:29,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:06:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 61878 states and 220534 transitions. [2021-06-05 16:06:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:29,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:29,529 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:29,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1344 [2021-06-05 16:06:29,744 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1755844951, now seen corresponding path program 149 times [2021-06-05 16:06:29,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:29,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262847226] [2021-06-05 16:06:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:30,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262847226] [2021-06-05 16:06:30,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262847226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68816670] [2021-06-05 16:06:30,106 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 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 [2021-06-05 16:06:30,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:06:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 16:06:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:30,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:06:30,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:30,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:30,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:30,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:06:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,334 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:06:30,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:06:30,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:30,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:30,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:30,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:80 [2021-06-05 16:06:30,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,560 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 16:06:30,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 66 [2021-06-05 16:06:30,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:30,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:30,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:30,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:91 [2021-06-05 16:06:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:30,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 129 [2021-06-05 16:06:31,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:31,402 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 84 [2021-06-05 16:06:31,402 INFO L628 ElimStorePlain]: treesize reduction 1065, result has 18.3 percent of original size [2021-06-05 16:06:31,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:31,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:116, output treesize:254 [2021-06-05 16:06:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:31,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:31,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-06-05 16:06:31,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:31,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:31,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 16:06:31,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:31,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:31,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:31,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:5 [2021-06-05 16:06:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:31,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68816670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:31,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:31,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 16:06:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661057839] [2021-06-05 16:06:31,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:06:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:06:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=686, Unknown=3, NotChecked=0, Total=812 [2021-06-05 16:06:31,827 INFO L87 Difference]: Start difference. First operand 61878 states and 220534 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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) [2021-06-05 16:06:34,947 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 16:06:35,518 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 16:06:36,482 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 16:06:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:38,106 INFO L93 Difference]: Finished difference Result 90339 states and 314788 transitions. [2021-06-05 16:06:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:06:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:38,288 INFO L225 Difference]: With dead ends: 90339 [2021-06-05 16:06:38,288 INFO L226 Difference]: Without dead ends: 90300 [2021-06-05 16:06:38,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 3895.6ms TimeCoverageRelationStatistics Valid=630, Invalid=3921, Unknown=5, NotChecked=0, Total=4556 [2021-06-05 16:06:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90300 states. [2021-06-05 16:06:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90300 to 61940. [2021-06-05 16:06:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61940 states, 61939 states have (on average 3.5637320589612362) internal successors, (220734), 61939 states have internal predecessors, (220734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61940 states to 61940 states and 220734 transitions. [2021-06-05 16:06:39,567 INFO L78 Accepts]: Start accepts. Automaton has 61940 states and 220734 transitions. Word has length 37 [2021-06-05 16:06:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:39,567 INFO L482 AbstractCegarLoop]: Abstraction has 61940 states and 220734 transitions. [2021-06-05 16:06:39,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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) [2021-06-05 16:06:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 61940 states and 220734 transitions. [2021-06-05 16:06:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:39,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:39,654 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:39,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-06-05 16:06:39,854 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:39,854 INFO L82 PathProgramCache]: Analyzing trace with hash 362996329, now seen corresponding path program 150 times [2021-06-05 16:06:39,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:39,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135373421] [2021-06-05 16:06:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135373421] [2021-06-05 16:06:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135373421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091935877] [2021-06-05 16:06:40,213 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 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 [2021-06-05 16:06:40,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:06:40,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 16:06:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:06:40,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:40,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:06:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:40,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:06:40,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:40,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:06:40,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 16:06:40,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:40,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:62 [2021-06-05 16:06:40,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:40,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 63 [2021-06-05 16:06:40,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:40,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:40,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:353 [2021-06-05 16:06:41,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:41,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 16:06:41,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:41,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-06-05 16:06:41,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:06:41,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:41,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 16:06:41,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:41,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-06-05 16:06:41,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:41,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:41,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 16:06:41,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:41,192 INFO L628 ElimStorePlain]: treesize reduction 172, result has 37.7 percent of original size [2021-06-05 16:06:41,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:41,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 16:06:41,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 16:06:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:41,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:41,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:06:41,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 16:06:41,235 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:41,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:41,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:06:41,264 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:262, output treesize:49 [2021-06-05 16:06:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:41,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091935877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:41,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:41,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 