/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:15:28,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:15:28,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:15:28,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:15:28,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 19:15:28,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:15:28,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:15:28,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:15:28,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:15:28,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:15:28,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:15:28,179 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:15:28,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:15:28,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:15:28,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:15:28,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:15:28,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:15:28,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:15:28,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:15:28,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:15:28,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:15:28,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:15:28,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:15:28,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:15:28,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:15:28,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:15:28,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:15:28,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:15:28,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:15:28,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:15:28,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:15:28,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:15:28,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:15:28,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:15:28,589 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:15:28,590 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:15:28,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl [2021-02-19 19:15:28,592 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl' [2021-02-19 19:15:28,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:15:28,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:15:28,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:15:28,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:15:28,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:15:28,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:15:28,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:15:28,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:15:28,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:15:28,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/1) ... [2021-02-19 19:15:28,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:15:28,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:15:28,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:15:28,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:15:28,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (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 [2021-02-19 19:15:29,018 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:15:29,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:15:29,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:15:29,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:15:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:15:29,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:15:29,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:15:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:15:29,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:15:29,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:15:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:15:29,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:15:29,022 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:15:29,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:15:29,227 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:15:29,228 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:15:29 BoogieIcfgContainer [2021-02-19 19:15:29,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:15:29,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:15:29,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:15:29,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:15:29,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:15:28" (1/2) ... [2021-02-19 19:15:29,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745233ad and model type mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:15:29, skipping insertion in model container [2021-02-19 19:15:29,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:15:29" (2/2) ... [2021-02-19 19:15:29,236 INFO L111 eAbstractionObserver]: Analyzing ICFG mts.wvr.bpl [2021-02-19 19:15:29,242 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:15:29,242 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:15:29,246 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:15:29,247 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:15:29,298 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 19:15:29,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 19:15:29,351 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:15:29,351 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:15:29,352 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:15:29,352 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:15:29,352 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:15:29,352 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:15:29,352 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:15:29,352 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:15:29,369 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-02-19 19:15:29,403 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 19:15:29,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:29,414 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:29,415 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:29,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1131357778, now seen corresponding path program 1 times [2021-02-19 19:15:29,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:29,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994155182] [2021-02-19 19:15:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:29,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994155182] [2021-02-19 19:15:29,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:15:29,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:15:29,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005616446] [2021-02-19 19:15:29,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:15:29,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:15:29,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:15:29,718 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 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) [2021-02-19 19:15:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:29,832 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-02-19 19:15:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:15:29,834 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 [2021-02-19 19:15:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:29,849 INFO L225 Difference]: With dead ends: 154 [2021-02-19 19:15:29,850 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 19:15:29,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:15:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 19:15:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-02-19 19:15:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-02-19 19:15:29,933 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-02-19 19:15:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:29,934 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-02-19 19:15:29,934 INFO L481 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) [2021-02-19 19:15:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-02-19 19:15:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 19:15:29,940 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:29,940 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:29,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:15:29,941 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1025868142, now seen corresponding path program 1 times [2021-02-19 19:15:29,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:29,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625570144] [2021-02-19 19:15:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:30,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625570144] [2021-02-19 19:15:30,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:15:30,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:15:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273520235] [2021-02-19 19:15:30,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:15:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:30,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:15:30,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:15:30,057 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:30,114 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-02-19 19:15:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:15:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 19:15:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:30,118 INFO L225 Difference]: With dead ends: 158 [2021-02-19 19:15:30,118 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 19:15:30,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:15:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 19:15:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-02-19 19:15:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-02-19 19:15:30,148 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-02-19 19:15:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:30,148 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-02-19 19:15:30,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-02-19 19:15:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:15:30,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:30,155 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:30,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:15:30,155 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1057833904, now seen corresponding path program 1 times [2021-02-19 19:15:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:30,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92621466] [2021-02-19 19:15:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:30,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92621466] [2021-02-19 19:15:30,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51451823] [2021-02-19 19:15:30,596 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 [2021-02-19 19:15:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:15:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:31,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 19:15:31,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:31,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 19:15:31,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:31,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-02-19 19:15:31,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:31,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-02-19 19:15:31,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:31,404 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-02-19 19:15:31,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:15:31,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-02-19 19:15:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:31,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:31,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:15:31,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525239627] [2021-02-19 19:15:31,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:31,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:31,483 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-02-19 19:15:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:31,830 INFO L93 Difference]: Finished difference Result 346 states and 983 transitions. [2021-02-19 19:15:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:15:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-02-19 19:15:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:31,835 INFO L225 Difference]: With dead ends: 346 [2021-02-19 19:15:31,835 INFO L226 Difference]: Without dead ends: 331 [2021-02-19 19:15:31,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:15:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-19 19:15:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 224. [2021-02-19 19:15:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-02-19 19:15:31,863 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-02-19 19:15:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:31,864 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-02-19 19:15:31,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-02-19 19:15:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-02-19 19:15:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:15:31,866 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:31,866 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:32,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 19:15:32,082 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash 890024812, now seen corresponding path program 2 times [2021-02-19 19:15:32,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:32,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487478894] [2021-02-19 19:15:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:32,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487478894] [2021-02-19 19:15:32,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399254150] [2021-02-19 19:15:32,388 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) [2021-02-19 19:15:32,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:32,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:15:32,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:32,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:15:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-02-19 19:15:32,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:32,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:15:32,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:15:32,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:32,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:15:32,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:15:32,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:32,694 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:15:32,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-02-19 19:15:32,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:32,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:15:32,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:15:32,752 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:73 [2021-02-19 19:15:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:32,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:32,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-02-19 19:15:32,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599624913] [2021-02-19 19:15:32,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:15:32,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:32,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:15:32,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:15:32,894 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-02-19 19:15:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:33,585 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-02-19 19:15:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:15:33,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 22 [2021-02-19 19:15:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:33,589 INFO L225 Difference]: With dead ends: 374 [2021-02-19 19:15:33,590 INFO L226 Difference]: Without dead ends: 359 [2021-02-19 19:15:33,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:15:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-02-19 19:15:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-02-19 19:15:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-02-19 19:15:33,607 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-02-19 19:15:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:33,607 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-02-19 19:15:33,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-02-19 19:15:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-02-19 19:15:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:15:33,608 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:33,609 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:33,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:15:33,832 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1188798260, now seen corresponding path program 3 times [2021-02-19 19:15:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:33,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591648732] [2021-02-19 19:15:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:34,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591648732] [2021-02-19 19:15:34,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583488477] [2021-02-19 19:15:34,102 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 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 [2021-02-19 19:15:34,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:15:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:15:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:34,389 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:15:34,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 19:15:34,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:34,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:15:34,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2021-02-19 19:15:34,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:34,460 INFO L628 ElimStorePlain]: treesize reduction 46, result has 53.1 percent of original size [2021-02-19 19:15:34,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:15:34,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 19:15:34,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:34,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:15:34,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:15:34,508 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:167, output treesize:27 [2021-02-19 19:15:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:34,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:34,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:15:34,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533734187] [2021-02-19 19:15:34,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:15:34,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:15:34,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:34,589 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-02-19 19:15:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:34,865 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-02-19 19:15:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:15:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 22 [2021-02-19 19:15:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:34,868 INFO L225 Difference]: With dead ends: 296 [2021-02-19 19:15:34,869 INFO L226 Difference]: Without dead ends: 281 [2021-02-19 19:15:34,869 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:15:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-02-19 19:15:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-02-19 19:15:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-02-19 19:15:34,878 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-02-19 19:15:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:34,878 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-02-19 19:15:34,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-02-19 19:15:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-02-19 19:15:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:15:34,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:34,879 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:35,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:15:35,094 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1535343436, now seen corresponding path program 4 times [2021-02-19 19:15:35,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:35,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492326608] [2021-02-19 19:15:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:35,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492326608] [2021-02-19 19:15:35,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711222517] [2021-02-19 19:15:35,393 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:35,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:15:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:15:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:35,820 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:15:35,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2021-02-19 19:15:35,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:15:35,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:15:35,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2021-02-19 19:15:35,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:35,982 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 19:15:35,983 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.6 percent of original size [2021-02-19 19:15:35,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:15:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-02-19 19:15:36,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:36,015 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:15:36,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-02-19 19:15:36,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:15:36,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:15:36,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:15:36,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:221, output treesize:89 [2021-02-19 19:15:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:36,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:36,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:36,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467625358] [2021-02-19 19:15:36,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:15:36,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:36,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:15:36,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:15:36,248 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-02-19 19:15:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:36,698 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-02-19 19:15:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:15:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 22 [2021-02-19 19:15:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:36,702 INFO L225 Difference]: With dead ends: 425 [2021-02-19 19:15:36,702 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 19:15:36,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:15:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 19:15:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-02-19 19:15:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-02-19 19:15:36,713 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-02-19 19:15:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:36,713 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-02-19 19:15:36,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-02-19 19:15:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-02-19 19:15:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:36,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:36,719 INFO L506 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] [2021-02-19 19:15:36,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:36,942 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1950936974, now seen corresponding path program 5 times [2021-02-19 19:15:36,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:36,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301893445] [2021-02-19 19:15:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:36,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301893445] [2021-02-19 19:15:36,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771192277] [2021-02-19 19:15:36,992 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 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 [2021-02-19 19:15:37,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:15:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:37,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:37,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:37,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:37,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:15:37,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392121054] [2021-02-19 19:15:37,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:15:37,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:15:37,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:37,121 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-02-19 19:15:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:37,595 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-02-19 19:15:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:15:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-02-19 19:15:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:37,601 INFO L225 Difference]: With dead ends: 619 [2021-02-19 19:15:37,601 INFO L226 Difference]: Without dead ends: 619 [2021-02-19 19:15:37,601 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:15:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-19 19:15:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-02-19 19:15:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 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) [2021-02-19 19:15:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-02-19 19:15:37,631 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-02-19 19:15:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:37,633 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-02-19 19:15:37,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-02-19 19:15:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-02-19 19:15:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:37,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:37,635 INFO L506 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] [2021-02-19 19:15:37,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 19:15:37,846 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:37,847 INFO L82 PathProgramCache]: Analyzing trace with hash 974618130, now seen corresponding path program 6 times [2021-02-19 19:15:37,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:37,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515101101] [2021-02-19 19:15:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:37,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515101101] [2021-02-19 19:15:37,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453027260] [2021-02-19 19:15:37,908 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 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 [2021-02-19 19:15:37,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:15:37,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:37,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:38,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:38,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178988349] [2021-02-19 19:15:38,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:38,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:38,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:38,068 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:38,974 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-02-19 19:15:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:15:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-02-19 19:15:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:38,981 INFO L225 Difference]: With dead ends: 1078 [2021-02-19 19:15:38,981 INFO L226 Difference]: Without dead ends: 1078 [2021-02-19 19:15:38,982 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:15:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-02-19 19:15:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-02-19 19:15:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-02-19 19:15:38,998 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-02-19 19:15:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:38,999 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-02-19 19:15:38,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-02-19 19:15:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:39,003 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:39,003 INFO L506 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] [2021-02-19 19:15:39,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:39,218 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1791444522, now seen corresponding path program 7 times [2021-02-19 19:15:39,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:39,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422632797] [2021-02-19 19:15:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:39,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422632797] [2021-02-19 19:15:39,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116561295] [2021-02-19 19:15:39,265 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 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 [2021-02-19 19:15:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:39,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:39,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849918859] [2021-02-19 19:15:39,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:39,413 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:40,202 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-02-19 19:15:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:15:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-02-19 19:15:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:40,208 INFO L225 Difference]: With dead ends: 951 [2021-02-19 19:15:40,208 INFO L226 Difference]: Without dead ends: 951 [2021-02-19 19:15:40,209 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:15:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-02-19 19:15:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-02-19 19:15:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-02-19 19:15:40,227 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-02-19 19:15:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:40,227 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-02-19 19:15:40,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-02-19 19:15:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:40,228 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:40,229 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:40,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 19:15:40,452 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1817258414, now seen corresponding path program 1 times [2021-02-19 19:15:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:40,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574042463] [2021-02-19 19:15:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:40,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574042463] [2021-02-19 19:15:40,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21347900] [2021-02-19 19:15:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:15:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:40,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:40,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:15:40,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550973159] [2021-02-19 19:15:40,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:15:40,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:40,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:15:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:15:40,584 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:40,718 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-02-19 19:15:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:15:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:40,722 INFO L225 Difference]: With dead ends: 669 [2021-02-19 19:15:40,723 INFO L226 Difference]: Without dead ends: 663 [2021-02-19 19:15:40,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-02-19 19:15:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-02-19 19:15:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-02-19 19:15:40,739 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-02-19 19:15:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:40,739 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-02-19 19:15:40,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:40,740 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-02-19 19:15:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:40,741 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:40,741 INFO L506 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] [2021-02-19 19:15:40,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 19:15:40,965 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2040740174, now seen corresponding path program 8 times [2021-02-19 19:15:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:40,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462089446] [2021-02-19 19:15:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:41,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462089446] [2021-02-19 19:15:41,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127495507] [2021-02-19 19:15:41,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:41,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:41,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:41,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:41,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:41,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:15:41,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582055309] [2021-02-19 19:15:41,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:41,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:41,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:41,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:41,128 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-02-19 19:15:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:41,319 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-02-19 19:15:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:15:41,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-02-19 19:15:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:41,324 INFO L225 Difference]: With dead ends: 710 [2021-02-19 19:15:41,324 INFO L226 Difference]: Without dead ends: 672 [2021-02-19 19:15:41,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:15:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-02-19 19:15:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-02-19 19:15:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-02-19 19:15:41,341 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-02-19 19:15:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:41,341 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-02-19 19:15:41,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-02-19 19:15:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-02-19 19:15:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:41,343 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:41,343 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:41,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:41,558 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:41,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1334782842, now seen corresponding path program 2 times [2021-02-19 19:15:41,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:41,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708069576] [2021-02-19 19:15:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:41,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708069576] [2021-02-19 19:15:41,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046791721] [2021-02-19 19:15:41,611 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 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 [2021-02-19 19:15:41,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:15:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:41,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:41,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:15:41,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950955820] [2021-02-19 19:15:41,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:15:41,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:41,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:15:41,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:15:41,719 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:41,834 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-02-19 19:15:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:15:41,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:41,839 INFO L225 Difference]: With dead ends: 830 [2021-02-19 19:15:41,839 INFO L226 Difference]: Without dead ends: 830 [2021-02-19 19:15:41,840 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-02-19 19:15:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-02-19 19:15:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-02-19 19:15:41,858 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-02-19 19:15:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:41,858 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-02-19 19:15:41,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-02-19 19:15:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:41,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:41,860 INFO L506 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] [2021-02-19 19:15:42,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:42,084 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:42,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash -11898724, now seen corresponding path program 9 times [2021-02-19 19:15:42,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:42,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466489291] [2021-02-19 19:15:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:42,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466489291] [2021-02-19 19:15:42,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984322198] [2021-02-19 19:15:42,130 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 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 [2021-02-19 19:15:42,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:15:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:42,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:42,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:15:42,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619614443] [2021-02-19 19:15:42,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:15:42,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:15:42,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:15:42,245 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:15:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:42,586 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-02-19 19:15:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:15:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:42,592 INFO L225 Difference]: With dead ends: 1196 [2021-02-19 19:15:42,592 INFO L226 Difference]: Without dead ends: 1196 [2021-02-19 19:15:42,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:15:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-02-19 19:15:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-02-19 19:15:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-02-19 19:15:42,611 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-02-19 19:15:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:42,611 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-02-19 19:15:42,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:15:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-02-19 19:15:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:42,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:42,612 INFO L506 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] [2021-02-19 19:15:42,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-02-19 19:15:42,834 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash 773015370, now seen corresponding path program 10 times [2021-02-19 19:15:42,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:42,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352173035] [2021-02-19 19:15:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:42,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352173035] [2021-02-19 19:15:42,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80487272] [2021-02-19 19:15:42,887 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 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 [2021-02-19 19:15:42,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:15:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:42,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:43,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:43,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:15:43,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5461344] [2021-02-19 19:15:43,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:15:43,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:15:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:15:43,017 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:15:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:43,528 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-02-19 19:15:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:15:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:43,536 INFO L225 Difference]: With dead ends: 1492 [2021-02-19 19:15:43,536 INFO L226 Difference]: Without dead ends: 1492 [2021-02-19 19:15:43,536 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:15:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-02-19 19:15:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-02-19 19:15:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-02-19 19:15:43,567 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-02-19 19:15:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:43,567 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-02-19 19:15:43,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:15:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-02-19 19:15:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:43,569 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:43,569 INFO L506 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] [2021-02-19 19:15:43,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:43,792 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash -310007286, now seen corresponding path program 11 times [2021-02-19 19:15:43,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:43,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797252043] [2021-02-19 19:15:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:43,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797252043] [2021-02-19 19:15:43,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094964932] [2021-02-19 19:15:43,838 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 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 [2021-02-19 19:15:43,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:43,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:43,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:43,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:15:43,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116634532] [2021-02-19 19:15:43,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:43,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:43,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:43,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:43,970 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-02-19 19:15:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:44,236 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-02-19 19:15:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:15:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-02-19 19:15:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:44,243 INFO L225 Difference]: With dead ends: 1258 [2021-02-19 19:15:44,243 INFO L226 Difference]: Without dead ends: 1248 [2021-02-19 19:15:44,243 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:15:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-02-19 19:15:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-02-19 19:15:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-02-19 19:15:44,271 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-02-19 19:15:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:44,271 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-02-19 19:15:44,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-02-19 19:15:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-02-19 19:15:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:44,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:44,273 INFO L506 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] [2021-02-19 19:15:44,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-02-19 19:15:44,496 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1161070832, now seen corresponding path program 12 times [2021-02-19 19:15:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:44,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685667320] [2021-02-19 19:15:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:44,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685667320] [2021-02-19 19:15:44,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492919404] [2021-02-19 19:15:44,547 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 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 [2021-02-19 19:15:44,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:15:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:44,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:44,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:44,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:15:44,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291381042] [2021-02-19 19:15:44,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:44,673 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-02-19 19:15:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:44,957 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-02-19 19:15:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:15:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-02-19 19:15:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:44,963 INFO L225 Difference]: With dead ends: 1329 [2021-02-19 19:15:44,963 INFO L226 Difference]: Without dead ends: 1329 [2021-02-19 19:15:44,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:15:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-02-19 19:15:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-02-19 19:15:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-02-19 19:15:44,989 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-02-19 19:15:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:44,990 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-02-19 19:15:44,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-02-19 19:15:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-02-19 19:15:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:44,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:44,992 INFO L506 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] [2021-02-19 19:15:45,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:45,206 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1719135114, now seen corresponding path program 13 times [2021-02-19 19:15:45,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348644063] [2021-02-19 19:15:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348644063] [2021-02-19 19:15:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755700978] [2021-02-19 19:15:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:15:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:45,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:45,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:15:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564812298] [2021-02-19 19:15:45,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:15:45,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:15:45,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:15:45,347 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:15:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:45,723 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-02-19 19:15:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:15:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:45,730 INFO L225 Difference]: With dead ends: 1548 [2021-02-19 19:15:45,730 INFO L226 Difference]: Without dead ends: 1544 [2021-02-19 19:15:45,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:15:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-02-19 19:15:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-02-19 19:15:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-02-19 19:15:45,758 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-02-19 19:15:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:45,758 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-02-19 19:15:45,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:15:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-02-19 19:15:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:45,760 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:45,760 INFO L506 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] [2021-02-19 19:15:45,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 19:15:45,979 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash 456185038, now seen corresponding path program 14 times [2021-02-19 19:15:45,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:45,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325537667] [2021-02-19 19:15:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:46,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325537667] [2021-02-19 19:15:46,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530784076] [2021-02-19 19:15:46,050 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 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 [2021-02-19 19:15:46,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:46,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:46,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630204837] [2021-02-19 19:15:46,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:46,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:46,202 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:47,021 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-02-19 19:15:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:15:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-02-19 19:15:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:47,035 INFO L225 Difference]: With dead ends: 2734 [2021-02-19 19:15:47,035 INFO L226 Difference]: Without dead ends: 2734 [2021-02-19 19:15:47,036 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:15:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-02-19 19:15:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-02-19 19:15:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-02-19 19:15:47,073 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-02-19 19:15:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:47,074 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-02-19 19:15:47,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-02-19 19:15:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:47,076 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:47,076 INFO L506 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] [2021-02-19 19:15:47,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:47,300 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1985089682, now seen corresponding path program 15 times [2021-02-19 19:15:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:47,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49869015] [2021-02-19 19:15:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:47,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49869015] [2021-02-19 19:15:47,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365845252] [2021-02-19 19:15:47,343 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 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 [2021-02-19 19:15:47,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:15:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:47,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:47,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:47,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:47,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:47,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491250699] [2021-02-19 19:15:47,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:47,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:47,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:47,491 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:48,225 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-02-19 19:15:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:15:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-02-19 19:15:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:48,234 INFO L225 Difference]: With dead ends: 2693 [2021-02-19 19:15:48,235 INFO L226 Difference]: Without dead ends: 2693 [2021-02-19 19:15:48,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:15:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-02-19 19:15:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-02-19 19:15:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-02-19 19:15:48,273 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-02-19 19:15:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:48,273 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-02-19 19:15:48,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-02-19 19:15:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:48,276 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:48,276 INFO L506 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] [2021-02-19 19:15:48,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 19:15:48,490 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash -149208740, now seen corresponding path program 16 times [2021-02-19 19:15:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:48,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209571234] [2021-02-19 19:15:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209571234] [2021-02-19 19:15:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714197364] [2021-02-19 19:15:48,537 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 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 [2021-02-19 19:15:48,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:15:48,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:48,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:48,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:48,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:48,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:15:48,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405768746] [2021-02-19 19:15:48,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:15:48,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:48,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:15:48,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:48,673 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:49,463 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-02-19 19:15:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:15:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:49,471 INFO L225 Difference]: With dead ends: 2677 [2021-02-19 19:15:49,471 INFO L226 Difference]: Without dead ends: 2677 [2021-02-19 19:15:49,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:15:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-02-19 19:15:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-02-19 19:15:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-02-19 19:15:49,511 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-02-19 19:15:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:49,511 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-02-19 19:15:49,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-02-19 19:15:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:49,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:49,513 INFO L506 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] [2021-02-19 19:15:49,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 19:15:49,734 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:49,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:49,734 INFO L82 PathProgramCache]: Analyzing trace with hash 923108234, now seen corresponding path program 17 times [2021-02-19 19:15:49,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:49,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257028095] [2021-02-19 19:15:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:49,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257028095] [2021-02-19 19:15:49,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366059276] [2021-02-19 19:15:49,787 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 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 [2021-02-19 19:15:49,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:15:49,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:49,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:49,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:15:49,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333435451] [2021-02-19 19:15:49,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:15:49,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:49,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:15:49,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:49,900 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:50,499 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-02-19 19:15:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:15:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:50,505 INFO L225 Difference]: With dead ends: 2474 [2021-02-19 19:15:50,505 INFO L226 Difference]: Without dead ends: 2470 [2021-02-19 19:15:50,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:15:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-02-19 19:15:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-02-19 19:15:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-02-19 19:15:50,544 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-02-19 19:15:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:50,544 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-02-19 19:15:50,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-02-19 19:15:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:50,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:50,547 INFO L506 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] [2021-02-19 19:15:50,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:50,770 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1082709490, now seen corresponding path program 18 times [2021-02-19 19:15:50,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:50,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768071302] [2021-02-19 19:15:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:50,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768071302] [2021-02-19 19:15:50,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486108558] [2021-02-19 19:15:50,828 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 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 [2021-02-19 19:15:50,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:15:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:50,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:50,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:50,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:50,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877288558] [2021-02-19 19:15:50,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:50,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:50,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:50,966 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:15:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:51,774 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-02-19 19:15:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:15:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-02-19 19:15:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:51,782 INFO L225 Difference]: With dead ends: 2514 [2021-02-19 19:15:51,782 INFO L226 Difference]: Without dead ends: 2514 [2021-02-19 19:15:51,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:15:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-02-19 19:15:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-02-19 19:15:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-02-19 19:15:51,834 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-02-19 19:15:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:51,834 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-02-19 19:15:51,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:15:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-02-19 19:15:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:51,836 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:51,836 INFO L506 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] [2021-02-19 19:15:52,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-02-19 19:15:52,050 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2138086884, now seen corresponding path program 19 times [2021-02-19 19:15:52,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:52,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518637925] [2021-02-19 19:15:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518637925] [2021-02-19 19:15:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344553751] [2021-02-19 19:15:52,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:15:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:52,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:52,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:52,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:52,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632683289] [2021-02-19 19:15:52,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:52,230 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:15:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:52,903 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-02-19 19:15:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:15:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-02-19 19:15:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:52,910 INFO L225 Difference]: With dead ends: 2332 [2021-02-19 19:15:52,910 INFO L226 Difference]: Without dead ends: 2328 [2021-02-19 19:15:52,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:15:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-02-19 19:15:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-02-19 19:15:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-02-19 19:15:52,945 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-02-19 19:15:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:52,945 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-02-19 19:15:52,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:15:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-02-19 19:15:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:52,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:52,948 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:15:53,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:53,162 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1593578166, now seen corresponding path program 3 times [2021-02-19 19:15:53,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:53,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528200567] [2021-02-19 19:15:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528200567] [2021-02-19 19:15:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154199632] [2021-02-19 19:15:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:53,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:15:53,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:15:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:53,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:53,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:15:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054355278] [2021-02-19 19:15:53,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:15:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:15:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:15:53,286 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:53,369 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-02-19 19:15:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:15:53,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:53,372 INFO L225 Difference]: With dead ends: 929 [2021-02-19 19:15:53,372 INFO L226 Difference]: Without dead ends: 929 [2021-02-19 19:15:53,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-02-19 19:15:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-02-19 19:15:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-02-19 19:15:53,391 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-02-19 19:15:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:53,392 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-02-19 19:15:53,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-02-19 19:15:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:53,394 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:53,394 INFO L506 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] [2021-02-19 19:15:53,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:53,610 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1771189386, now seen corresponding path program 20 times [2021-02-19 19:15:53,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:53,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528554944] [2021-02-19 19:15:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:53,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528554944] [2021-02-19 19:15:53,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766527028] [2021-02-19 19:15:53,652 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) [2021-02-19 19:15:53,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:53,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:53,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:15:53,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286949663] [2021-02-19 19:15:53,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:15:53,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:15:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:15:53,761 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:15:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:54,072 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-02-19 19:15:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:15:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-02-19 19:15:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:54,077 INFO L225 Difference]: With dead ends: 1555 [2021-02-19 19:15:54,077 INFO L226 Difference]: Without dead ends: 1555 [2021-02-19 19:15:54,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:15:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-02-19 19:15:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-02-19 19:15:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-02-19 19:15:54,105 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-02-19 19:15:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:54,105 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-02-19 19:15:54,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:15:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-02-19 19:15:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:54,108 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:54,108 INFO L506 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] [2021-02-19 19:15:54,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 19:15:54,331 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash 131490066, now seen corresponding path program 21 times [2021-02-19 19:15:54,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:54,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665818309] [2021-02-19 19:15:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665818309] [2021-02-19 19:15:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859569490] [2021-02-19 19:15:54,367 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 [2021-02-19 19:15:54,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:15:54,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:54,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:54,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:15:54,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606002417] [2021-02-19 19:15:54,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:15:54,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:54,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:15:54,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:15:54,479 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:15:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:54,815 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-02-19 19:15:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:15:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-02-19 19:15:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:54,819 INFO L225 Difference]: With dead ends: 1605 [2021-02-19 19:15:54,819 INFO L226 Difference]: Without dead ends: 1605 [2021-02-19 19:15:54,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:15:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-02-19 19:15:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-02-19 19:15:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-02-19 19:15:54,855 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-02-19 19:15:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:54,855 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-02-19 19:15:54,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:15:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-02-19 19:15:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:54,859 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:54,859 INFO L506 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] [2021-02-19 19:15:55,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:55,083 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1077609810, now seen corresponding path program 22 times [2021-02-19 19:15:55,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:55,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827878238] [2021-02-19 19:15:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:55,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827878238] [2021-02-19 19:15:55,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526616561] [2021-02-19 19:15:55,115 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 [2021-02-19 19:15:55,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:15:55,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:55,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:15:55,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:55,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:15:55,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700778645] [2021-02-19 19:15:55,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:15:55,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:15:55,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:15:55,178 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:15:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:55,369 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-02-19 19:15:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:15:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-02-19 19:15:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:55,373 INFO L225 Difference]: With dead ends: 1524 [2021-02-19 19:15:55,374 INFO L226 Difference]: Without dead ends: 1520 [2021-02-19 19:15:55,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:15:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-02-19 19:15:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-02-19 19:15:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-02-19 19:15:55,399 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-02-19 19:15:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:55,400 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-02-19 19:15:55,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:15:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-02-19 19:15:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:55,402 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:55,402 INFO L506 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] [2021-02-19 19:15:55,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-02-19 19:15:55,618 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash 155907670, now seen corresponding path program 23 times [2021-02-19 19:15:55,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:55,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431391786] [2021-02-19 19:15:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:55,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431391786] [2021-02-19 19:15:55,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397081098] [2021-02-19 19:15:55,659 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 [2021-02-19 19:15:55,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:15:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:55,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:55,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:55,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:15:55,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012827411] [2021-02-19 19:15:55,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:15:55,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:55,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:15:55,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:15:55,750 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:15:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:56,017 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-02-19 19:15:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:15:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-02-19 19:15:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:56,022 INFO L225 Difference]: With dead ends: 1508 [2021-02-19 19:15:56,022 INFO L226 Difference]: Without dead ends: 1496 [2021-02-19 19:15:56,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:15:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-02-19 19:15:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-02-19 19:15:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-02-19 19:15:56,048 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-02-19 19:15:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:56,048 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-02-19 19:15:56,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:15:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-02-19 19:15:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:56,051 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:56,051 INFO L506 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] [2021-02-19 19:15:56,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 19:15:56,266 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:56,266 INFO L82 PathProgramCache]: Analyzing trace with hash 157585298, now seen corresponding path program 24 times [2021-02-19 19:15:56,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:56,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309211827] [2021-02-19 19:15:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309211827] [2021-02-19 19:15:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526868072] [2021-02-19 19:15:56,310 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 [2021-02-19 19:15:56,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:15:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:56,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:56,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:56,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366882241] [2021-02-19 19:15:56,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:56,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:56,427 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:57,088 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-02-19 19:15:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:15:57,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-02-19 19:15:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:57,094 INFO L225 Difference]: With dead ends: 2412 [2021-02-19 19:15:57,094 INFO L226 Difference]: Without dead ends: 2412 [2021-02-19 19:15:57,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:15:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-02-19 19:15:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-02-19 19:15:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-02-19 19:15:57,127 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-02-19 19:15:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:57,127 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-02-19 19:15:57,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-02-19 19:15:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:57,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:57,130 INFO L506 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] [2021-02-19 19:15:57,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 19:15:57,343 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:57,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1686489942, now seen corresponding path program 25 times [2021-02-19 19:15:57,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:57,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782079492] [2021-02-19 19:15:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:57,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782079492] [2021-02-19 