16:06:41,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526075368] [2021-06-05 16:06:41,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:06:41,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:06:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:06:41,395 INFO L87 Difference]: Start difference. First operand 61940 states and 220734 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:44,476 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 16:06:44,746 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 16:06:44,973 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 16:06:45,359 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-05 16:06:46,037 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 16:06:46,501 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:06:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:47,910 INFO L93 Difference]: Finished difference Result 138758 states and 484523 transitions. [2021-06-05 16:06:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:06:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:48,263 INFO L225 Difference]: With dead ends: 138758 [2021-06-05 16:06:48,263 INFO L226 Difference]: Without dead ends: 138715 [2021-06-05 16:06:48,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2226 ImplicationChecksByTransitivity, 5017.0ms TimeCoverageRelationStatistics Valid=1176, Invalid=5466, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:06:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138715 states. [2021-06-05 16:06:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138715 to 61938. [2021-06-05 16:06:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61938 states, 61937 states have (on average 3.5637179714871565) internal successors, (220726), 61937 states have internal predecessors, (220726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61938 states to 61938 states and 220726 transitions. [2021-06-05 16:06:50,118 INFO L78 Accepts]: Start accepts. Automaton has 61938 states and 220726 transitions. Word has length 37 [2021-06-05 16:06:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:50,118 INFO L482 AbstractCegarLoop]: Abstraction has 61938 states and 220726 transitions. [2021-06-05 16:06:50,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 61938 states and 220726 transitions. [2021-06-05 16:06:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:50,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:50,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:50,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 16:06:50,402 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1519304301, now seen corresponding path program 151 times [2021-06-05 16:06:50,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:50,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563725581] [2021-06-05 16:06:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:50,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:50,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563725581] [2021-06-05 16:06:50,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563725581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:50,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394707258] [2021-06-05 16:06:50,762 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 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 [2021-06-05 16:06:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:06:50,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:50,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:06:50,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:50,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:06:50,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:06:50,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:50,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:78 [2021-06-05 16:06:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:06:51,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:91, output treesize:90 [2021-06-05 16:06:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 62 [2021-06-05 16:06:51,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:51,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2021-06-05 16:06:51,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:42 [2021-06-05 16:06:51,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:06:51,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-06-05 16:06:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394707258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:51,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:51,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:06:51,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492640104] [2021-06-05 16:06:51,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:51,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:51,321 INFO L87 Difference]: Start difference. First operand 61938 states and 220726 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:52,249 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 16:06:53,363 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 16:06:55,600 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 16:06:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:56,281 INFO L93 Difference]: Finished difference Result 113622 states and 395755 transitions. [2021-06-05 16:06:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:06:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:56,810 INFO L225 Difference]: With dead ends: 113622 [2021-06-05 16:06:56,810 INFO L226 Difference]: Without dead ends: 113511 [2021-06-05 16:06:56,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 3540.5ms TimeCoverageRelationStatistics Valid=841, Invalid=3449, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:06:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113511 states. [2021-06-05 16:06:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113511 to 61938. [2021-06-05 16:06:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61938 states, 61937 states have (on average 3.563524226229879) internal successors, (220714), 61937 states have internal predecessors, (220714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61938 states to 61938 states and 220714 transitions. [2021-06-05 16:06:58,222 INFO L78 Accepts]: Start accepts. Automaton has 61938 states and 220714 transitions. Word has length 37 [2021-06-05 16:06:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:58,222 INFO L482 AbstractCegarLoop]: Abstraction has 61938 states and 220714 transitions. [2021-06-05 16:06:58,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 61938 states and 220714 transitions. [2021-06-05 16:06:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:58,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:58,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:58,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-05 16:06:58,508 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:58,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1471748643, now seen corresponding path program 152 times [2021-06-05 16:06:58,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:58,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746688215] [2021-06-05 16:06:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:58,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:58,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746688215] [2021-06-05 16:06:58,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746688215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:58,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110774599] [2021-06-05 16:06:58,884 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 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 [2021-06-05 16:06:58,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 16:06:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:58,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:06:58,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:58,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:06:59,088 INFO L354 Elim1Store]: treesize reduction 80, result has 10.1 percent of original size [2021-06-05 16:06:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 112 [2021-06-05 16:06:59,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:157, output treesize:47 [2021-06-05 16:06:59,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-06-05 16:06:59,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 16:06:59,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 16:06:59,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:47 [2021-06-05 16:06:59,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:06:59,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:06:59,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-06-05 16:06:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:59,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110774599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:59,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:59,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 16:06:59,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784440082] [2021-06-05 16:06:59,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:59,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:59,417 INFO L87 Difference]: Start difference. First operand 61938 states and 220714 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:07:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:01,815 INFO L93 Difference]: Finished difference Result 78886 states and 275327 transitions. [2021-06-05 16:07:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:07:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:07:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:01,990 INFO L225 Difference]: With dead ends: 78886 [2021-06-05 16:07:01,990 INFO L226 Difference]: Without dead ends: 78831 [2021-06-05 16:07:01,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1535.1ms TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:07:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78831 states. [2021-06-05 