19:15:57,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112158225] [2021-02-19 19:15:57,387 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 [2021-02-19 19:15:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:57,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:57,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:57,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:57,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:15:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554713579] [2021-02-19 19:15:57,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:15:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:15:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:15:57,513 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:58,032 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-02-19 19:15:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:15:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-02-19 19:15:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:58,038 INFO L225 Difference]: With dead ends: 2335 [2021-02-19 19:15:58,038 INFO L226 Difference]: Without dead ends: 2335 [2021-02-19 19:15:58,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:15:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-02-19 19:15:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-02-19 19:15:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:15:58,072 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:15:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:58,072 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:15:58,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-02-19 19:15:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:15:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:58,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:58,074 INFO L506 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] [2021-02-19 19:15:58,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 19:15:58,291 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:58,292 INFO L82 PathProgramCache]: Analyzing trace with hash -447808480, now seen corresponding path program 26 times [2021-02-19 19:15:58,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:58,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080683182] [2021-02-19 19:15:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080683182] [2021-02-19 19:15:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877149834] [2021-02-19 19:15:58,329 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 [2021-02-19 19:15:58,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:15:58,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:58,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:58,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:15:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088168877] [2021-02-19 19:15:58,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:15:58,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:15:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:58,423 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:58,855 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-02-19 19:15:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:15:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:58,859 INFO L225 Difference]: With dead ends: 2285 [2021-02-19 19:15:58,860 INFO L226 Difference]: Without dead ends: 2285 [2021-02-19 19:15:58,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:15:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-02-19 19:15:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-02-19 19:15:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-02-19 19:15:58,891 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-02-19 19:15:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:58,891 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-02-19 19:15:58,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-02-19 19:15:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:58,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:58,893 INFO L506 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] [2021-02-19 19:15:59,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:15:59,117 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:15:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:15:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash 624508494, now seen corresponding path program 27 times [2021-02-19 19:15:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:15:59,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637332999] [2021-02-19 19:15:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:15:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:15:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637332999] [2021-02-19 19:15:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944842758] [2021-02-19 19:15:59,160 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 [2021-02-19 19:15:59,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:15:59,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:15:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:15:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:15:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:15:59,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:15:59,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:15:59,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988326872] [2021-02-19 19:15:59,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:15:59,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:15:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:15:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:15:59,261 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:15:59,764 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-02-19 19:15:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:15:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:15:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:15:59,770 INFO L225 Difference]: With dead ends: 2176 [2021-02-19 19:15:59,770 INFO L226 Difference]: Without dead ends: 2172 [2021-02-19 19:15:59,770 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:15:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-02-19 19:15:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-02-19 19:15:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:15:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:15:59,796 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:15:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:15:59,796 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:15:59,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:15:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:15:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:15:59,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:15:59,798 INFO L506 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] [2021-02-19 19:16:00,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:00,022 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1381309230, now seen corresponding path program 28 times [2021-02-19 19:16:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:00,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671632261] [2021-02-19 19:16:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671632261] [2021-02-19 19:16:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98880617] [2021-02-19 19:16:00,067 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 [2021-02-19 19:16:00,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:16:00,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:00,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:00,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:00,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:16:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228215173] [2021-02-19 19:16:00,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:16:00,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:00,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:16:00,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:16:00,209 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:00,685 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-02-19 19:16:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:16:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-02-19 19:16:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:00,689 INFO L225 Difference]: With dead ends: 2199 [2021-02-19 19:16:00,690 INFO L226 Difference]: Without dead ends: 2199 [2021-02-19 19:16:00,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:16:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-02-19 19:16:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-02-19 19:16:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-02-19 19:16:00,715 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-02-19 19:16:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:00,715 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-02-19 19:16:00,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-02-19 19:16:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:00,717 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:00,717 INFO L506 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] [2021-02-19 19:16:00,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:00,918 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1858280672, now seen corresponding path program 29 times [2021-02-19 19:16:00,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:00,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454700355] [2021-02-19 19:16:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:00,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454700355] [2021-02-19 19:16:00,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753416595] [2021-02-19 19:16:00,964 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 [2021-02-19 19:16:00,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:16:00,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:00,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:01,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:01,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:01,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:16:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898244979] [2021-02-19 19:16:01,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:16:01,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:16:01,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:16:01,092 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:01,503 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-02-19 19:16:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:16:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-02-19 19:16:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:01,507 INFO L225 Difference]: With dead ends: 2156 [2021-02-19 19:16:01,507 INFO L226 Difference]: Without dead ends: 2152 [2021-02-19 19:16:01,508 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:16:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-02-19 19:16:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-02-19 19:16:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:16:01,539 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:16:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:01,539 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:16:01,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:16:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:01,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:01,542 INFO L506 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] [2021-02-19 19:16:01,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-02-19 19:16:01,758 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1084275334, now seen corresponding path program 30 times [2021-02-19 19:16:01,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:01,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806576631] [2021-02-19 19:16:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:01,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806576631] [2021-02-19 19:16:01,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326327141] [2021-02-19 19:16:01,802 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 [2021-02-19 19:16:01,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:16:01,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:01,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:01,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:16:01,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415460017] [2021-02-19 19:16:01,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:16:01,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:01,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:16:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:16:01,910 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:16:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:02,305 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-02-19 19:16:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:16:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-02-19 19:16:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:02,308 INFO L225 Difference]: With dead ends: 2097 [2021-02-19 19:16:02,309 INFO L226 Difference]: Without dead ends: 2097 [2021-02-19 19:16:02,309 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:16:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-02-19 19:16:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-02-19 19:16:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-02-19 19:16:02,331 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-02-19 19:16:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:02,331 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-02-19 19:16:02,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:16:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-02-19 19:16:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:02,333 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:02,333 INFO L506 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] [2021-02-19 19:16:02,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:02,534 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash -11958360, now seen corresponding path program 31 times [2021-02-19 19:16:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:02,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31242882] [2021-02-19 19:16:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:02,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31242882] [2021-02-19 19:16:02,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586439814] [2021-02-19 19:16:02,580 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 [2021-02-19 19:16:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:02,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:02,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:16:02,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707136352] [2021-02-19 19:16:02,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:16:02,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:16:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:16:02,664 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:16:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:02,974 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-02-19 19:16:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:16:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-02-19 19:16:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:02,978 INFO L225 Difference]: With dead ends: 1963 [2021-02-19 19:16:02,978 INFO L226 Difference]: Without dead ends: 1959 [2021-02-19 19:16:02,978 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:16:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-02-19 19:16:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-02-19 19:16:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-02-19 19:16:03,006 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-02-19 19:16:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:03,006 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-02-19 19:16:03,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:16:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-02-19 19:16:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:03,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:03,009 INFO L506 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] [2021-02-19 19:16:03,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-02-19 19:16:03,232 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1248878166, now seen corresponding path program 32 times [2021-02-19 19:16:03,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:03,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940158513] [2021-02-19 19:16:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:03,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940158513] [2021-02-19 19:16:03,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731768802] [2021-02-19 19:16:03,272 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 [2021-02-19 19:16:03,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:16:03,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:03,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:03,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:16:03,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659502899] [2021-02-19 19:16:03,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:16:03,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:03,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:16:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:16:03,344 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:16:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:03,565 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-02-19 19:16:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:16:03,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-02-19 19:16:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:03,569 INFO L225 Difference]: With dead ends: 1728 [2021-02-19 19:16:03,569 INFO L226 Difference]: Without dead ends: 1716 [2021-02-19 19:16:03,569 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:16:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-02-19 19:16:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-02-19 19:16:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-02-19 19:16:03,589 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-02-19 19:16:03,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:03,589 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-02-19 19:16:03,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:16:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-02-19 19:16:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:03,591 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:03,591 INFO L506 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] [2021-02-19 19:16:03,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:03,799 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1921164502, now seen corresponding path program 33 times [2021-02-19 19:16:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:03,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362079453] [2021-02-19 19:16:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:03,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362079453] [2021-02-19 19:16:03,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293708980] [2021-02-19 19:16:03,859 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 [2021-02-19 19:16:03,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:16:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:03,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:03,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:16:03,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414198919] [2021-02-19 19:16:03,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:16:03,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:03,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:16:03,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:16:03,963 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:04,363 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-02-19 19:16:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:16:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-02-19 19:16:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:04,367 INFO L225 Difference]: With dead ends: 1821 [2021-02-19 19:16:04,367 INFO L226 Difference]: Without dead ends: 1821 [2021-02-19 19:16:04,368 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:16:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-02-19 19:16:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-02-19 19:16:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-02-19 19:16:04,396 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-02-19 19:16:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:04,396 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-02-19 19:16:04,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-02-19 19:16:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:04,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:04,399 INFO L506 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] [2021-02-19 19:16:04,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 19:16:04,621 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 865787108, now seen corresponding path program 34 times [2021-02-19 19:16:04,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:04,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540791535] [2021-02-19 19:16:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:04,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540791535] [2021-02-19 19:16:04,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139115884] [2021-02-19 19:16:04,688 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) [2021-02-19 19:16:04,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:16:04,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:04,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:04,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:16:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353988740] [2021-02-19 19:16:04,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:16:04,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:16:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:16:04,815 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:05,168 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-02-19 19:16:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:16:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-02-19 19:16:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:05,172 INFO L225 Difference]: With dead ends: 1790 [2021-02-19 19:16:05,172 INFO L226 Difference]: Without dead ends: 1786 [2021-02-19 19:16:05,172 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:16:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-02-19 19:16:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-02-19 19:16:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-02-19 19:16:05,193 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-02-19 19:16:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:05,193 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-02-19 19:16:05,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-02-19 19:16:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-02-19 19:16:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:16:05,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:05,195 INFO L506 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] [2021-02-19 19:16:05,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 19:16:05,396 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1946045250, now seen corresponding path program 35 times [2021-02-19 19:16:05,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:05,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396028160] [2021-02-19 19:16:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:05,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396028160] [2021-02-19 19:16:05,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865787059] [2021-02-19 19:16:05,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:16:05,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:16:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:16:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:05,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:05,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:16:05,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778418859] [2021-02-19 19:16:05,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:16:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:16:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:16:05,568 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:05,770 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-02-19 19:16:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:16:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:16:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:05,773 INFO L225 Difference]: With dead ends: 1649 [2021-02-19 19:16:05,773 INFO L226 Difference]: Without dead ends: 1637 [2021-02-19 19:16:05,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:16:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-02-19 19:16:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-02-19 19:16:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-02-19 19:16:05,793 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-02-19 19:16:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:05,793 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-02-19 19:16:05,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-02-19 19:16:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:16:05,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:05,796 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:16:06,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 19:16:06,010 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1756299952, now seen corresponding path program 4 times [2021-02-19 19:16:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:06,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594417080] [2021-02-19 19:16:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:06,346 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 19:16:06,518 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 19:16:06,668 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 19:16:06,824 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 19:16:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:06,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594417080] [2021-02-19 19:16:06,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30982685] [2021-02-19 19:16:06,943 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 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 [2021-02-19 19:16:06,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:16:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:16:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:07,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-02-19 19:16:07,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-02-19 19:16:07,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,633 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 35 treesize of output 21 [2021-02-19 19:16:07,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,646 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 30 treesize of output 18 [2021-02-19 19:16:07,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,657 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 31 treesize of output 16 [2021-02-19 19:16:07,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,669 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 39 treesize of output 23 [2021-02-19 19:16:07,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,681 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 36 treesize of output 22 [2021-02-19 19:16:07,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,692 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 44 treesize of output 26 [2021-02-19 19:16:07,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,703 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 21 treesize of output 10 [2021-02-19 19:16:07,705 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,717 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 35 treesize of output 21 [2021-02-19 19:16:07,718 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,729 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 41 treesize of output 22 [2021-02-19 19:16:07,730 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,741 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 44 treesize of output 26 [2021-02-19 19:16:07,743 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,753 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 30 treesize of output 18 [2021-02-19 19:16:07,754 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,764 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 36 treesize of output 22 [2021-02-19 19:16:07,765 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,776 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 31 treesize of output 16 [2021-02-19 19:16:07,778 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:07,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:16:07,787 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:07,882 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-02-19 19:16:07,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:16:07,885 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-02-19 19:16:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:07,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:07,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:16:07,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026271751] [2021-02-19 19:16:07,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:16:07,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:16:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:16:07,957 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:16:08,775 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-02-19 19:16:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:09,182 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-02-19 19:16:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:16:09,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:16:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:09,186 INFO L225 Difference]: With dead ends: 1517 [2021-02-19 19:16:09,186 INFO L226 Difference]: Without dead ends: 1502 [2021-02-19 19:16:09,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:16:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-02-19 19:16:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-02-19 19:16:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-02-19 19:16:09,204 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-02-19 19:16:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:09,204 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-02-19 19:16:09,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:16:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-02-19 19:16:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:16:09,206 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:09,206 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:16:09,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:09,407 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -272098064, now seen corresponding path program 5 times [2021-02-19 19:16:09,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:09,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826650944] [2021-02-19 19:16:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:09,803 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-02-19 19:16:09,941 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 19:16:10,110 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 19:16:10,275 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 19:16:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:10,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826650944] [2021-02-19 19:16:10,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547655343] [2021-02-19 19:16:10,431 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 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 [2021-02-19 19:16:10,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:16:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:10,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:16:10,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:11,236 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 19:16:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:11,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:11,393 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-02-19 19:16:11,393 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 63 [2021-02-19 19:16:11,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:11,417 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-02-19 19:16:11,418 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-02-19 19:16:11,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:11,677 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-02-19 19:16:11,677 INFO L628 ElimStorePlain]: treesize reduction 409, result has 40.6 percent of original size [2021-02-19 19:16:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:11,702 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-02-19 19:16:11,703 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 52 [2021-02-19 19:16:11,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:11,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:11,805 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-02-19 19:16:11,806 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-02-19 19:16:11,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:11,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:11,895 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-02-19 19:16:11,896 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-02-19 19:16:11,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:11,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:11,975 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-02-19 19:16:11,976 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-02-19 19:16:11,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:12,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:12,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:16:12,039 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:875, output treesize:72 [2021-02-19 19:16:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:12,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:12,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:16:12,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048059714] [2021-02-19 19:16:12,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:16:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:16:12,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:16:12,169 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:16:12,394 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-02-19 19:16:12,571 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-02-19 19:16:13,037 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 19:16:13,495 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-02-19 19:16:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:13,574 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-02-19 19:16:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:16:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:16:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:13,577 INFO L225 Difference]: With dead ends: 1495 [2021-02-19 19:16:13,577 INFO L226 Difference]: Without dead ends: 1480 [2021-02-19 19:16:13,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:16:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-02-19 19:16:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-02-19 19:16:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-02-19 19:16:13,597 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-02-19 19:16:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:13,598 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-02-19 19:16:13,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:16:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-02-19 19:16:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:16:13,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:13,601 INFO L506 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] [2021-02-19 19:16:13,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:13,826 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1319331244, now seen corresponding path program 36 times [2021-02-19 19:16:13,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:13,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548529341] [2021-02-19 19:16:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:14,369 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-02-19 19:16:14,501 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 19:16:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548529341] [2021-02-19 19:16:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810662145] [2021-02-19 19:16:14,627 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 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 [2021-02-19 19:16:14,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:16:14,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:16:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:15,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-02-19 19:16:15,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,633 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 39 treesize of output 18 [2021-02-19 19:16:15,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,650 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 43 treesize of output 23 [2021-02-19 19:16:15,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,666 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 55 treesize of output 24 [2021-02-19 19:16:15,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,684 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 45 treesize of output 23 [2021-02-19 19:16:15,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,705 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 47 treesize of output 25 [2021-02-19 19:16:15,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,724 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 44 treesize of output 18 [2021-02-19 19:16:15,726 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,742 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 53 treesize of output 24 [2021-02-19 19:16:15,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,760 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 56 treesize of output 28 [2021-02-19 19:16:15,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,776 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 40 treesize of output 20 [2021-02-19 19:16:15,777 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-02-19 19:16:15,795 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,811 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 52 treesize of output 28 [2021-02-19 19:16:15,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,827 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 25 [2021-02-19 19:16:15,829 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,843 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 20 [2021-02-19 19:16:15,845 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,865 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 44 treesize of output 14 [2021-02-19 19:16:15,867 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:15,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:15,875 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 39 treesize of output 18 [2021-02-19 19:16:15,876 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:15,938 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-02-19 19:16:15,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:16:15,942 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-02-19 19:16:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:16,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:16,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:16:16,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78317234] [2021-02-19 19:16:16,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:16:16,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:16:16,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:16:16,007 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-02-19 19:16:16,612 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-02-19 19:16:16,882 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2021-02-19 19:16:17,108 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-02-19 19:16:17,559 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-02-19 19:16:17,863 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2021-02-19 19:16:18,024 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 46 [2021-02-19 19:16:18,197 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-02-19 19:16:18,482 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2021-02-19 19:16:18,678 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-02-19 19:16:19,069 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-02-19 19:16:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:19,188 INFO L93 Difference]: Finished difference Result 1649 states and 5318 transitions. [2021-02-19 19:16:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:16:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-02-19 19:16:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:19,191 INFO L225 Difference]: With dead ends: 1649 [2021-02-19 19:16:19,192 INFO L226 Difference]: Without dead ends: 1634 [2021-02-19 19:16:19,192 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:16:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-02-19 19:16:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1180. [2021-02-19 19:16:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-02-19 19:16:19,213 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-02-19 19:16:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:19,213 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-02-19 19:16:19,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-02-19 19:16:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-02-19 19:16:19,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:16:19,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:19,216 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:16:19,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 19:16:19,417 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2124378420, now seen corresponding path program 6 times [2021-02-19 19:16:19,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:19,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788128855] [2021-02-19 19:16:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:19,710 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-02-19 19:16:19,827 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 19:16:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788128855] [2021-02-19 19:16:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541247812] [2021-02-19 19:16:20,199 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 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 [2021-02-19 19:16:20,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:16:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:16:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:16:20,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:16:20,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:20,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-02-19 19:16:20,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-02-19 19:16:20,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:20,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:16:20,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-02-19 19:16:20,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:16:20,707 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,728 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:16:20,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:20,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:16:20,754 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:16:20,774 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:16:20,792 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:16:20,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,828 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:16:20,830 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:16:20,847 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,863 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:16:20,865 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:20,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:16:20,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:16:20,877 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:21,023 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 19:16:21,023 INFO L628 ElimStorePlain]: treesize reduction 54, result has 59.7 percent of original size [2021-02-19 19:16:21,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:16:21,025 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-02-19 19:16:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:21,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:21,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:16:21,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894102318] [2021-02-19 19:16:21,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:16:21,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:16:21,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:16:21,211 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:21,744 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-02-19 19:16:22,016 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-02-19 19:16:22,298 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-02-19 19:16:22,486 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-02-19 19:16:22,728 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-02-19 19:16:23,243 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 19:16:23,491 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-02-19 19:16:23,873 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2021-02-19 19:16:24,082 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-02-19 19:16:24,443 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-02-19 19:16:24,694 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-02-19 19:16:25,299 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-02-19 19:16:25,673 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-02-19 19:16:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:25,855 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-02-19 19:16:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:16:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:16:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:25,859 INFO L225 Difference]: With dead ends: 1843 [2021-02-19 19:16:25,859 INFO L226 Difference]: Without dead ends: 1828 [2021-02-19 19:16:25,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:16:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-02-19 19:16:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-02-19 19:16:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-02-19 19:16:25,882 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-02-19 19:16:25,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:25,882 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-02-19 19:16:25,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-02-19 19:16:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:16:25,884 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:25,884 INFO L506 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] [2021-02-19 19:16:26,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:26,085 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash -620207312, now seen corresponding path program 37 times [2021-02-19 19:16:26,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:26,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775740526] [2021-02-19 19:16:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:26,627 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 19:16:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:26,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775740526] [2021-02-19 19:16:26,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916449144] [2021-02-19 19:16:26,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:16:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:16:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,850 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 34 treesize of output 12 [2021-02-19 19:16:27,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,866 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 44 treesize of output 14 [2021-02-19 19:16:27,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,886 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 53 treesize of output 24 [2021-02-19 19:16:27,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-02-19 19:16:27,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,918 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 43 treesize of output 23 [2021-02-19 19:16:27,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,933 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 55 treesize of output 24 [2021-02-19 19:16:27,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,947 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 47 treesize of output 25 [2021-02-19 19:16:27,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,960 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 20 [2021-02-19 19:16:27,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,972 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 64 treesize of output 24 [2021-02-19 19:16:27,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,985 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 39 treesize of output 18 [2021-02-19 19:16:27,986 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:27,998 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 25 [2021-02-19 19:16:27,999 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,013 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 52 treesize of output 28 [2021-02-19 19:16:28,014 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,024 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 44 treesize of output 18 [2021-02-19 19:16:28,025 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,035 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 45 treesize of output 23 [2021-02-19 19:16:28,035 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,045 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 40 treesize of output 20 [2021-02-19 19:16:28,046 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:16:28,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:16:28,053 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 39 treesize of output 18 [2021-02-19 19:16:28,054 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:28,104 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-02-19 19:16:28,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:16:28,106 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-02-19 19:16:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:28,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:28,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:16:28,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216256104] [2021-02-19 19:16:28,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:16:28,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:28,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:16:28,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:16:28,157 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-02-19 19:16:28,605 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-02-19 19:16:28,981 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-02-19 19:16:29,140 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-02-19 19:16:29,293 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-02-19 19:16:29,590 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 19:16:29,779 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2021-02-19 19:16:29,980 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2021-02-19 19:16:30,160 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-02-19 19:16:30,391 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-02-19 19:16:30,707 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-02-19 19:16:30,914 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-02-19 19:16:31,267 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-02-19 19:16:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:16:31,464 INFO L93 Difference]: Finished difference Result 1805 states and 5771 transitions. [2021-02-19 19:16:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:16:31,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-02-19 19:16:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:16:31,467 INFO L225 Difference]: With dead ends: 1805 [2021-02-19 19:16:31,468 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 19:16:31,468 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:16:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 19:16:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1206. [2021-02-19 19:16:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:16:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-02-19 19:16:31,488 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-02-19 19:16:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:16:31,488 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-02-19 19:16:31,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-02-19 19:16:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-02-19 19:16:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:16:31,490 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:16:31,490 INFO L506 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] [2021-02-19 19:16:31,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:16:31,691 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:16:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:16:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1596526156, now seen corresponding path program 38 times [2021-02-19 19:16:31,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:16:31,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972595511] [2021-02-19 19:16:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:16:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:16:31,959 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 19:16:32,097 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-02-19 19:16:32,409 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-02-19 19:16:32,701 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-02-19 19:16:32,866 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 19:16:33,044 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 19:16:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:33,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972595511] [2021-02-19 19:16:33,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384697476] [2021-02-19 19:16:33,140 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 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 [2021-02-19 19:16:33,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:16:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:16:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 19:16:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:16:33,492 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 19:16:34,120 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 19:16:34,447 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 19:16:35,140 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:16:35,140 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-02-19 19:16:35,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:35,237 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:16:35,238 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-02-19 19:16:35,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:36,898 WARN L202 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 210 DAG size of output: 189 [2021-02-19 19:16:36,899 INFO L628 ElimStorePlain]: treesize reduction 149, result has 87.9 percent of original size [2021-02-19 19:16:37,017 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:16:37,017 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-02-19 19:16:37,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:37,183 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:16:37,183 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-02-19 19:16:37,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:38,973 WARN L202 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 260 DAG size of output: 204 [2021-02-19 19:16:38,974 INFO L628 ElimStorePlain]: treesize reduction 266, result has 80.5 percent of original size [2021-02-19 19:16:39,103 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:16:39,104 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-02-19 19:16:39,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:39,232 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:16:39,232 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-02-19 19:16:39,240 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:40,981 WARN L202 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 208 DAG size of output: 204 [2021-02-19 19:16:40,982 INFO L628 ElimStorePlain]: treesize reduction 27, result has 97.6 percent of original size [2021-02-19 19:16:41,086 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:16:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-02-19 19:16:41,122 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:41,250 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:16:41,250 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-02-19 19:16:41,275 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:43,071 WARN L202 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 204 DAG size of output: 196 [2021-02-19 19:16:43,072 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-02-19 19:16:43,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:43,143 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-02-19 19:16:43,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 19:16:43,277 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:16:43,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-02-19 19:16:43,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:45,031 WARN L202 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 203 DAG size of output: 185 [2021-02-19 19:16:45,033 INFO L628 ElimStorePlain]: treesize reduction 77, result has 93.1 percent of original size [2021-02-19 19:16:45,132 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:16:45,132 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-02-19 19:16:45,143 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:45,254 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:16:45,254 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-02-19 19:16:45,274 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:47,125 WARN L202 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 198 DAG size of output: 190 [2021-02-19 19:16:47,126 INFO L628 ElimStorePlain]: treesize reduction 51, result has 95.3 percent of original size [2021-02-19 19:16:47,228 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:16:47,228 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-02-19 19:16:47,240 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:47,327 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:16:47,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-02-19 19:16:47,332 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:49,212 WARN L202 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 191 DAG size of output: 184 [2021-02-19 19:16:49,213 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.8 percent of original size [2021-02-19 19:16:49,328 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:16:49,329 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-02-19 19:16:49,369 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:49,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:16:49,460 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-02-19 19:16:49,554 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:16:53,063 WARN L202 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 280 DAG size of output: 209 [2021-02-19 19:16:53,064 INFO L628 ElimStorePlain]: treesize reduction 440, result has 72.0 percent of original size [2021-02-19 19:16:53,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-02-19 19:16:53,440 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:3736 [2021-02-19 19:16:55,388 WARN L202 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 205 DAG size of output: 138 [2021-02-19 19:16:56,026 WARN L202 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2021-02-19 19:16:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:16:56,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:16:56,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:16:56,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521048209] [2021-02-19 19:16:56,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:16:56,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:16:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:16:56,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:16:56,158 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) [2021-02-19 19:16:56,948 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 40 [2021-02-19 19:16:57,659 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-02-19 19:16:57,979 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 32 [2021-02-19 19:16:58,256 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 55 [2021-02-19 19:16:58,584 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2021-02-19 19:16:58,855 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-02-19 19:16:59,396 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-02-19 19:16:59,841 WARN L202 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2021-02-19 19:17:00,372 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 86 [2021-02-19 19:17:00,627 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-02-19 19:17:00,921 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-02-19 19:17:01,190 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 59 [2021-02-19 19:17:01,810 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 60 [2021-02-19 19:17:01,972 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2021-02-19 19:17:02,549 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-02-19 19:17:03,683 WARN L202 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 91 [2021-02-19 19:17:04,172 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 90 [2021-02-19 19:17:04,939 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2021-02-19 19:17:05,699 WARN L202 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2021-02-19 19:17:07,078 WARN L202 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 248 DAG size of output: 144 [2021-02-19 19:17:08,475 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 143 DAG size of output: 122 [2021-02-19 19:17:09,891 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 153 DAG size of output: 106 [2021-02-19 19:17:10,727 WARN L202 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 93 [2021-02-19 19:17:11,660 WARN L202 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 76 [2021-02-19 19:17:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:11,749 INFO L93 Difference]: Finished difference Result 2388 states and 7448 transitions. [2021-02-19 19:17:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:17:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 26 [2021-02-19 19:17:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:11,753 INFO L225 Difference]: With dead ends: 2388 [2021-02-19 19:17:11,753 INFO L226 Difference]: Without dead ends: 2343 [2021-02-19 19:17:11,754 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=656, Invalid=4036, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 19:17:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-02-19 19:17:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1226. [2021-02-19 19:17:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.3485714285714288) internal successors, (4102), 1225 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 4102 transitions. [2021-02-19 19:17:11,773 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 4102 transitions. Word has length 26 [2021-02-19 19:17:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:11,773 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 4102 transitions. [2021-02-19 19:17:11,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) [2021-02-19 19:17:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 4102 transitions. [2021-02-19 19:17:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:11,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:11,775 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:17:11,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-02-19 19:17:11,976 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2123382322, now seen corresponding path program 7 times [2021-02-19 19:17:11,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:11,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984721170] [2021-02-19 19:17:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:12,274 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-02-19 19:17:12,403 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 19:17:12,521 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 19:17:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:12,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984721170] [2021-02-19 19:17:12,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386970846] [2021-02-19 19:17:12,751 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 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 [2021-02-19 19:17:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:17:12,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:13,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,291 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 39 treesize of output 23 [2021-02-19 19:17:13,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,301 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 39 treesize of output 23 [2021-02-19 19:17:13,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,314 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 31 treesize of output 16 [2021-02-19 19:17:13,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,323 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 26 treesize of output 16 [2021-02-19 19:17:13,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,331 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 35 treesize of output 21 [2021-02-19 19:17:13,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,340 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 44 treesize of output 26 [2021-02-19 19:17:13,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,349 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 31 treesize of output 16 [2021-02-19 19:17:13,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,357 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 30 treesize of output 18 [2021-02-19 19:17:13,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,365 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 30 treesize of output 18 [2021-02-19 19:17:13,365 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,373 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 36 treesize of output 22 [2021-02-19 19:17:13,374 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,381 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 21 treesize of output 10 [2021-02-19 19:17:13,382 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,390 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 44 treesize of output 26 [2021-02-19 19:17:13,391 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,398 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 35 treesize of output 21 [2021-02-19 19:17:13,399 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,406 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 36 treesize of output 22 [2021-02-19 19:17:13,407 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,416 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 41 treesize of output 22 [2021-02-19 19:17:13,418 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:13,423 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 26 treesize of output 16 [2021-02-19 19:17:13,424 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:13,503 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-02-19 19:17:13,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:17:13,505 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-02-19 19:17:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:13,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:13,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:17:13,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229849835] [2021-02-19 19:17:13,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:17:13,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:17:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:17:13,562 INFO L87 Difference]: Start difference. First operand 1226 states and 4102 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:17:13,814 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-02-19 19:17:14,244 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 19:17:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:14,667 INFO L93 Difference]: Finished difference Result 1379 states and 4511 transitions. [2021-02-19 19:17:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:17:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:17:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:14,669 INFO L225 Difference]: With dead ends: 1379 [2021-02-19 19:17:14,669 INFO L226 Difference]: Without dead ends: 1364 [2021-02-19 19:17:14,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:17:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-02-19 19:17:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1237. [2021-02-19 19:17:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 3.3454692556634305) internal successors, (4135), 1236 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4135 transitions. [2021-02-19 19:17:14,687 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4135 transitions. Word has length 26 [2021-02-19 19:17:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:14,687 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 4135 transitions. [2021-02-19 19:17:14,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:17:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4135 transitions. [2021-02-19 19:17:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:14,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:14,690 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:17:14,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-02-19 19:17:14,925 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:14,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1415024104, now seen corresponding path program 8 times [2021-02-19 19:17:14,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:14,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833704671] [2021-02-19 19:17:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:15,243 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-02-19 19:17:15,362 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 19:17:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:15,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833704671] [2021-02-19 19:17:15,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298351707] [2021-02-19 19:17:15,689 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 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 [2021-02-19 19:17:15,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:17:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:17:15,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:17:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:16,053 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:17:16,053 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 31 treesize of output 31 [2021-02-19 19:17:16,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,072 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,073 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 44 treesize of output 26 [2021-02-19 19:17:16,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,090 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,090 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 35 treesize of output 21 [2021-02-19 19:17:16,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,106 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,107 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 41 treesize of output 25 [2021-02-19 19:17:16,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,122 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,123 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 36 treesize of output 22 [2021-02-19 19:17:16,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,140 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,140 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 1 [2021-02-19 19:17:16,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,159 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,159 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 39 treesize of output 23 [2021-02-19 19:17:16,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,193 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:17:16,194 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 28 [2021-02-19 19:17:16,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,212 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,212 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 30 treesize of output 18 [2021-02-19 19:17:16,214 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:16,240 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 44 treesize of output 42 [2021-02-19 19:17:16,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,268 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-02-19 19:17:16,269 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 16 [2021-02-19 19:17:16,271 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,288 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,288 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 36 treesize of output 22 [2021-02-19 19:17:16,290 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,318 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,319 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 31 treesize of output 19 [2021-02-19 19:17:16,320 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,354 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:17:16,354 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 30 treesize of output 30 [2021-02-19 19:17:16,358 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,393 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:17:16,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-02-19 19:17:16,395 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,407 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:17:16,408 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 35 treesize of output 1 [2021-02-19 19:17:16,409 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:16,657 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 19:17:16,657 INFO L628 ElimStorePlain]: treesize reduction 68, result has 67.1 percent of original size [2021-02-19 19:17:16,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:17:16,659 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:793, output treesize:139 [2021-02-19 19:17:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:16,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:16,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:17:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785770929] [2021-02-19 19:17:16,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:17:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:17:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:17:16,974 INFO L87 Difference]: Start difference. First operand 1237 states and 4135 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:17,318 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-02-19 19:17:17,899 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-02-19 19:17:18,042 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-02-19 19:17:18,230 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 19:17:18,472 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-02-19 19:17:18,718 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2021-02-19 19:17:19,005 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-02-19 19:17:19,178 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-02-19 19:17:19,618 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-02-19 19:17:19,877 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-02-19 19:17:20,101 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-02-19 19:17:20,686 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-02-19 19:17:21,104 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 19:17:21,385 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-02-19 19:17:21,914 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2021-02-19 19:17:22,389 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2021-02-19 19:17:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:22,495 INFO L93 Difference]: Finished difference Result 1847 states and 5891 transitions. [2021-02-19 19:17:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:17:22,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:17:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:22,499 INFO L225 Difference]: With dead ends: 1847 [2021-02-19 19:17:22,499 INFO L226 Difference]: Without dead ends: 1832 [2021-02-19 19:17:22,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:17:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-02-19 19:17:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1241. [2021-02-19 19:17:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-02-19 19:17:22,518 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-02-19 19:17:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:22,518 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-02-19 19:17:22,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-02-19 19:17:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:22,520 