16:07:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78831 to 61962. [2021-06-05 16:07:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61962 states, 61961 states have (on average 3.5634027856232144) internal successors, (220792), 61961 states have internal predecessors, (220792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61962 states to 61962 states and 220792 transitions. [2021-06-05 16:07:03,262 INFO L78 Accepts]: Start accepts. Automaton has 61962 states and 220792 transitions. Word has length 37 [2021-06-05 16:07:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:03,262 INFO L482 AbstractCegarLoop]: Abstraction has 61962 states and 220792 transitions. [2021-06-05 16:07:03,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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) [2021-06-05 16:07:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 61962 states and 220792 transitions. [2021-06-05 16:07:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:07:03,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:03,351 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:03,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1400,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:03,551 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 451930599, now seen corresponding path program 153 times [2021-06-05 16:07:03,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:03,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442577068] [2021-06-05 16:07:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:03,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442577068] [2021-06-05 16:07:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442577068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473219518] [2021-06-05 16:07:03,915 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 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 [2021-06-05 16:07:03,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:07:03,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 16:07:03,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:04,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:04,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:04,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:04,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:04,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:07:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:04,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-06-05 16:07:04,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:04,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:04,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:69 [2021-06-05 16:07:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:04,274 INFO L354 Elim1Store]: treesize reduction 46, result has 22.0 percent of original size [2021-06-05 16:07:04,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 16:07:04,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:04,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:04,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:04,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:88 [2021-06-05 16:07:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:04,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-06-05 16:07:05,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:05,075 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.8 percent of original size [2021-06-05 16:07:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:05,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:05,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:05,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 16:07:05,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:05,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:05,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:05,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:92, output treesize:46 [2021-06-05 16:07:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:05,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:05,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 16:07:05,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 16:07:05,265 INFO L628 ElimStorePlain]: treesize reduction 137, result has 19.4 percent of original size [2021-06-05 16:07:05,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:05,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:34 [2021-06-05 16:07:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473219518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:05,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:05,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 16:07:05,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61868722] [2021-06-05 16:07:05,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:07:05,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:07:05,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=755, Unknown=1, NotChecked=0, Total=870 [2021-06-05 16:07:05,416 INFO L87 Difference]: Start difference. First operand 61962 states and 220792 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:06,501 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 16:07:09,753 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 16:07:10,008 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:07:10,224 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 Received shutdown request... [2021-06-05 16:07:10,588 WARN L222 SmtUtils]: Removed 9 from assertion stack [2021-06-05 16:07:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:07:10,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-05 16:07:10,793 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:07:10,794 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:07:10,795 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:07:10,795 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:07:10 BasicIcfg [2021-06-05 16:07:10,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:07:10,796 INFO L168 Benchmark]: Toolchain (without parser) took 769133.07 ms. Allocated memory was 402.7 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 382.0 MB in the beginning and 10.0 GB in the end (delta: -9.6 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. [2021-06-05 16:07:10,796 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 402.7 MB. Free memory was 383.3 MB in the beginning and 383.2 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:07:10,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.45 ms. Allocated memory is still 402.7 MB. Free memory was 382.0 MB in the beginning and 380.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:10,796 INFO L168 Benchmark]: Boogie Preprocessor took 12.38 ms. Allocated memory is still 402.7 MB. Free memory was 380.5 MB in the beginning and 379.6 MB in the end (delta: 986.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:10,796 INFO L168 Benchmark]: RCFGBuilder took 211.43 ms. Allocated memory is still 402.7 MB. Free memory was 379.4 MB in the beginning and 365.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:10,796 INFO L168 Benchmark]: TraceAbstraction took 768882.40 ms. Allocated memory was 402.7 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 364.8 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. [2021-06-05 16:07:10,796 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 0.10 ms. Allocated memory is still 402.7 MB. Free memory was 383.3 MB in the beginning and 383.2 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.45 ms. Allocated memory is still 402.7 MB. Free memory was 382.0 MB in the beginning and 380.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.38 ms. Allocated memory is still 402.7 MB. Free memory was 380.5 MB in the beginning and 379.6 MB in the end (delta: 986.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 211.43 ms. Allocated memory is still 402.7 MB. Free memory was 379.4 MB in the beginning and 365.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 768882.40 ms. Allocated memory was 402.7 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 364.8 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (61962states) and FLOYD_HOARE automaton (currently 52 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 17ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (61962states) and FLOYD_HOARE automaton (currently 52 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 17ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (61962states) and FLOYD_HOARE automaton (currently 52 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 17ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (61962states) and FLOYD_HOARE automaton (currently 52 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 17ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 768776.3ms, OverallIterations: 163, TraceHistogramMax: 3, EmptinessCheckTime: 10447.7ms, AutomataDifference: 445308.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7456 SDtfs, 44008 SDslu, 80401 SDs, 0 SdLazy, 214399 SolverSat, 10430 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 167568.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10800 GetRequests, 3894 SyntacticMatches, 191 SemanticMatches, 6714 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107282 ImplicationChecksByTransitivity, 278206.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=139263occurred in iteration=71, InterpolantAutomatonStates: 5525, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 141091.4ms AutomataMinimizationTime, 162 MinimizatonAttempts, 3287660 StatesRemovedByMinimization, 162 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 575.0ms SsaConstructionTime, 2289.4ms SatisfiabilityAnalysisTime, 133910.9ms InterpolantComputationTime, 10613 NumberOfCodeBlocks, 10606 NumberOfCodeBlocksAsserted, 658 NumberOfCheckSat, 10294 ConstructedInterpolants, 346 QuantifiedInterpolants, 300394 SizeOfPredicates, 987 NumberOfNonLiveVariables, 15078 ConjunctsInSsa, 5599 ConjunctsInUnsatCore, 319 InterpolantComputations, 7 PerfectInterpolantSequences, 513/7016 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