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:22,520 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:17:22,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:17:22,721 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash 942533484, now seen corresponding path program 9 times [2021-02-19 19:17:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:22,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96972978] [2021-02-19 19:17:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:23,028 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-02-19 19:17:23,189 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-02-19 19:17:23,331 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-02-19 19:17:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96972978] [2021-02-19 19:17:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35581216] [2021-02-19 19:17:23,526 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 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 [2021-02-19 19:17:23,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:17:23,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:17:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:17:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:23,826 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 19:17:24,029 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 19:17:24,290 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 19:17:24,616 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_30], 6=[v_prenex_32, v_prenex_34]} [2021-02-19 19:17:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:24,634 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:24,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 1 [2021-02-19 19:17:24,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:24,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:24,652 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:17:24,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2021-02-19 19:17:24,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:24,923 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-02-19 19:17:24,923 INFO L628 ElimStorePlain]: treesize reduction 162, result has 64.1 percent of original size [2021-02-19 19:17:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:24,945 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:17:24,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-02-19 19:17:24,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:25,082 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 19:17:25,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:25,115 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-02-19 19:17:25,115 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 44 [2021-02-19 19:17:25,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:25,140 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-02-19 19:17:25,140 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 45 [2021-02-19 19:17:25,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:25,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:25,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:25,242 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-02-19 19:17:25,242 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 42 [2021-02-19 19:17:25,244 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:25,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:25,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:17:25,320 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:523, output treesize:78 [2021-02-19 19:17:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:25,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:25,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:17:25,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917809601] [2021-02-19 19:17:25,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:17:25,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:17:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:17:25,420 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:17:25,862 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2021-02-19 19:17:26,150 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 19:17:26,347 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 19:17:26,822 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2021-02-19 19:17:27,109 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-02-19 19:17:27,334 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-02-19 19:17:27,757 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2021-02-19 19:17:28,372 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-02-19 19:17:28,689 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-02-19 19:17:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:28,986 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-02-19 19:17:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:17:28,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:17:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:28,991 INFO L225 Difference]: With dead ends: 1876 [2021-02-19 19:17:28,991 INFO L226 Difference]: Without dead ends: 1861 [2021-02-19 19:17:28,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:17:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-02-19 19:17:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-02-19 19:17:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-02-19 19:17:29,016 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-02-19 19:17:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:29,016 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-02-19 19:17:29,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:17:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-02-19 19:17:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:29,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:29,018 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:17:29,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:17:29,219 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash 774724392, now seen corresponding path program 10 times [2021-02-19 19:17:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:29,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299963602] [2021-02-19 19:17:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:29,476 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-02-19 19:17:29,623 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 19:17:29,748 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 19:17:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299963602] [2021-02-19 19:17:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071299075] [2021-02-19 19:17:29,973 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:17:30,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:17:30,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:17:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:17:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,574 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 36 treesize of output 22 [2021-02-19 19:17:30,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:17:30,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,597 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 41 treesize of output 22 [2021-02-19 19:17:30,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,615 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 21 treesize of output 10 [2021-02-19 19:17:30,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,628 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 35 treesize of output 21 [2021-02-19 19:17:30,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,643 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 44 treesize of output 26 [2021-02-19 19:17:30,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,657 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 31 treesize of output 16 [2021-02-19 19:17:30,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,671 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 26 treesize of output 16 [2021-02-19 19:17:30,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,684 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 39 treesize of output 23 [2021-02-19 19:17:30,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,697 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 44 treesize of output 26 [2021-02-19 19:17:30,698 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-02-19 19:17:30,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,721 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 35 treesize of output 21 [2021-02-19 19:17:30,722 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,732 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 31 treesize of output 16 [2021-02-19 19:17:30,734 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,743 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 36 treesize of output 22 [2021-02-19 19:17:30,744 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:17:30,751 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:30,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:30,755 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 39 treesize of output 23 [2021-02-19 19:17:30,756 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:30,837 INFO L628 ElimStorePlain]: treesize reduction 73, result has 47.5 percent of original size [2021-02-19 19:17:30,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:17:30,838 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-02-19 19:17:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:30,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:17:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009484798] [2021-02-19 19:17:30,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:17:30,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:17:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:17:30,908 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-02-19 19:17:31,319 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 19:17:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:31,742 INFO L93 Difference]: Finished difference Result 1393 states and 4580 transitions. [2021-02-19 19:17:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:17:31,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 26 [2021-02-19 19:17:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:31,744 INFO L225 Difference]: With dead ends: 1393 [2021-02-19 19:17:31,744 INFO L226 Difference]: Without dead ends: 1378 [2021-02-19 19:17:31,745 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:17:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-02-19 19:17:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1246. [2021-02-19 19:17:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-02-19 19:17:31,760 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-02-19 19:17:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:31,760 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-02-19 19:17:31,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-02-19 19:17:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-02-19 19:17:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:31,762 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:31,762 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:17:31,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:17:31,963 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1292791636, now seen corresponding path program 11 times [2021-02-19 19:17:31,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:31,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425810916] [2021-02-19 19:17:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:32,185 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 19:17:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425810916] [2021-02-19 19:17:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962969197] [2021-02-19 19:17:32,435 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 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 [2021-02-19 19:17:32,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:17:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:17:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:17:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:32,993 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:17:32,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 19:17:32,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,017 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:17:33,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-02-19 19:17:33,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:33,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:17:33,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:17:33,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:17:33,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:17:33,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-02-19 19:17:33,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:33,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-02-19 19:17:33,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:17:33,160 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:17:33,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-02-19 19:17:33,198 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,213 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:17:33,219 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,233 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:17:33,234 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:17:33,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:17:33,258 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:33,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:17:33,270 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:33,437 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 19:17:33,437 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-02-19 19:17:33,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:17:33,441 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-02-19 19:17:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:33,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:33,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:17:33,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666332679] [2021-02-19 19:17:33,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:17:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:17:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:17:33,627 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:34,149 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-02-19 19:17:34,325 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 53 [2021-02-19 19:17:34,606 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-02-19 19:17:34,841 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 19:17:35,138 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-02-19 19:17:35,403 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-02-19 19:17:35,588 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-02-19 19:17:35,868 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2021-02-19 19:17:36,035 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 19:17:36,334 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-02-19 19:17:36,568 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-02-19 19:17:36,740 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 19:17:37,104 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 19:17:37,340 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-02-19 19:17:37,817 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-02-19 19:17:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:38,139 INFO L93 Difference]: Finished difference Result 2193 states and 7062 transitions. [2021-02-19 19:17:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:17:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:17:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:38,144 INFO L225 Difference]: With dead ends: 2193 [2021-02-19 19:17:38,144 INFO L226 Difference]: Without dead ends: 2163 [2021-02-19 19:17:38,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:17:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-02-19 19:17:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1246. [2021-02-19 19:17:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-02-19 19:17:38,165 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-02-19 19:17:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:38,165 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-02-19 19:17:38,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-02-19 19:17:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:38,167 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:38,168 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:17:38,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-02-19 19:17:38,368 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -260608352, now seen corresponding path program 12 times [2021-02-19 19:17:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:38,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729262564] [2021-02-19 19:17:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:38,684 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-02-19 19:17:38,825 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 19:17:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:39,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729262564] [2021-02-19 19:17:39,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106602597] [2021-02-19 19:17:39,108 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 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 [2021-02-19 19:17:39,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:17:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:17:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:17:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:39,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,482 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-02-19 19:17:39,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:39,509 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-02-19 19:17:39,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:17:39,535 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-02-19 19:17:39,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,552 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-02-19 19:17:39,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,569 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-02-19 19:17:39,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,585 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,585 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-02-19 19:17:39,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,605 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,605 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-02-19 19:17:39,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,626 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:17:39,626 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:17:39,628 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,646 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,646 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-02-19 19:17:39,647 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,665 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:17:39,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,697 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-02-19 19:17:39,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,714 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,714 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-02-19 19:17:39,715 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:39,737 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-02-19 19:17:39,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:17:39,770 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-02-19 19:17:39,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,786 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-02-19 19:17:39,787 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:39,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:17:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:17:39,797 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:39,939 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:17:39,939 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-02-19 19:17:39,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:17:39,941 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-02-19 19:17:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:40,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:40,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:17:40,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503628007] [2021-02-19 19:17:40,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:17:40,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:17:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:17:40,108 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:40,458 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 41 [2021-02-19 19:17:40,734 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-02-19 19:17:41,004 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 19:17:41,175 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 19:17:41,382 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-02-19 19:17:41,766 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-02-19 19:17:41,973 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 19:17:42,217 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 19:17:42,488 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-02-19 19:17:42,912 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-02-19 19:17:43,238 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2021-02-19 19:17:43,452 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-02-19 19:17:43,906 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-02-19 19:17:44,259 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-02-19 19:17:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:44,405 INFO L93 Difference]: Finished difference Result 1816 states and 5940 transitions. [2021-02-19 19:17:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:17:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:17:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:44,409 INFO L225 Difference]: With dead ends: 1816 [2021-02-19 19:17:44,409 INFO L226 Difference]: Without dead ends: 1801 [2021-02-19 19:17:44,409 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:17:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-02-19 19:17:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1246. [2021-02-19 19:17:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-02-19 19:17:44,428 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-02-19 19:17:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:44,428 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-02-19 19:17:44,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-02-19 19:17:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:44,430 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:44,430 INFO L506 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] [2021-02-19 19:17:44,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-02-19 19:17:44,630 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash -320779920, now seen corresponding path program 39 times [2021-02-19 19:17:44,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:44,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818284608] [2021-02-19 19:17:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:45,102 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 19:17:45,233 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 19:17:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:45,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818284608] [2021-02-19 19:17:45,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946012081] [2021-02-19 19:17:45,473 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 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 [2021-02-19 19:17:45,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:17:45,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:17:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:17:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,418 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 53 treesize of output 27 [2021-02-19 19:17:46,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,435 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 46 treesize of output 24 [2021-02-19 19:17:46,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,451 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 73 treesize of output 37 [2021-02-19 19:17:46,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,471 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 48 treesize of output 26 [2021-02-19 19:17:46,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,489 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 61 treesize of output 31 [2021-02-19 19:17:46,491 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,506 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 44 treesize of output 24 [2021-02-19 19:17:46,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,525 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 58 treesize of output 30 [2021-02-19 19:17:46,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,543 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 24 [2021-02-19 19:17:46,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,561 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 59 treesize of output 31 [2021-02-19 19:17:46,564 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,579 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 39 treesize of output 18 [2021-02-19 19:17:46,581 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,597 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 62 treesize of output 32 [2021-02-19 19:17:46,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,613 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 65 treesize of output 33 [2021-02-19 19:17:46,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,628 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 54 treesize of output 28 [2021-02-19 19:17:46,630 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,640 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 50 treesize of output 26 [2021-02-19 19:17:46,641 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,651 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 46 treesize of output 24 [2021-02-19 19:17:46,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:46,658 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 43 treesize of output 23 [2021-02-19 19:17:46,659 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:46,754 INFO L628 ElimStorePlain]: treesize reduction 349, result has 11.4 percent of original size [2021-02-19 19:17:46,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:17:46,755 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:39 [2021-02-19 19:17:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:46,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:46,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-02-19 19:17:46,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655445110] [2021-02-19 19:17:46,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:17:46,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:46,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:17:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:17:46,818 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 19:17:47,401 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 19:17:47,587 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-02-19 19:17:48,108 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2021-02-19 19:17:48,488 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 19:17:48,755 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-02-19 19:17:49,018 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 19:17:49,251 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 19:17:49,567 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-02-19 19:17:50,123 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 19:17:50,303 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-02-19 19:17:50,576 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-02-19 19:17:50,790 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 19:17:51,188 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-02-19 19:17:51,484 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 19:17:51,750 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-02-19 19:17:51,913 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 19:17:52,293 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:17:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:52,418 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-02-19 19:17:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:17:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 26 [2021-02-19 19:17:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:52,424 INFO L225 Difference]: With dead ends: 2938 [2021-02-19 19:17:52,424 INFO L226 Difference]: Without dead ends: 2893 [2021-02-19 19:17:52,425 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=555, Invalid=2637, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:17:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-02-19 19:17:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-02-19 19:17:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-02-19 19:17:52,448 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-02-19 19:17:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:52,448 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-02-19 19:17:52,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 19:17:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-02-19 19:17:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:52,450 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:52,450 INFO L506 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] [2021-02-19 19:17:52,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable803 [2021-02-19 19:17:52,652 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 881532448, now seen corresponding path program 40 times [2021-02-19 19:17:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:52,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697127497] [2021-02-19 19:17:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:17:53,113 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 19:17:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:53,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697127497] [2021-02-19 19:17:53,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118885032] [2021-02-19 19:17:53,497 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 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 [2021-02-19 19:17:53,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:17:53,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:17:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:17:53,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:17:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,434 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 24 [2021-02-19 19:17:54,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,455 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 58 treesize of output 30 [2021-02-19 19:17:54,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,476 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 61 treesize of output 31 [2021-02-19 19:17:54,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,495 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 44 treesize of output 24 [2021-02-19 19:17:54,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,516 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 46 treesize of output 24 [2021-02-19 19:17:54,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,534 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 59 treesize of output 31 [2021-02-19 19:17:54,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-02-19 19:17:54,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,573 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 65 treesize of output 33 [2021-02-19 19:17:54,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,594 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 54 treesize of output 28 [2021-02-19 19:17:54,596 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,613 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 43 treesize of output 23 [2021-02-19 19:17:54,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,631 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 73 treesize of output 37 [2021-02-19 19:17:54,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,649 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 46 treesize of output 24 [2021-02-19 19:17:54,651 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-02-19 19:17:54,670 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,686 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 62 treesize of output 32 [2021-02-19 19:17:54,688 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-02-19 19:17:54,706 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:17:54,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:17:54,715 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 39 treesize of output 18 [2021-02-19 19:17:54,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:17:54,858 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2021-02-19 19:17:54,858 INFO L628 ElimStorePlain]: treesize reduction 351, result has 11.8 percent of original size [2021-02-19 19:17:54,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:17:54,860 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-02-19 19:17:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:17:54,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:17:54,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-02-19 19:17:54,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869107876] [2021-02-19 19:17:54,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:17:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:17:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:17:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:17:54,921 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 19:17:55,293 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-02-19 19:17:55,496 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 19:17:55,680 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-02-19 19:17:56,006 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 19:17:56,169 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 19:17:56,423 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-02-19 19:17:56,558 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-02-19 19:17:56,935 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 19:17:57,223 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-02-19 19:17:57,677 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2021-02-19 19:17:58,020 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-02-19 19:17:58,706 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-02-19 19:17:58,985 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-02-19 19:17:59,238 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-02-19 19:17:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:17:59,579 INFO L93 Difference]: Finished difference Result 2772 states and 8760 transitions. [2021-02-19 19:17:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:17:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 26 [2021-02-19 19:17:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:17:59,585 INFO L225 Difference]: With dead ends: 2772 [2021-02-19 19:17:59,585 INFO L226 Difference]: Without dead ends: 2727 [2021-02-19 19:17:59,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=472, Invalid=2078, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:17:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-02-19 19:17:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 1288. [2021-02-19 19:17:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:17:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-02-19 19:17:59,609 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-02-19 19:17:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:17:59,609 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-02-19 19:17:59,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 19:17:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-02-19 19:17:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:17:59,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:17:59,611 INFO L506 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] [2021-02-19 19:17:59,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-02-19 19:17:59,811 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:17:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:17:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1579786196, now seen corresponding path program 41 times [2021-02-19 19:17:59,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:17:59,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020263412] [2021-02-19 19:17:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:17:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:00,263 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 19:18:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:00,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020263412] [2021-02-19 19:18:00,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728852308] [2021-02-19 19:18:00,530 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:18:00,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:18:00,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:18:00,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:18:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,387 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-02-19 19:18:01,387 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 38 [2021-02-19 19:18:01,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,443 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-02-19 19:18:01,443 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 51 treesize of output 55 [2021-02-19 19:18:01,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,484 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-02-19 19:18:01,485 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 33 [2021-02-19 19:18:01,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,525 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-02-19 19:18:01,526 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 58 treesize of output 44 [2021-02-19 19:18:01,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,553 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,553 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 39 treesize of output 21 [2021-02-19 19:18:01,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,602 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-02-19 19:18:01,603 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 65 treesize of output 51 [2021-02-19 19:18:01,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,630 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,630 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 48 treesize of output 1 [2021-02-19 19:18:01,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,669 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-02-19 19:18:01,669 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 53 treesize of output 36 [2021-02-19 19:18:01,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,692 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,693 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 43 treesize of output 23 [2021-02-19 19:18:01,694 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,742 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-02-19 19:18:01,742 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 73 treesize of output 43 [2021-02-19 19:18:01,744 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,767 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,767 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 62 treesize of output 1 [2021-02-19 19:18:01,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,794 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,794 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 1 [2021-02-19 19:18:01,795 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,823 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,823 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 61 treesize of output 1 [2021-02-19 19:18:01,824 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,868 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-02-19 19:18:01,869 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 59 treesize of output 40 [2021-02-19 19:18:01,872 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,906 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,907 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 54 treesize of output 1 [2021-02-19 19:18:01,908 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:01,924 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:18:01,925 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 50 treesize of output 26 [2021-02-19 19:18:01,926 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:02,108 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-02-19 19:18:02,108 INFO L628 ElimStorePlain]: treesize reduction 241, result has 31.5 percent of original size [2021-02-19 19:18:02,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:18:02,111 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1125, output treesize:115 [2021-02-19 19:18:02,249 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 19:18:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:02,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:02,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-02-19 19:18:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925635136] [2021-02-19 19:18:02,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:18:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:18:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:18:02,326 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 19:18:02,859 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 19:18:03,058 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-02-19 19:18:03,281 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-02-19 19:18:03,705 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-02-19 19:18:03,997 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2021-02-19 19:18:04,883 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-02-19 19:18:05,612 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2021-02-19 19:18:05,807 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-02-19 19:18:06,051 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2021-02-19 19:18:06,268 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2021-02-19 19:18:06,734 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 19:18:07,064 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-02-19 19:18:07,423 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-02-19 19:18:07,698 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-02-19 19:18:08,054 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-02-19 19:18:08,413 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-02-19 19:18:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:08,793 INFO L93 Difference]: Finished difference Result 2989 states and 9319 transitions. [2021-02-19 19:18:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:18:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 26 [2021-02-19 19:18:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:08,798 INFO L225 Difference]: With dead ends: 2989 [2021-02-19 19:18:08,798 INFO L226 Difference]: Without dead ends: 2944 [2021-02-19 19:18:08,799 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=698, Invalid=2842, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:18:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-02-19 19:18:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1292. [2021-02-19 19:18:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-02-19 19:18:08,834 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-02-19 19:18:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:08,834 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-02-19 19:18:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 19:18:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-02-19 19:18:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:08,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:08,837 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:09,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-02-19 19:18:09,038 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1864586998, now seen corresponding path program 13 times [2021-02-19 19:18:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:09,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327078892] [2021-02-19 19:18:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:09,322 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-02-19 19:18:09,453 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-02-19 19:18:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327078892] [2021-02-19 19:18:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729834476] [2021-02-19 19:18:09,788 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 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 [2021-02-19 19:18:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:18:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,361 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 26 treesize of output 16 [2021-02-19 19:18:10,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,374 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 36 treesize of output 22 [2021-02-19 19:18:10,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,388 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 39 treesize of output 23 [2021-02-19 19:18:10,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,402 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 30 treesize of output 18 [2021-02-19 19:18:10,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,417 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 39 treesize of output 23 [2021-02-19 19:18:10,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:18:10,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,439 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 21 treesize of output 10 [2021-02-19 19:18:10,441 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,451 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 41 treesize of output 22 [2021-02-19 19:18:10,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,461 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 26 treesize of output 16 [2021-02-19 19:18:10,462 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,471 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 35 treesize of output 21 [2021-02-19 19:18:10,472 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,481 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 36 treesize of output 22 [2021-02-19 19:18:10,482 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,491 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 31 treesize of output 16 [2021-02-19 19:18:10,492 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,500 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 44 treesize of output 26 [2021-02-19 19:18:10,502 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,508 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 30 treesize of output 18 [2021-02-19 19:18:10,509 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:18:10,518 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:10,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:10,522 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 31 treesize of output 16 [2021-02-19 19:18:10,523 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:10,615 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-02-19 19:18:10,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:18:10,617 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-02-19 19:18:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:10,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:10,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:18:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536430186] [2021-02-19 19:18:10,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:18:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:18:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:18:10,691 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:18:10,837 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 19:18:11,198 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 19:18:11,547 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 19:18:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:12,069 INFO L93 Difference]: Finished difference Result 1696 states and 5593 transitions. [2021-02-19 19:18:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:18:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:18:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:12,082 INFO L225 Difference]: With dead ends: 1696 [2021-02-19 19:18:12,082 INFO L226 Difference]: Without dead ends: 1681 [2021-02-19 19:18:12,082 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:18:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-02-19 19:18:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1309. [2021-02-19 19:18:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-02-19 19:18:12,098 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-02-19 19:18:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:12,098 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-02-19 19:18:12,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:18:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-02-19 19:18:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:12,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:12,100 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:12,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-02-19 19:18:12,301 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash 372675864, now seen corresponding path program 14 times [2021-02-19 19:18:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:12,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962923324] [2021-02-19 19:18:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:12,594 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-02-19 19:18:12,823 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-02-19 19:18:13,012 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 19:18:13,205 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 19:18:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:13,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962923324] [2021-02-19 19:18:13,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740491251] [2021-02-19 19:18:13,385 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 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 [2021-02-19 19:18:13,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:18:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:18:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:13,943 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 19:18:14,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:14,044 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-02-19 19:18:14,044 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 36 treesize of output 38 [2021-02-19 19:18:14,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:14,265 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-02-19 19:18:14,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:14,303 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-02-19 19:18:14,303 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 58 treesize of output 52 [2021-02-19 19:18:14,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:14,548 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-02-19 19:18:14,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:14,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:14,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 64 [2021-02-19 19:18:14,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:14,820 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-02-19 19:18:14,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:14,856 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-02-19 19:18:14,856 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 45 treesize of output 45 [2021-02-19 19:18:14,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:15,086 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-02-19 19:18:15,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:15,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:15,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:15,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 19:18:15,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:15,556 WARN L202 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2021-02-19 19:18:15,556 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.6 percent of original size [2021-02-19 19:18:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:15,593 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-02-19 19:18:15,594 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 63 treesize of output 53 [2021-02-19 19:18:15,596 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:15,841 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-02-19 19:18:15,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:15,874 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-02-19 19:18:15,874 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 45 [2021-02-19 19:18:15,878 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:16,102 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 19:18:16,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:16,131 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-02-19 19:18:16,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-02-19 19:18:16,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:16,345 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 19:18:16,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:16,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:18:16,372 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:543, output treesize:534 [2021-02-19 19:18:16,762 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-02-19 19:18:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:16,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:16,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:18:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987950153] [2021-02-19 19:18:16,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:18:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:18:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:18:16,976 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:17,167 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-02-19 19:18:17,426 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-02-19 19:18:17,981 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-02-19 19:18:18,368 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2021-02-19 19:18:18,641 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-02-19 19:18:19,029 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-02-19 19:18:19,248 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 19:18:19,584 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-02-19 19:18:19,897 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 19:18:20,627 WARN L202 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-02-19 19:18:20,981 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 19:18:21,925 WARN L202 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-02-19 19:18:22,306 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-02-19 19:18:22,586 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-02-19 19:18:22,834 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 19:18:23,281 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2021-02-19 19:18:23,523 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-02-19 19:18:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:23,618 INFO L93 Difference]: Finished difference Result 1921 states and 6170 transitions. [2021-02-19 19:18:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:18:23,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:18:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:23,622 INFO L225 Difference]: With dead ends: 1921 [2021-02-19 19:18:23,622 INFO L226 Difference]: Without dead ends: 1891 [2021-02-19 19:18:23,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:18:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-02-19 19:18:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1297. [2021-02-19 19:18:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-02-19 19:18:23,642 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-02-19 19:18:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:23,642 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-02-19 19:18:23,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-02-19 19:18:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:23,644 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:23,644 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:23,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-02-19 19:18:23,846 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1201328808, now seen corresponding path program 15 times [2021-02-19 19:18:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273731648] [2021-02-19 19:18:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:24,126 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-02-19 19:18:24,271 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-02-19 19:18:24,422 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 19:18:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:24,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273731648] [2021-02-19 19:18:24,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103436378] [2021-02-19 19:18:24,694 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 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 [2021-02-19 19:18:24,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:18:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:18:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:25,359 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:25,360 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 30 treesize of output 30 [2021-02-19 19:18:25,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,378 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,378 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 39 treesize of output 23 [2021-02-19 19:18:25,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,394 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,394 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 30 treesize of output 18 [2021-02-19 19:18:25,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,429 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:25,430 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 39 treesize of output 35 [2021-02-19 19:18:25,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,448 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,448 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 36 treesize of output 22 [2021-02-19 19:18:25,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,478 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:18:25,479 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 23 [2021-02-19 19:18:25,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,530 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:25,530 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 31 treesize of output 31 [2021-02-19 19:18:25,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,555 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,555 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 41 treesize of output 25 [2021-02-19 19:18:25,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,577 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,577 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 36 treesize of output 22 [2021-02-19 19:18:25,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,598 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,598 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 31 treesize of output 19 [2021-02-19 19:18:25,599 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,640 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:25,640 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 35 treesize of output 33 [2021-02-19 19:18:25,643 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,661 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,662 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 13 [2021-02-19 19:18:25,664 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:25,695 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 44 treesize of output 42 [2021-02-19 19:18:25,718 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,735 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,735 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 35 treesize of output 21 [2021-02-19 19:18:25,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,758 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-02-19 19:18:25,760 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:25,771 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:25,772 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 44 treesize of output 26 [2021-02-19 19:18:25,773 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:26,142 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-02-19 19:18:26,142 INFO L628 ElimStorePlain]: treesize reduction 119, result has 57.2 percent of original size [2021-02-19 19:18:26,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:18:26,152 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:219 [2021-02-19 19:18:26,377 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 19:18:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:26,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:26,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-02-19 19:18:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54196525] [2021-02-19 19:18:26,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:18:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:18:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:18:26,505 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-02-19 19:18:27,649 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2021-02-19 19:18:27,808 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-02-19 19:18:28,076 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-02-19 19:18:28,674 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2021-02-19 19:18:28,882 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 19:18:29,320 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-02-19 19:18:29,507 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-02-19 19:18:30,130 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-02-19 19:18:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:30,273 INFO L93 Difference]: Finished difference Result 1876 states and 6097 transitions. [2021-02-19 19:18:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:18:30,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-02-19 19:18:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:30,278 INFO L225 Difference]: With dead ends: 1876 [2021-02-19 19:18:30,279 INFO L226 Difference]: Without dead ends: 1861 [2021-02-19 19:18:30,279 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:18:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-02-19 19:18:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1306. [2021-02-19 19:18:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-02-19 19:18:30,305 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-02-19 19:18:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:30,305 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-02-19 19:18:30,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-02-19 19:18:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-02-19 19:18:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:30,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:30,308 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:30,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:18:30,526 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1033519716, now seen corresponding path program 16 times [2021-02-19 19:18:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:30,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71378942] [2021-02-19 19:18:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:30,897 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-02-19 19:18:31,085 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-02-19 19:18:31,212 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-02-19 19:18:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:31,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71378942] [2021-02-19 19:18:31,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487211498] [2021-02-19 19:18:31,484 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 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 [2021-02-19 19:18:31,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:18:31,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:18:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,106 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 31 treesize of output 16 [2021-02-19 19:18:32,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,119 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 41 treesize of output 22 [2021-02-19 19:18:32,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,133 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 30 treesize of output 18 [2021-02-19 19:18:32,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:18:32,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,159 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 44 treesize of output 26 [2021-02-19 19:18:32,161 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,173 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 21 treesize of output 10 [2021-02-19 19:18:32,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:18:32,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,201 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 36 treesize of output 22 [2021-02-19 19:18:32,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,215 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 30 treesize of output 18 [2021-02-19 19:18:32,217 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:18:32,230 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,243 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 44 treesize of output 26 [2021-02-19 19:18:32,244 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,256 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 31 treesize of output 16 [2021-02-19 19:18:32,257 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,268 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 26 treesize of output 16 [2021-02-19 19:18:32,269 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,279 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 35 treesize of output 21 [2021-02-19 19:18:32,281 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,293 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 36 treesize of output 22 [2021-02-19 19:18:32,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:32,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:32,301 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 26 treesize of output 16 [2021-02-19 19:18:32,303 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:32,416 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 19:18:32,416 INFO L628 ElimStorePlain]: treesize reduction 73, result has 47.5 percent of original size [2021-02-19 19:18:32,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:18:32,419 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-02-19 19:18:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:32,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:32,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:18:32,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502149116] [2021-02-19 19:18:32,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:18:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:18:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:18:32,502 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-02-19 19:18:32,926 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-02-19 19:18:33,166 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 19:18:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:33,292 INFO L93 Difference]: Finished difference Result 1653 states and 5506 transitions. [2021-02-19 19:18:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:18:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 26 [2021-02-19 19:18:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:33,296 INFO L225 Difference]: With dead ends: 1653 [2021-02-19 19:18:33,296 INFO L226 Difference]: Without dead ends: 1638 [2021-02-19 19:18:33,296 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:18:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-02-19 19:18:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1309. [2021-02-19 19:18:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3929663608562692) internal successors, (4438), 1308 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4438 transitions. [2021-02-19 19:18:33,325 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4438 transitions. Word has length 26 [2021-02-19 19:18:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:33,325 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4438 transitions. [2021-02-19 19:18:33,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-02-19 19:18:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4438 transitions. [2021-02-19 19:18:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:33,327 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:33,327 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:33,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:18:33,528 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1033996312, now seen corresponding path program 17 times [2021-02-19 19:18:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:33,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744153842] [2021-02-19 19:18:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:33,800 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-02-19 19:18:33,929 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-02-19 19:18:34,077 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 19:18:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:34,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744153842] [2021-02-19 19:18:34,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142719232] [2021-02-19 19:18:34,319 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 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 [2021-02-19 19:18:34,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:18:34,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:34,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:18:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:34,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:18:34,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:34,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-02-19 19:18:34,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:34,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:18:34,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:34,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,946 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:18:34,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,962 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:34,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-02-19 19:18:34,964 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:34,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:18:34,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:34,993 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:18:34,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,008 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:18:35,009 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:35,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:18:35,029 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,046 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:18:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-02-19 19:18:35,047 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,060 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:35,061 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,073 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:18:35,075 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,088 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:18:35,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,101 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:18:35,102 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,113 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:18:35,115 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:35,124 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:35,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:35,125 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:35,251 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 19:18:35,252 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.1 percent of original size [2021-02-19 19:18:35,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:18:35,258 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-02-19 19:18:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:35,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:35,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:18:35,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096938103] [2021-02-19 19:18:35,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:18:35,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:18:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:18:35,513 INFO L87 Difference]: Start difference. First operand 1309 states and 4438 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:36,136 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2021-02-19 19:18:36,306 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 46 [2021-02-19 19:18:36,997 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-02-19 19:18:37,329 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2021-02-19 19:18:37,550 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 19:18:37,926 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-02-19 19:18:38,421 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 19:18:38,805 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 19:18:38,965 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:18:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:39,235 INFO L93 Difference]: Finished difference Result 2085 states and 6781 transitions. [2021-02-19 19:18:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:18:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:18:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:39,240 INFO L225 Difference]: With dead ends: 2085 [2021-02-19 19:18:39,240 INFO L226 Difference]: Without dead ends: 2055 [2021-02-19 19:18:39,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:18:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-02-19 19:18:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1306. [2021-02-19 19:18:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-02-19 19:18:39,260 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-02-19 19:18:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:39,260 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-02-19 19:18:39,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-02-19 19:18:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:39,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:39,262 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:39,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-02-19 19:18:39,463 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2081106856, now seen corresponding path program 18 times [2021-02-19 19:18:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:39,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588776645] [2021-02-19 19:18:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:39,808 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-19 19:18:40,020 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-02-19 19:18:40,235 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 19:18:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588776645] [2021-02-19 19:18:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298723711] [2021-02-19 19:18:40,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:18:40,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:18:40,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:18:40,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:41,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:18:41,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:41,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-02-19 19:18:41,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-02-19 19:18:41,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:18:41,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:41,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-02-19 19:18:41,129 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,145 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:18:41,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:18:41,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:41,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:18:41,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,204 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:18:41,206 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:18:41,222 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,240 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:18:41,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:18:41,259 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:18:41,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:18:41,290 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:41,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:41,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:41,301 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:41,492 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 19:18:41,492 INFO L628 ElimStorePlain]: treesize reduction 54, result has 59.7 percent of original size [2021-02-19 19:18:41,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:18:41,494 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-02-19 19:18:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:41,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:41,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:18:41,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630143748] [2021-02-19 19:18:41,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:18:41,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:41,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:18:41,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:18:41,699 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:42,294 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 50 [2021-02-19 19:18:42,624 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 19:18:43,040 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-02-19 19:18:43,403 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-02-19 19:18:43,726 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-02-19 19:18:44,047 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-02-19 19:18:44,361 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 19:18:44,581 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 19:18:44,961 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-02-19 19:18:45,133 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 19:18:45,491 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-02-19 19:18:45,726 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-02-19 19:18:45,897 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:18:46,290 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-02-19 19:18:46,549 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-02-19 19:18:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:46,686 INFO L93 Difference]: Finished difference Result 2025 states and 6626 transitions. [2021-02-19 19:18:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:18:46,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:18:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:46,690 INFO L225 Difference]: With dead ends: 2025 [2021-02-19 19:18:46,690 INFO L226 Difference]: Without dead ends: 2010 [2021-02-19 19:18:46,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:18:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-02-19 19:18:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1303. [2021-02-19 19:18:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.387864823348694) internal successors, (4411), 1302 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4411 transitions. [2021-02-19 19:18:46,711 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4411 transitions. Word has length 26 [2021-02-19 19:18:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:46,711 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4411 transitions. [2021-02-19 19:18:46,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4411 transitions. [2021-02-19 19:18:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:46,713 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:46,713 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:46,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:18:46,913 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash 663835952, now seen corresponding path program 19 times [2021-02-19 19:18:46,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:46,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757059790] [2021-02-19 19:18:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:47,202 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-02-19 19:18:47,327 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-02-19 19:18:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:47,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757059790] [2021-02-19 19:18:47,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202396336] [2021-02-19 19:18:47,583 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 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 [2021-02-19 19:18:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:47,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:18:47,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,197 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 44 treesize of output 26 [2021-02-19 19:18:48,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,210 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 30 treesize of output 18 [2021-02-19 19:18:48,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,223 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 26 treesize of output 16 [2021-02-19 19:18:48,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,235 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 39 treesize of output 23 [2021-02-19 19:18:48,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:18:48,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,259 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 26 treesize of output 16 [2021-02-19 19:18:48,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:48,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-02-19 19:18:48,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,296 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 31 treesize of output 16 [2021-02-19 19:18:48,298 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,310 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 35 treesize of output 21 [2021-02-19 19:18:48,311 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-02-19 19:18:48,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,331 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 39 treesize of output 23 [2021-02-19 19:18:48,332 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,342 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 35 treesize of output 21 [2021-02-19 19:18:48,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,354 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 36 treesize of output 22 [2021-02-19 19:18:48,355 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,365 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 21 treesize of output 10 [2021-02-19 19:18:48,367 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:48,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:18:48,374 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 44 treesize of output 26 [2021-02-19 19:18:48,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:48,497 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 19:18:48,497 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-02-19 19:18:48,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:18:48,500 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-02-19 19:18:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:48,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:48,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:18:48,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133892877] [2021-02-19 19:18:48,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:18:48,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:18:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:18:48,586 INFO L87 Difference]: Start difference. First operand 1303 states and 4411 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:18:49,030 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 19:18:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:49,986 INFO L93 Difference]: Finished difference Result 1736 states and 5716 transitions. [2021-02-19 19:18:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:18:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:18:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:49,990 INFO L225 Difference]: With dead ends: 1736 [2021-02-19 19:18:49,990 INFO L226 Difference]: Without dead ends: 1715 [2021-02-19 19:18:49,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:18:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-02-19 19:18:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-02-19 19:18:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3827252419955323) internal successors, (4543), 1343 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4543 transitions. [2021-02-19 19:18:50,014 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4543 transitions. Word has length 26 [2021-02-19 19:18:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:50,014 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 4543 transitions. [2021-02-19 19:18:50,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:18:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4543 transitions. [2021-02-19 19:18:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:50,017 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:50,017 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:50,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-02-19 19:18:50,230 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash 496026860, now seen corresponding path program 20 times [2021-02-19 19:18:50,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:50,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995609315] [2021-02-19 19:18:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:50,555 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 19:18:50,832 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 19:18:50,974 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 19:18:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:51,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995609315] [2021-02-19 19:18:51,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079126086] [2021-02-19 19:18:51,283 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 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 [2021-02-19 19:18:51,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:18:51,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 19:18:51,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:51,903 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:51,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-02-19 19:18:51,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:51,926 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:51,926 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 39 treesize of output 23 [2021-02-19 19:18:51,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:51,948 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:51,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:18:51,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:51,970 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:51,971 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 31 treesize of output 19 [2021-02-19 19:18:51,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,020 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:52,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-02-19 19:18:52,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,068 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:18:52,069 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 39 treesize of output 35 [2021-02-19 19:18:52,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,091 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,092 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 44 treesize of output 26 [2021-02-19 19:18:52,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,114 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,114 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 41 treesize of output 25 [2021-02-19 19:18:52,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,160 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:18:52,160 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 30 treesize of output 25 [2021-02-19 19:18:52,162 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,179 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,180 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 36 treesize of output 22 [2021-02-19 19:18:52,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,198 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,198 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 30 treesize of output 18 [2021-02-19 19:18:52,200 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,219 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,219 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 1 [2021-02-19 19:18:52,220 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-02-19 19:18:52,252 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,285 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:18:52,286 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 26 treesize of output 23 [2021-02-19 19:18:52,287 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,303 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,303 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 13 [2021-02-19 19:18:52,306 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,316 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:18:52,316 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 36 treesize of output 22 [2021-02-19 19:18:52,318 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:52,546 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 19:18:52,546 INFO L628 ElimStorePlain]: treesize reduction 108, result has 58.3 percent of original size [2021-02-19 19:18:52,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:18:52,556 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:249 [2021-02-19 19:18:52,796 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 19:18:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:53,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:53,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:18:53,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786723352] [2021-02-19 19:18:53,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:18:53,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:18:53,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:18:53,075 INFO L87 Difference]: Start difference. First operand 1344 states and 4543 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:53,386 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 36 [2021-02-19 19:18:53,552 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 19:18:53,759 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 19:18:53,977 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-02-19 19:18:54,200 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-02-19 19:18:54,367 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 19:18:54,552 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-02-19 19:18:54,906 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 19:18:55,181 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-02-19 19:18:55,342 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 19:18:55,608 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 19:18:55,979 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-02-19 19:18:56,376 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-02-19 19:18:56,640 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-02-19 19:18:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:18:56,770 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-02-19 19:18:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:18:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:18:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:18:56,774 INFO L225 Difference]: With dead ends: 1754 [2021-02-19 19:18:56,774 INFO L226 Difference]: Without dead ends: 1729 [2021-02-19 19:18:56,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:18:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-02-19 19:18:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1358. [2021-02-19 19:18:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3920412675018423) internal successors, (4603), 1357 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4603 transitions. [2021-02-19 19:18:56,792 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4603 transitions. Word has length 26 [2021-02-19 19:18:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:18:56,792 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 4603 transitions. [2021-02-19 19:18:56,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4603 transitions. [2021-02-19 19:18:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:18:56,794 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:18:56,794 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:18:56,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:18:56,995 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:18:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:18:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1480836820, now seen corresponding path program 21 times [2021-02-19 19:18:56,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:18:56,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278563186] [2021-02-19 19:18:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:18:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:18:57,427 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2021-02-19 19:18:57,698 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-02-19 19:18:57,848 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-02-19 19:18:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:58,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278563186] [2021-02-19 19:18:58,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525264388] [2021-02-19 19:18:58,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:18:58,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:18:58,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:18:58,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:18:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:18:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:18:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 19:18:58,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:18:58,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:58,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:18:58,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:58,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-02-19 19:18:58,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:58,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,805 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:18:58,807 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:58,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:18:58,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:18:58,853 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,873 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:18:58,875 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:18:58,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:18:58,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:18:58,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,945 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:18:58,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-02-19 19:18:58,947 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:18:58,966 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:58,982 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:58,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-02-19 19:18:58,984 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:58,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:59,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:59,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:18:59,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:18:59,014 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:18:59,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:18:59,016 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:18:59,217 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 19:18:59,217 INFO L628 ElimStorePlain]: treesize reduction 81, result has 52.4 percent of original size [2021-02-19 19:18:59,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:18:59,223 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-02-19 19:18:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:18:59,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:18:59,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:18:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902882325] [2021-02-19 19:18:59,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:18:59,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:18:59,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:18:59,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:18:59,490 INFO L87 Difference]: Start difference. First operand 1358 states and 4603 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:18:59,686 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 30 [2021-02-19 19:18:59,929 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 33 [2021-02-19 19:19:00,119 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-02-19 19:19:00,372 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-02-19 19:19:00,818 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-02-19 19:19:00,993 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-02-19 19:19:01,252 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-02-19 19:19:01,591 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-02-19 19:19:02,126 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-02-19 19:19:02,515 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 19:19:02,696 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:19:02,987 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 19:19:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:03,088 INFO L93 Difference]: Finished difference Result 1840 states and 6063 transitions. [2021-02-19 19:19:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:19:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:19:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:03,092 INFO L225 Difference]: With dead ends: 1840 [2021-02-19 19:19:03,092 INFO L226 Difference]: Without dead ends: 1811 [2021-02-19 19:19:03,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:19:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-02-19 19:19:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1361. [2021-02-19 19:19:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3926470588235293) internal successors, (4614), 1360 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4614 transitions. [2021-02-19 19:19:03,110 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4614 transitions. Word has length 26 [2021-02-19 19:19:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:03,110 INFO L480 AbstractCegarLoop]: Abstraction has 1361 states and 4614 transitions. [2021-02-19 19:19:03,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4614 transitions. [2021-02-19 19:19:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:03,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:03,113 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:19:03,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1371,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:03,314 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 794800308, now seen corresponding path program 22 times [2021-02-19 19:19:03,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:03,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610100887] [2021-02-19 19:19:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:03,718 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-02-19 19:19:03,899 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-02-19 19:19:04,055 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-02-19 19:19:04,323 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-02-19 19:19:04,458 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-02-19 19:19:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610100887] [2021-02-19 19:19:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648265510] [2021-02-19 19:19:04,462 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 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 [2021-02-19 19:19:04,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:19:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:19:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:05,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,040 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 35 treesize of output 21 [2021-02-19 19:19:05,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:05,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:05,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,051 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 44 treesize of output 26 [2021-02-19 19:19:05,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:05,353 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-02-19 19:19:05,354 INFO L628 ElimStorePlain]: treesize reduction 123, result has 58.0 percent of original size [2021-02-19 19:19:05,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:05,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,361 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 26 treesize of output 16 [2021-02-19 19:19:05,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:05,466 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 19:19:05,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:05,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,473 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 16 treesize of output 10 [2021-02-19 19:19:05,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:05,585 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 19:19:05,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:05,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:05,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,594 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 25 treesize of output 15 [2021-02-19 19:19:05,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:05,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:05,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:05,602 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 34 treesize of output 20 [2021-02-19 19:19:05,604 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:05,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:05,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:19:05,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:74 [2021-02-19 19:19:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:05,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:05,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:19:05,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613649259] [2021-02-19 19:19:05,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:19:05,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:05,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:19:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:19:05,832 INFO L87 Difference]: Start difference. First operand 1361 states and 4614 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-02-19 19:19:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:06,478 INFO L93 Difference]: Finished difference Result 1436 states and 4805 transitions. [2021-02-19 19:19:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:19:06,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 26 [2021-02-19 19:19:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:06,482 INFO L225 Difference]: With dead ends: 1436 [2021-02-19 19:19:06,482 INFO L226 Difference]: Without dead ends: 1421 [2021-02-19 19:19:06,482 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:19:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-02-19 19:19:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1367. [2021-02-19 19:19:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.394582723279649) internal successors, (4637), 1366 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4637 transitions. [2021-02-19 19:19:06,501 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4637 transitions. Word has length 26 [2021-02-19 19:19:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:06,501 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4637 transitions. [2021-02-19 19:19:06,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-02-19 19:19:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4637 transitions. [2021-02-19 19:19:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:06,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:06,503 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:19:06,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1410,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:06,705 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:06,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1929341388, now seen corresponding path program 23 times [2021-02-19 19:19:06,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:06,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363890261] [2021-02-19 19:19:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:07,171 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-02-19 19:19:07,473 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-02-19 19:19:07,739 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-02-19 19:19:07,945 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-02-19 19:19:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:08,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363890261] [2021-02-19 19:19:08,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472692786] [2021-02-19 19:19:08,069 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 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 [2021-02-19 19:19:08,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:19:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:19:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,468 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:19:08,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 19:19:08,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-02-19 19:19:08,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:19:08,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:08,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:19:08,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,547 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-02-19 19:19:08,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,571 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 19:19:08,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-02-19 19:19:08,573 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:08,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:19:08,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,619 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:19:08,621 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 19:19:08,639 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,656 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:19:08,658 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,675 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:19:08,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 19:19:08,697 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,714 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-02-19 19:19:08,716 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-02-19 19:19:08,735 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,753 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:19:08,754 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:08,764 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:08,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:19:08,765 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:08,900 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-02-19 19:19:08,900 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-02-19 19:19:08,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:19:08,902 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-02-19 19:19:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:09,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:09,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:19:09,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058316463] [2021-02-19 19:19:09,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:19:09,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:19:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:19:09,131 INFO L87 Difference]: Start difference. First operand 1367 states and 4637 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:09,624 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-02-19 19:19:09,768 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2021-02-19 19:19:10,186 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-02-19 19:19:10,638 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2021-02-19 19:19:10,904 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:19:11,150 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-02-19 19:19:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:11,238 INFO L93 Difference]: Finished difference Result 1832 states and 6045 transitions. [2021-02-19 19:19:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:19:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:19:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:11,242 INFO L225 Difference]: With dead ends: 1832 [2021-02-19 19:19:11,242 INFO L226 Difference]: Without dead ends: 1807 [2021-02-19 19:19:11,242 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:19:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-02-19 19:19:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1374. [2021-02-19 19:19:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.3991260014566644) internal successors, (4667), 1373 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4667 transitions. [2021-02-19 19:19:11,261 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4667 transitions. Word has length 26 [2021-02-19 19:19:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:11,261 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4667 transitions. [2021-02-19 19:19:11,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4667 transitions. [2021-02-19 19:19:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:11,263 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:11,263 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:19:11,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1421 [2021-02-19 19:19:11,465 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash 260765396, now seen corresponding path program 24 times [2021-02-19 19:19:11,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:11,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089971597] [2021-02-19 19:19:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:11,818 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-02-19 19:19:12,042 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-02-19 19:19:12,225 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 19:19:12,346 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 19:19:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089971597] [2021-02-19 19:19:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088473115] [2021-02-19 19:19:12,520 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:12,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:19:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:12,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:19:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:13,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:13,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-02-19 19:19:13,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:13,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 39 [2021-02-19 19:19:13,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,118 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2021-02-19 19:19:13,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 37 [2021-02-19 19:19:13,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,160 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 44 [2021-02-19 19:19:13,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,186 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:19:13,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-02-19 19:19:13,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2021-02-19 19:19:13,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:13,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 54 [2021-02-19 19:19:13,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,260 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 1 [2021-02-19 19:19:13,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2021-02-19 19:19:13,283 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,305 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2021-02-19 19:19:13,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,327 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2021-02-19 19:19:13,329 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,348 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2021-02-19 19:19:13,349 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2021-02-19 19:19:13,371 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,390 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:13,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2021-02-19 19:19:13,391 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:13,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-02-19 19:19:13,410 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:13,631 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:19:13,632 INFO L628 ElimStorePlain]: treesize reduction 87, result has 51.7 percent of original size [2021-02-19 19:19:13,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:19:13,634 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1061, output treesize:93 [2021-02-19 19:19:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:13,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:13,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:19:13,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66500730] [2021-02-19 19:19:13,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:19:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:19:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:19:13,895 INFO L87 Difference]: Start difference. First operand 1374 states and 4667 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:14,194 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-02-19 19:19:14,900 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-02-19 19:19:15,260 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 19:19:15,513 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 19:19:15,750 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2021-02-19 19:19:16,238 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 19:19:16,555 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-02-19 19:19:16,927 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-02-19 19:19:17,283 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 19:19:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:17,419 INFO L93 Difference]: Finished difference Result 1852 states and 6149 transitions. [2021-02-19 19:19:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:19:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:19:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:17,423 INFO L225 Difference]: With dead ends: 1852 [2021-02-19 19:19:17,423 INFO L226 Difference]: Without dead ends: 1833 [2021-02-19 19:19:17,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:19:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-02-19 19:19:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1386. [2021-02-19 19:19:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-02-19 19:19:17,451 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-02-19 19:19:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:17,451 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-02-19 19:19:17,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-02-19 19:19:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:17,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:17,454 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:19:17,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1433 [2021-02-19 19:19:17,670 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:17,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1248257008, now seen corresponding path program 25 times [2021-02-19 19:19:17,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:17,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281268083] [2021-02-19 19:19:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:17,980 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-02-19 19:19:18,110 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 19:19:18,321 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 19:19:18,463 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 19:19:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:18,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281268083] [2021-02-19 19:19:18,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780910151] [2021-02-19 19:19:18,600 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 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 [2021-02-19 19:19:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:18,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:19:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:18,984 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 19:19:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:19,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:19:19,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:19,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:19,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:19:19,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 19:19:19,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:19,641 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 19:19:19,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:19,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:19,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-02-19 19:19:19,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:19,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:19,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-02-19 19:19:19,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:20,402 WARN L202 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-02-19 19:19:20,403 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-02-19 19:19:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:20,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:20,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-02-19 19:19:20,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:20,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:19:20,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:19:20,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:20,647 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 19:19:20,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:20,671 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:19:20,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 19:19:20,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:20,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:20,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-02-19 19:19:20,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:20,979 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-02-19 19:19:20,980 INFO L628 ElimStorePlain]: treesize reduction 28, result has 86.5 percent of original size [2021-02-19 19:19:20,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 19:19:20,990 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-02-19 19:19:21,228 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:19:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:21,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:21,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:19:21,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775071247] [2021-02-19 19:19:21,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:19:21,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:21,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:19:21,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:19:21,430 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:19:21,672 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 31 [2021-02-19 19:19:22,270 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:19:22,575 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-02-19 19:19:22,866 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:19:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:23,298 INFO L93 Difference]: Finished difference Result 1864 states and 6185 transitions. [2021-02-19 19:19:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:19:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-02-19 19:19:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:23,302 INFO L225 Difference]: With dead ends: 1864 [2021-02-19 19:19:23,302 INFO L226 Difference]: Without dead ends: 1839 [2021-02-19 19:19:23,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:19:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-02-19 19:19:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1386. [2021-02-19 19:19:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-02-19 19:19:23,321 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-02-19 19:19:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:23,322 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-02-19 19:19:23,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-02-19 19:19:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-02-19 19:19:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:23,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:23,323 INFO L506 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] [2021-02-19 19:19:23,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1446 [2021-02-19 19:19:23,524 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1672941520, now seen corresponding path program 42 times [2021-02-19 19:19:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:23,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421865938] [2021-02-19 19:19:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:23,847 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-02-19 19:19:24,043 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-02-19 19:19:24,205 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-02-19 19:19:24,381 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2021-02-19 19:19:24,547 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 19:19:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:24,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421865938] [2021-02-19 19:19:24,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533770900] [2021-02-19 19:19:24,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:24,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:19:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:19:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,686 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 25 [2021-02-19 19:19:25,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,705 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 40 treesize of output 20 [2021-02-19 19:19:25,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,723 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 39 treesize of output 18 [2021-02-19 19:19:25,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,741 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 44 treesize of output 14 [2021-02-19 19:19:25,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,759 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 47 treesize of output 25 [2021-02-19 19:19:25,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,777 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 39 treesize of output 18 [2021-02-19 19:19:25,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,794 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 55 treesize of output 24 [2021-02-19 19:19:25,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,810 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 64 treesize of output 24 [2021-02-19 19:19:25,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,828 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 56 treesize of output 28 [2021-02-19 19:19:25,830 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,846 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 43 treesize of output 23 [2021-02-19 19:19:25,847 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,864 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 52 treesize of output 28 [2021-02-19 19:19:25,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,884 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 34 treesize of output 12 [2021-02-19 19:19:25,886 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20 [2021-02-19 19:19:25,903 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,918 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 45 treesize of output 23 [2021-02-19 19:19:25,919 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,932 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 53 treesize of output 24 [2021-02-19 19:19:25,933 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:25,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:25,939 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 44 treesize of output 18 [2021-02-19 19:19:25,941 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:26,034 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-02-19 19:19:26,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:19:26,036 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-02-19 19:19:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:26,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:26,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:19:26,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144147744] [2021-02-19 19:19:26,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:19:26,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:19:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:19:26,101 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-02-19 19:19:26,813 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-02-19 19:19:27,025 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2021-02-19 19:19:27,305 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-02-19 19:19:27,606 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-02-19 19:19:27,761 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2021-02-19 19:19:28,565 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 19:19:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:28,736 INFO L93 Difference]: Finished difference Result 1835 states and 6041 transitions. [2021-02-19 19:19:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:19:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-02-19 19:19:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:28,741 INFO L225 Difference]: With dead ends: 1835 [2021-02-19 19:19:28,741 INFO L226 Difference]: Without dead ends: 1809 [2021-02-19 19:19:28,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:19:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-02-19 19:19:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1410. [2021-02-19 19:19:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3924769339957415) internal successors, (4780), 1409 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4780 transitions. [2021-02-19 19:19:28,763 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4780 transitions. Word has length 26 [2021-02-19 19:19:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:28,763 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4780 transitions. [2021-02-19 19:19:28,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-02-19 19:19:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4780 transitions. [2021-02-19 19:19:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:28,765 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:28,765 INFO L506 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] [2021-02-19 19:19:28,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1475,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:28,966 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash -605066956, now seen corresponding path program 43 times [2021-02-19 19:19:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:28,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10649586] [2021-02-19 19:19:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:29,295 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 19:19:29,479 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 19:19:29,614 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-19 19:19:29,754 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-02-19 19:19:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:29,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10649586] [2021-02-19 19:19:29,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282465032] [2021-02-19 19:19:29,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:29,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:19:29,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:30,522 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 19:19:30,664 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_62, v_prenex_66], 6=[A, v_prenex_64]} [2021-02-19 19:19:30,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:30,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:30,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:30,678 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 41 treesize of output 21 [2021-02-19 19:19:30,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:30,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:30,689 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 34 treesize of output 15 [2021-02-19 19:19:30,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:30,954 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-02-19 19:19:30,955 INFO L628 ElimStorePlain]: treesize reduction 217, result has 46.0 percent of original size [2021-02-19 19:19:30,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:30,962 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 39 treesize of output 21 [2021-02-19 19:19:30,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:31,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:31,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:31,054 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 34 treesize of output 18 [2021-02-19 19:19:31,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:31,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:31,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:31,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:31,140 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 57 treesize of output 29 [2021-02-19 19:19:31,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:31,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:31,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:19:31,212 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-02-19 19:19:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:31,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:31,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 19:19:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422588735] [2021-02-19 19:19:31,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:19:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:19:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:19:31,332 INFO L87 Difference]: Start difference. First operand 1410 states and 4780 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-02-19 19:19:31,870 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-02-19 19:19:32,209 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 19:19:32,350 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2021-02-19 19:19:32,687 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 19:19:32,975 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2021-02-19 19:19:33,443 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2021-02-19 19:19:33,645 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 19:19:33,859 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-02-19 19:19:34,347 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 19:19:34,775 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-19 19:19:35,051 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-02-19 19:19:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:35,114 INFO L93 Difference]: Finished difference Result 1986 states and 6557 transitions. [2021-02-19 19:19:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:19:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-02-19 19:19:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:35,119 INFO L225 Difference]: With dead ends: 1986 [2021-02-19 19:19:35,119 INFO L226 Difference]: Without dead ends: 1971 [2021-02-19 19:19:35,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:19:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-02-19 19:19:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1410. [2021-02-19 19:19:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3924769339957415) internal successors, (4780), 1409 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4780 transitions. [2021-02-19 19:19:35,137 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4780 transitions. Word has length 26 [2021-02-19 19:19:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:35,137 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4780 transitions. [2021-02-19 19:19:35,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-02-19 19:19:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4780 transitions. [2021-02-19 19:19:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:35,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:35,139 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:19:35,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1589 [2021-02-19 19:19:35,340 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1193442380, now seen corresponding path program 26 times [2021-02-19 19:19:35,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:35,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364612435] [2021-02-19 19:19:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:35,665 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 19:19:35,859 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-02-19 19:19:35,989 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 19:19:36,124 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 19:19:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:36,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364612435] [2021-02-19 19:19:36,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327977074] [2021-02-19 19:19:36,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:36,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:19:36,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:19:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,771 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-02-19 19:19:36,771 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-02-19 19:19:36,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,809 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:19:36,810 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 47 [2021-02-19 19:19:36,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,855 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:19:36,856 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-02-19 19:19:36,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,880 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:36,881 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-02-19 19:19:36,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,923 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:19:36,923 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-02-19 19:19:36,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,950 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:36,950 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-02-19 19:19:36,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:36,982 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-02-19 19:19:36,983 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-02-19 19:19:36,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,007 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,007 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-02-19 19:19:37,009 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,047 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 19:19:37,047 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-02-19 19:19:37,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,073 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,073 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-02-19 19:19:37,075 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,102 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,102 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-02-19 19:19:37,104 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,130 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,131 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-02-19 19:19:37,132 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,155 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,155 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-02-19 19:19:37,157 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,183 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,183 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-02-19 19:19:37,185 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:37,206 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 19:19:37,207 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-02-19 19:19:37,208 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,217 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-02-19 19:19:37,217 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 55 [2021-02-19 19:19:37,219 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:37,491 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 19:19:37,492 INFO L628 ElimStorePlain]: treesize reduction 85, result has 48.5 percent of original size [2021-02-19 19:19:37,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:19:37,494 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-02-19 19:19:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:37,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:37,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:19:37,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712914906] [2021-02-19 19:19:37,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:19:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:19:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:19:37,755 INFO L87 Difference]: Start difference. First operand 1410 states and 4780 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:38,054 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 19:19:38,435 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2021-02-19 19:19:38,949 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-02-19 19:19:39,341 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 37 [2021-02-19 19:19:39,645 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 19:19:40,070 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-02-19 19:19:40,504 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-02-19 19:19:40,937 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-02-19 19:19:41,233 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-02-19 19:19:41,679 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-02-19 19:19:42,057 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-02-19 19:19:42,503 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 19:19:42,775 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-02-19 19:19:43,148 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-02-19 19:19:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:43,322 INFO L93 Difference]: Finished difference Result 2016 states and 6570 transitions. [2021-02-19 19:19:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:19:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:19:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:43,327 INFO L225 Difference]: With dead ends: 2016 [2021-02-19 19:19:43,327 INFO L226 Difference]: Without dead ends: 1997 [2021-02-19 19:19:43,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:19:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-02-19 19:19:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1419. [2021-02-19 19:19:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3928067700987308) internal successors, (4811), 1418 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4811 transitions. [2021-02-19 19:19:43,347 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4811 transitions. Word has length 26 [2021-02-19 19:19:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:43,347 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4811 transitions. [2021-02-19 19:19:43,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4811 transitions. [2021-02-19 19:19:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:43,349 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:43,349 INFO L506 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] [2021-02-19 19:19:43,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1603,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:19:43,549 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 356939184, now seen corresponding path program 44 times [2021-02-19 19:19:43,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:43,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657930789] [2021-02-19 19:19:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:43,880 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 19:19:44,098 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-02-19 19:19:44,285 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2021-02-19 19:19:44,428 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-02-19 19:19:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657930789] [2021-02-19 19:19:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340546958] [2021-02-19 19:19:44,605 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 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 [2021-02-19 19:19:44,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:19:44,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 19:19:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:45,288 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 19:19:46,010 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-02-19 19:19:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:46,215 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2021-02-19 19:19:46,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,246 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-02-19 19:19:46,246 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2021-02-19 19:19:46,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:46,563 WARN L202 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 19:19:46,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:46,602 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 44 [2021-02-19 19:19:46,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,637 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-02-19 19:19:46,637 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-02-19 19:19:46,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:46,981 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-02-19 19:19:46,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:46,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:47,018 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-02-19 19:19:47,018 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 35 [2021-02-19 19:19:47,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:47,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:47,048 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-02-19 19:19:47,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:47,683 WARN L202 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-02-19 19:19:47,684 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.9 percent of original size [2021-02-19 19:19:47,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:47,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:47,717 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2021-02-19 19:19:47,720 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:19:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:19:47,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:19:47,738 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-02-19 19:19:47,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:47,966 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 19:19:47,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:19:47,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 19:19:47,974 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:547, output treesize:275 [2021-02-19 19:19:48,186 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 19:19:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:48,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:19:48,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:19:48,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219657182] [2021-02-19 19:19:48,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:19:48,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:19:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:19:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:19:48,295 INFO L87 Difference]: Start difference. First operand 1419 states and 4811 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-02-19 19:19:48,711 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 19:19:49,244 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 19:19:49,393 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 19:19:49,625 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:19:49,897 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-02-19 19:19:50,127 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 19:19:50,420 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 19:19:50,928 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 19:19:51,105 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 19:19:51,336 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-02-19 19:19:51,550 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 19:19:52,281 WARN L202 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2021-02-19 19:19:53,066 WARN L202 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 19:19:53,352 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-02-19 19:19:54,275 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 19:19:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:19:54,387 INFO L93 Difference]: Finished difference Result 2126 states and 6879 transitions. [2021-02-19 19:19:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:19:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-02-19 19:19:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:19:54,391 INFO L225 Difference]: With dead ends: 2126 [2021-02-19 19:19:54,392 INFO L226 Difference]: Without dead ends: 2104 [2021-02-19 19:19:54,392 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:19:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-02-19 19:19:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1433. [2021-02-19 19:19:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.4008379888268156) internal successors, (4870), 1432 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:19:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4870 transitions. [2021-02-19 19:19:54,413 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4870 transitions. Word has length 26 [2021-02-19 19:19:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:19:54,413 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 4870 transitions. [2021-02-19 19:19:54,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-02-19 19:19:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4870 transitions. [2021-02-19 19:19:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:19:54,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:19:54,415 INFO L506 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] [2021-02-19 19:19:54,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1612 [2021-02-19 19:19:54,615 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:19:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:19:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash -619379660, now seen corresponding path program 45 times [2021-02-19 19:19:54,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:19:54,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800166925] [2021-02-19 19:19:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:19:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:19:55,142 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-02-19 19:19:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:19:55,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800166925] [2021-02-19 19:19:55,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123297804] [2021-02-19 19:19:55,479 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 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 [2021-02-19 19:19:55,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:19:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:19:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:19:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:19:55,956 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 19:19:56,456 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 19:19:56,931 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-02-19 19:19:57,770 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-02-19 19:19:58,989 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:19:58,990 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:19:58,990 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 86 [2021-02-19 19:19:59,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:59,481 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 19:19:59,482 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:19:59,482 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 75 [2021-02-19 19:19:59,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:19:59,815 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:19:59,815 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:19:59,816 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 66 [2021-02-19 19:19:59,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:00,112 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:20:00,112 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-02-19 19:20:00,113 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-02-19 19:20:00,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:00,380 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 19:20:00,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:20:00,381 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 95 [2021-02-19 19:20:00,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 13 xjuncts. [2021-02-19 19:20:01,313 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:20:01,314 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-02-19 19:20:01,315 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 70 [2021-02-19 19:20:01,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:01,759 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:20:01,759 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:20:01,760 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 81 [2021-02-19 19:20:01,914 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:02,145 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 19:20:02,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:20:02,146 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 71 [2021-02-19 19:20:02,176 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:02,493 INFO L244 Elim1Store]: Index analysis took 232 ms [2021-02-19 19:20:02,560 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-02-19 19:20:02,560 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 1 [2021-02-19 19:20:02,562 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:02,762 INFO L244 Elim1Store]: Index analysis took 119 ms [2021-02-19 19:20:03,386 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 19:20:03,386 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:20:03,387 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 62 [2021-02-19 19:20:03,411 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:03,834 INFO L244 Elim1Store]: Index analysis took 346 ms [2021-02-19 19:20:03,965 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 1 [2021-02-19 19:20:03,966 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-02-19 19:20:03,966 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 1 [2021-02-19 19:20:03,968 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:04,279 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:20:04,280 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-02-19 19:20:04,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 85 [2021-02-19 19:20:04,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 6 xjuncts. [2021-02-19 19:20:04,923 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:20:04,924 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-02-19 19:20:04,924 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-02-19 19:20:04,984 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:05,415 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 19:20:05,415 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:20:05,416 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 62 [2021-02-19 19:20:05,441 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:05,809 INFO L244 Elim1Store]: Index analysis took 257 ms [2021-02-19 19:20:06,602 WARN L202 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:20:06,603 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:20:06,603 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-02-19 19:20:06,651 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 3 xjuncts. [2021-02-19 19:20:07,359 WARN L202 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 17 [2021-02-19 19:20:07,360 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-02-19 19:20:07,360 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 60 [2021-02-19 19:20:07,364 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:20:31,324 WARN L202 SmtUtils]: Spent 23.96 s on a formula simplification. DAG size of input: 1082 DAG size of output: 490 [2021-02-19 19:20:31,326 INFO L628 ElimStorePlain]: treesize reduction 20158, result has 11.9 percent of original size Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown