/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-proofs/horseshoe-2jV.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:55:17,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:55:17,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:55:17,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:55:17,496 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 19:55:17,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:55:17,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:55:17,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:55:17,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:55:17,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:55:17,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:55:17,518 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:55:17,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:55:17,519 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:55:17,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:55:17,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:55:17,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:55:17,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:55:17,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:55:17,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:55:17,520 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:55:17,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:55:17,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:55:17,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:55:17,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:55:17,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:55:17,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:55:17,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:55:17,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:55:17,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:55:17,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:55:17,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:55:17,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:55:17,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:55:17,523 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:55:17,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:55:17,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:55:17,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:55:17,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:55:17,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:55:17,857 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:55:17,859 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:55:17,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/horseshoe-2jV.wvr.bpl [2021-02-19 19:55:17,860 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/horseshoe-2jV.wvr.bpl' [2021-02-19 19:55:17,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:55:17,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:55:17,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:55:17,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:55:17,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:55:17,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:55:17,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:55:17,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:55:17,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:55:17,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/1) ... [2021-02-19 19:55:17,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:55:17,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:55:17,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:55:17,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:55:17,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (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 19:55:18,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:55:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:55:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:55:18,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:55:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:55:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:55:18,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:55:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:55:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:55:18,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:55:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:55:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:55:18,045 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 19:55:18,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:55:18,246 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:55:18,248 INFO L202 PluginConnector]: Adding new model horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:55:18 BoogieIcfgContainer [2021-02-19 19:55:18,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:55:18,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:55:18,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:55:18,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:55:18,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:55:17" (1/2) ... [2021-02-19 19:55:18,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26428a76 and model type horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:55:18, skipping insertion in model container [2021-02-19 19:55:18,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:55:18" (2/2) ... [2021-02-19 19:55:18,270 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe-2jV.wvr.bpl [2021-02-19 19:55:18,275 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:55:18,275 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:55:18,278 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:55:18,278 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:55:18,346 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 19:55:18,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 19:55:18,390 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:55:18,390 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:55:18,390 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:55:18,390 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:55:18,390 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:55:18,391 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:55:18,391 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:55:18,391 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:55:18,398 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-02-19 19:55:18,426 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 19:55:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 19:55:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 19:55:18,439 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:18,440 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:18,440 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:18,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1962263573, now seen corresponding path program 1 times [2021-02-19 19:55:18,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:18,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920595524] [2021-02-19 19:55:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:18,551 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 19:55:18,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920595524] [2021-02-19 19:55:18,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:55:18,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:55:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251115582] [2021-02-19 19:55:18,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:55:18,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:55:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:55:18,570 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:18,602 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2021-02-19 19:55:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:55:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 19:55:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:18,617 INFO L225 Difference]: With dead ends: 401 [2021-02-19 19:55:18,617 INFO L226 Difference]: Without dead ends: 401 [2021-02-19 19:55:18,618 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:55:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-02-19 19:55:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-02-19 19:55:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 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 19:55:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2021-02-19 19:55:18,682 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2021-02-19 19:55:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:18,682 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2021-02-19 19:55:18,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2021-02-19 19:55:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:55:18,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:18,686 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] [2021-02-19 19:55:18,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:55:18,686 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1882350125, now seen corresponding path program 1 times [2021-02-19 19:55:18,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:18,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930595115] [2021-02-19 19:55:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:18,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930595115] [2021-02-19 19:55:18,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:55:18,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:55:18,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786702497] [2021-02-19 19:55:18,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:55:18,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:55:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:55:18,730 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:18,748 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2021-02-19 19:55:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:55:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 19:55:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:18,753 INFO L225 Difference]: With dead ends: 458 [2021-02-19 19:55:18,753 INFO L226 Difference]: Without dead ends: 458 [2021-02-19 19:55:18,754 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:55:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-02-19 19:55:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-02-19 19:55:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 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 19:55:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2021-02-19 19:55:18,781 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2021-02-19 19:55:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:18,781 INFO L480 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2021-02-19 19:55:18,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2021-02-19 19:55:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:55:18,784 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:18,784 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, 1] [2021-02-19 19:55:18,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:55:18,785 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1665035728, now seen corresponding path program 1 times [2021-02-19 19:55:18,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:18,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517911252] [2021-02-19 19:55:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517911252] [2021-02-19 19:55:18,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:55:18,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:55:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448326295] [2021-02-19 19:55:18,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:55:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:18,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:55:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:55:18,825 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:18,834 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2021-02-19 19:55:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:55:18,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:55:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:18,845 INFO L225 Difference]: With dead ends: 463 [2021-02-19 19:55:18,846 INFO L226 Difference]: Without dead ends: 463 [2021-02-19 19:55:18,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:55:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-02-19 19:55:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-02-19 19:55:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 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 19:55:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-02-19 19:55:18,868 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2021-02-19 19:55:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:18,868 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-02-19 19:55:18,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-02-19 19:55:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:55:18,875 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:18,876 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, 1] [2021-02-19 19:55:18,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 19:55:18,876 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -213390526, now seen corresponding path program 2 times [2021-02-19 19:55:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:18,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70747665] [2021-02-19 19:55:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:19,183 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 19:55:19,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70747665] [2021-02-19 19:55:19,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257700411] [2021-02-19 19:55:19,184 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 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 19:55:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:55:19,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:55:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:19,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 19:55:19,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:19,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:19,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:19,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-02-19 19:55:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 19:55:19,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:19,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:19,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:19,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-02-19 19:55:19,772 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 19:55:19,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:19,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-02-19 19:55:19,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763110623] [2021-02-19 19:55:19,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:55:19,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:19,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:55:19,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:55:19,775 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 19:55:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:20,788 INFO L93 Difference]: Finished difference Result 1470 states and 4324 transitions. [2021-02-19 19:55:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:55:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 25 [2021-02-19 19:55:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:20,798 INFO L225 Difference]: With dead ends: 1470 [2021-02-19 19:55:20,798 INFO L226 Difference]: Without dead ends: 1408 [2021-02-19 19:55:20,799 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:55:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-02-19 19:55:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 637. [2021-02-19 19:55:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9276729559748427) internal successors, (1862), 636 states have internal predecessors, (1862), 0 states have call successors, (0), 0 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 19:55:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1862 transitions. [2021-02-19 19:55:20,826 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1862 transitions. Word has length 25 [2021-02-19 19:55:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:20,826 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 1862 transitions. [2021-02-19 19:55:20,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 19:55:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1862 transitions. [2021-02-19 19:55:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:55:20,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:20,828 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, 1] [2021-02-19 19:55:21,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:21,050 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1482915714, now seen corresponding path program 3 times [2021-02-19 19:55:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:21,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962947750] [2021-02-19 19:55:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:21,229 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 19:55:21,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962947750] [2021-02-19 19:55:21,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071420307] [2021-02-19 19:55:21,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:21,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:55:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:21,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:55:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:21,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 19:55:21,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:21,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:21,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:21,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-02-19 19:55:21,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 19:55:21,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:21,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:21,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:21,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-02-19 19:55:21,614 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 19:55:21,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:21,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-02-19 19:55:21,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816695034] [2021-02-19 19:55:21,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:55:21,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:55:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:55:21,617 INFO L87 Difference]: Start difference. First operand 637 states and 1862 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:22,400 INFO L93 Difference]: Finished difference Result 1386 states and 3964 transitions. [2021-02-19 19:55:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:55:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:55:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:22,409 INFO L225 Difference]: With dead ends: 1386 [2021-02-19 19:55:22,410 INFO L226 Difference]: Without dead ends: 1334 [2021-02-19 19:55:22,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:55:22,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-02-19 19:55:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 755. [2021-02-19 19:55:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.8779840848806364) internal successors, (2170), 754 states have internal predecessors, (2170), 0 states have call successors, (0), 0 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 19:55:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2170 transitions. [2021-02-19 19:55:22,437 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2170 transitions. Word has length 25 [2021-02-19 19:55:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:22,438 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2170 transitions. [2021-02-19 19:55:22,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2170 transitions. [2021-02-19 19:55:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:55:22,440 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:22,440 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, 1, 1, 1, 1] [2021-02-19 19:55:22,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:22,662 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash -896423655, now seen corresponding path program 1 times [2021-02-19 19:55:22,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:22,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262334069] [2021-02-19 19:55:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:22,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262334069] [2021-02-19 19:55:22,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537661680] [2021-02-19 19:55:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 19:55:22,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:22,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:55:22,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:22,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:22,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:22,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 19:55:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:22,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:22,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-02-19 19:55:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018665922] [2021-02-19 19:55:22,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:55:22,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:55:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:55:22,853 INFO L87 Difference]: Start difference. First operand 755 states and 2170 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:22,985 INFO L93 Difference]: Finished difference Result 2048 states and 6106 transitions. [2021-02-19 19:55:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:55:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:55:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:22,995 INFO L225 Difference]: With dead ends: 2048 [2021-02-19 19:55:22,995 INFO L226 Difference]: Without dead ends: 2048 [2021-02-19 19:55:22,996 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:55:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-02-19 19:55:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1495. [2021-02-19 19:55:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.9571619812583667) internal successors, (4418), 1494 states have internal predecessors, (4418), 0 states have call successors, (0), 0 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 19:55:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 4418 transitions. [2021-02-19 19:55:23,037 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 4418 transitions. Word has length 28 [2021-02-19 19:55:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:23,038 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 4418 transitions. [2021-02-19 19:55:23,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 4418 transitions. [2021-02-19 19:55:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:55:23,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:23,041 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, 1, 1, 1] [2021-02-19 19:55:23,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:23,254 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1973782405, now seen corresponding path program 4 times [2021-02-19 19:55:23,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:23,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072423208] [2021-02-19 19:55:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:23,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072423208] [2021-02-19 19:55:23,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817011342] [2021-02-19 19:55:23,318 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 19:55:23,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:55:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:55:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:55:23,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 19:55:23,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-02-19 19:55:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351671827] [2021-02-19 19:55:23,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:55:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:55:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:55:23,434 INFO L87 Difference]: Start difference. First operand 1495 states and 4418 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:23,460 INFO L93 Difference]: Finished difference Result 3564 states and 10524 transitions. [2021-02-19 19:55:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:55:23,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:55:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:23,476 INFO L225 Difference]: With dead ends: 3564 [2021-02-19 19:55:23,478 INFO L226 Difference]: Without dead ends: 3498 [2021-02-19 19:55:23,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:55:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-02-19 19:55:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2784. [2021-02-19 19:55:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 3.0790513833992095) internal successors, (8569), 2783 states have internal predecessors, (8569), 0 states have call successors, (0), 0 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 19:55:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 8569 transitions. [2021-02-19 19:55:23,596 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 8569 transitions. Word has length 29 [2021-02-19 19:55:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:23,598 INFO L480 AbstractCegarLoop]: Abstraction has 2784 states and 8569 transitions. [2021-02-19 19:55:23,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 8569 transitions. [2021-02-19 19:55:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 19:55:23,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:23,610 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:23,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:23,832 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1947722728, now seen corresponding path program 5 times [2021-02-19 19:55:23,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:23,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822429568] [2021-02-19 19:55:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822429568] [2021-02-19 19:55:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258840467] [2021-02-19 19:55:23,892 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 19:55:23,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:55:23,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:55:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:24,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 19:55:24,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-02-19 19:55:24,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389992945] [2021-02-19 19:55:24,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:55:24,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:55:24,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:55:24,010 INFO L87 Difference]: Start difference. First operand 2784 states and 8569 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:24,035 INFO L93 Difference]: Finished difference Result 3446 states and 10298 transitions. [2021-02-19 19:55:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:55:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 19:55:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:24,051 INFO L225 Difference]: With dead ends: 3446 [2021-02-19 19:55:24,051 INFO L226 Difference]: Without dead ends: 3283 [2021-02-19 19:55:24,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:55:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-02-19 19:55:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 3178. [2021-02-19 19:55:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 3.0387157695939564) internal successors, (9654), 3177 states have internal predecessors, (9654), 0 states have call successors, (0), 0 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 19:55:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 9654 transitions. [2021-02-19 19:55:24,144 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 9654 transitions. Word has length 30 [2021-02-19 19:55:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:24,144 INFO L480 AbstractCegarLoop]: Abstraction has 3178 states and 9654 transitions. [2021-02-19 19:55:24,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 9654 transitions. [2021-02-19 19:55:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:55:24,152 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:24,152 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:24,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:24,366 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:24,366 INFO L82 PathProgramCache]: Analyzing trace with hash -156815063, now seen corresponding path program 2 times [2021-02-19 19:55:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:24,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155240129] [2021-02-19 19:55:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:55:24,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155240129] [2021-02-19 19:55:24,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064424282] [2021-02-19 19:55:24,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:24,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:55:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 19:55:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 19:55:24,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:24,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:24,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:24,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-02-19 19:55:24,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:55:24,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:24,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:24,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:24,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 19:55:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:55:24,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:24,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:55:24,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100721575] [2021-02-19 19:55:24,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:55:24,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:55:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:55:24,622 INFO L87 Difference]: Start difference. First operand 3178 states and 9654 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:24,826 INFO L93 Difference]: Finished difference Result 5522 states and 16468 transitions. [2021-02-19 19:55:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:55:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:55:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:24,860 INFO L225 Difference]: With dead ends: 5522 [2021-02-19 19:55:24,861 INFO L226 Difference]: Without dead ends: 5522 [2021-02-19 19:55:24,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:55:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2021-02-19 19:55:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 5027. [2021-02-19 19:55:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5026 states have (on average 3.009550338241146) internal successors, (15126), 5026 states have internal predecessors, (15126), 0 states have call successors, (0), 0 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 19:55:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 15126 transitions. [2021-02-19 19:55:25,069 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 15126 transitions. Word has length 33 [2021-02-19 19:55:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:25,069 INFO L480 AbstractCegarLoop]: Abstraction has 5027 states and 15126 transitions. [2021-02-19 19:55:25,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 15126 transitions. [2021-02-19 19:55:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:25,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:25,084 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:25,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:25,307 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -575752004, now seen corresponding path program 3 times [2021-02-19 19:55:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:25,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554362999] [2021-02-19 19:55:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:25,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554362999] [2021-02-19 19:55:25,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880769149] [2021-02-19 19:55:25,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:55:25,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:55:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:55:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:26,309 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:26,309 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 38 treesize of output 22 [2021-02-19 19:55:26,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:26,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:26,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:26,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:24 [2021-02-19 19:55:26,386 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:26,386 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 27 treesize of output 15 [2021-02-19 19:55:26,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:26,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:26,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:26,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-02-19 19:55:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:26,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:26,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-02-19 19:55:26,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139417171] [2021-02-19 19:55:26,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:55:26,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:26,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:55:26,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:55:26,548 INFO L87 Difference]: Start difference. First operand 5027 states and 15126 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:29,402 INFO L93 Difference]: Finished difference Result 7847 states and 22961 transitions. [2021-02-19 19:55:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 19:55:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:29,424 INFO L225 Difference]: With dead ends: 7847 [2021-02-19 19:55:29,424 INFO L226 Difference]: Without dead ends: 7693 [2021-02-19 19:55:29,426 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=566, Invalid=5440, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 19:55:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-02-19 19:55:29,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 5251. [2021-02-19 19:55:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5251 states, 5250 states have (on average 2.989904761904762) internal successors, (15697), 5250 states have internal predecessors, (15697), 0 states have call successors, (0), 0 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 19:55:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5251 states to 5251 states and 15697 transitions. [2021-02-19 19:55:29,583 INFO L78 Accepts]: Start accepts. Automaton has 5251 states and 15697 transitions. Word has length 37 [2021-02-19 19:55:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:29,585 INFO L480 AbstractCegarLoop]: Abstraction has 5251 states and 15697 transitions. [2021-02-19 19:55:29,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5251 states and 15697 transitions. [2021-02-19 19:55:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:29,620 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:29,620 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:29,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:55:29,834 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 938397274, now seen corresponding path program 4 times [2021-02-19 19:55:29,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:29,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607925231] [2021-02-19 19:55:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:30,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607925231] [2021-02-19 19:55:30,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839236228] [2021-02-19 19:55:30,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:30,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:55:30,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:55:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:30,726 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:30,726 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 25 treesize of output 13 [2021-02-19 19:55:30,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:30,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:30,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:30,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:55:30,818 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:30,819 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 17 [2021-02-19 19:55:30,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:30,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:30,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:30,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:55:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:31,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:31,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:55:31,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993681652] [2021-02-19 19:55:31,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:55:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:55:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:55:31,086 INFO L87 Difference]: Start difference. First operand 5251 states and 15697 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:34,584 INFO L93 Difference]: Finished difference Result 8722 states and 25489 transitions. [2021-02-19 19:55:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:55:34,585 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:34,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:34,606 INFO L225 Difference]: With dead ends: 8722 [2021-02-19 19:55:34,606 INFO L226 Difference]: Without dead ends: 8535 [2021-02-19 19:55:34,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=551, Invalid=5611, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 19:55:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8535 states. [2021-02-19 19:55:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8535 to 5421. [2021-02-19 19:55:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5421 states, 5420 states have (on average 2.98450184501845) internal successors, (16176), 5420 states have internal predecessors, (16176), 0 states have call successors, (0), 0 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 19:55:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 16176 transitions. [2021-02-19 19:55:34,753 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 16176 transitions. Word has length 37 [2021-02-19 19:55:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:34,753 INFO L480 AbstractCegarLoop]: Abstraction has 5421 states and 16176 transitions. [2021-02-19 19:55:34,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 16176 transitions. [2021-02-19 19:55:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:34,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:34,764 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:34,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 19:55:34,978 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1660263782, now seen corresponding path program 5 times [2021-02-19 19:55:34,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:34,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280412793] [2021-02-19 19:55:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:35,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280412793] [2021-02-19 19:55:35,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675156622] [2021-02-19 19:55:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:35,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:55:35,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:35,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:55:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:35,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:35,897 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 25 treesize of output 13 [2021-02-19 19:55:35,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:35,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:35,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:35,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-02-19 19:55:36,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:55:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:55:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:55:36,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:55:36,022 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 29 treesize of output 17 [2021-02-19 19:55:36,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:36,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:36,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:36,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:20 [2021-02-19 19:55:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:36,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:36,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-02-19 19:55:36,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143648033] [2021-02-19 19:55:36,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:55:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:36,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:55:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:55:36,332 INFO L87 Difference]: Start difference. First operand 5421 states and 16176 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:38,873 INFO L93 Difference]: Finished difference Result 6169 states and 18175 transitions. [2021-02-19 19:55:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:55:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:38,888 INFO L225 Difference]: With dead ends: 6169 [2021-02-19 19:55:38,888 INFO L226 Difference]: Without dead ends: 6018 [2021-02-19 19:55:38,889 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=2660, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:55:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-02-19 19:55:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 5504. [2021-02-19 19:55:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5504 states, 5503 states have (on average 2.9765582409594766) internal successors, (16380), 5503 states have internal predecessors, (16380), 0 states have call successors, (0), 0 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 19:55:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5504 states to 5504 states and 16380 transitions. [2021-02-19 19:55:39,034 INFO L78 Accepts]: Start accepts. Automaton has 5504 states and 16380 transitions. Word has length 37 [2021-02-19 19:55:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:39,035 INFO L480 AbstractCegarLoop]: Abstraction has 5504 states and 16380 transitions. [2021-02-19 19:55:39,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5504 states and 16380 transitions. [2021-02-19 19:55:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:39,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:39,044 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:39,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:39,267 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash 509636246, now seen corresponding path program 6 times [2021-02-19 19:55:39,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:39,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338994683] [2021-02-19 19:55:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338994683] [2021-02-19 19:55:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677611195] [2021-02-19 19:55:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:39,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:55:39,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:55:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:40,070 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:55:40,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-02-19 19:55:40,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:40,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:40,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:40,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:55:40,296 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:40,296 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 17 [2021-02-19 19:55:40,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:40,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:40,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:40,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:55:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:40,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:40,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-02-19 19:55:40,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20472465] [2021-02-19 19:55:40,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:55:40,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:55:40,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:55:40,432 INFO L87 Difference]: Start difference. First operand 5504 states and 16380 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:43,532 INFO L93 Difference]: Finished difference Result 8595 states and 25020 transitions. [2021-02-19 19:55:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 19:55:43,533 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:43,550 INFO L225 Difference]: With dead ends: 8595 [2021-02-19 19:55:43,550 INFO L226 Difference]: Without dead ends: 8455 [2021-02-19 19:55:43,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=542, Invalid=5938, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:55:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-02-19 19:55:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 5543. [2021-02-19 19:55:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5543 states, 5542 states have (on average 2.9756405629736555) internal successors, (16491), 5542 states have internal predecessors, (16491), 0 states have call successors, (0), 0 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 19:55:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5543 states to 5543 states and 16491 transitions. [2021-02-19 19:55:43,682 INFO L78 Accepts]: Start accepts. Automaton has 5543 states and 16491 transitions. Word has length 37 [2021-02-19 19:55:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:43,682 INFO L480 AbstractCegarLoop]: Abstraction has 5543 states and 16491 transitions. [2021-02-19 19:55:43,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5543 states and 16491 transitions. [2021-02-19 19:55:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:43,693 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:43,693 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:43,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:55:43,916 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1234727760, now seen corresponding path program 7 times [2021-02-19 19:55:43,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:43,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030687167] [2021-02-19 19:55:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:44,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030687167] [2021-02-19 19:55:44,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443280886] [2021-02-19 19:55:44,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:44,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:55:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:44,703 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:55:44,703 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 31 treesize of output 15 [2021-02-19 19:55:44,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:44,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:44,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:44,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:55:44,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:44,951 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 17 [2021-02-19 19:55:44,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:44,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:44,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:44,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:55:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:45,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:45,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:55:45,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620832559] [2021-02-19 19:55:45,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:55:45,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:45,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:55:45,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:55:45,265 INFO L87 Difference]: Start difference. First operand 5543 states and 16491 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:49,045 INFO L93 Difference]: Finished difference Result 9384 states and 27346 transitions. [2021-02-19 19:55:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:55:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:49,060 INFO L225 Difference]: With dead ends: 9384 [2021-02-19 19:55:49,060 INFO L226 Difference]: Without dead ends: 9197 [2021-02-19 19:55:49,062 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 19:55:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9197 states. [2021-02-19 19:55:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9197 to 5540. [2021-02-19 19:55:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 2.9758079075645423) internal successors, (16483), 5539 states have internal predecessors, (16483), 0 states have call successors, (0), 0 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 19:55:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 16483 transitions. [2021-02-19 19:55:49,227 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 16483 transitions. Word has length 37 [2021-02-19 19:55:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:49,228 INFO L480 AbstractCegarLoop]: Abstraction has 5540 states and 16483 transitions. [2021-02-19 19:55:49,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 16483 transitions. [2021-02-19 19:55:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:49,238 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:49,238 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:49,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 19:55:49,450 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash 461578480, now seen corresponding path program 8 times [2021-02-19 19:55:49,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:49,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266164327] [2021-02-19 19:55:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:49,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266164327] [2021-02-19 19:55:49,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638764356] [2021-02-19 19:55:49,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:49,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:55:49,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:49,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:55:49,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:50,195 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:50,195 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 27 treesize of output 15 [2021-02-19 19:55:50,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:50,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:50,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:50,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:55:50,419 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:50,420 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 17 [2021-02-19 19:55:50,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:50,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:50,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:50,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:55:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:50,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:50,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:55:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696307422] [2021-02-19 19:55:50,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:55:50,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:55:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:55:50,716 INFO L87 Difference]: Start difference. First operand 5540 states and 16483 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:53,693 INFO L93 Difference]: Finished difference Result 6359 states and 18699 transitions. [2021-02-19 19:55:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:55:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:53,701 INFO L225 Difference]: With dead ends: 6359 [2021-02-19 19:55:53,701 INFO L226 Difference]: Without dead ends: 6222 [2021-02-19 19:55:53,702 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:55:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-02-19 19:55:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5550. [2021-02-19 19:55:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 2.9756712921247073) internal successors, (16512), 5549 states have internal predecessors, (16512), 0 states have call successors, (0), 0 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 19:55:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16512 transitions. [2021-02-19 19:55:53,811 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16512 transitions. Word has length 37 [2021-02-19 19:55:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:53,811 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16512 transitions. [2021-02-19 19:55:53,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16512 transitions. [2021-02-19 19:55:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:53,823 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:53,823 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:54,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:55:54,038 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1719134676, now seen corresponding path program 9 times [2021-02-19 19:55:54,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:54,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115321620] [2021-02-19 19:55:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:54,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115321620] [2021-02-19 19:55:54,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643414810] [2021-02-19 19:55:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:54,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:55:54,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:55:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:54,814 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:54,814 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 25 treesize of output 13 [2021-02-19 19:55:54,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:54,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:54,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:54,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:55:55,098 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:55,098 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 30 treesize of output 18 [2021-02-19 19:55:55,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:55,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:55,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:55,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-02-19 19:55:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:55,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:55:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755082455] [2021-02-19 19:55:55,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:55:55,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:55,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:55:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:55:55,340 INFO L87 Difference]: Start difference. First operand 5550 states and 16512 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:58,465 INFO L93 Difference]: Finished difference Result 6332 states and 18636 transitions. [2021-02-19 19:55:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:55:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:55:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:58,475 INFO L225 Difference]: With dead ends: 6332 [2021-02-19 19:55:58,475 INFO L226 Difference]: Without dead ends: 6188 [2021-02-19 19:55:58,476 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:55:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2021-02-19 19:55:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 5561. [2021-02-19 19:55:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5561 states, 5560 states have (on average 2.9758992805755398) internal successors, (16546), 5560 states have internal predecessors, (16546), 0 states have call successors, (0), 0 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 19:55:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5561 states to 5561 states and 16546 transitions. [2021-02-19 19:55:58,576 INFO L78 Accepts]: Start accepts. Automaton has 5561 states and 16546 transitions. Word has length 37 [2021-02-19 19:55:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:58,576 INFO L480 AbstractCegarLoop]: Abstraction has 5561 states and 16546 transitions. [2021-02-19 19:55:58,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:55:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5561 states and 16546 transitions. [2021-02-19 19:55:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:55:58,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:58,584 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:58,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-02-19 19:55:58,806 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2025058240, now seen corresponding path program 10 times [2021-02-19 19:55:58,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:58,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573756143] [2021-02-19 19:55:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:59,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573756143] [2021-02-19 19:55:59,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647560116] [2021-02-19 19:55:59,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:59,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:55:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:55:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:59,712 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:55:59,712 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 13 [2021-02-19 19:55:59,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:59,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:59,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:59,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-02-19 19:55:59,934 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:55:59,934 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 17 [2021-02-19 19:55:59,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:55:59,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:55:59,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:55:59,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:00,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:00,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:56:00,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931180450] [2021-02-19 19:56:00,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:56:00,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:00,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:56:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:56:00,172 INFO L87 Difference]: Start difference. First operand 5561 states and 16546 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:03,758 INFO L93 Difference]: Finished difference Result 9478 states and 27628 transitions. [2021-02-19 19:56:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:56:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:03,772 INFO L225 Difference]: With dead ends: 9478 [2021-02-19 19:56:03,772 INFO L226 Difference]: Without dead ends: 9291 [2021-02-19 19:56:03,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=570, Invalid=7262, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 19:56:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9291 states. [2021-02-19 19:56:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9291 to 5558. [2021-02-19 19:56:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5557 states have (on average 2.9760662227820767) internal successors, (16538), 5557 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:56:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 16538 transitions. [2021-02-19 19:56:03,883 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 16538 transitions. Word has length 37 [2021-02-19 19:56:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:03,884 INFO L480 AbstractCegarLoop]: Abstraction has 5558 states and 16538 transitions. [2021-02-19 19:56:03,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 16538 transitions. [2021-02-19 19:56:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:03,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:03,893 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:04,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:04,114 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -573602816, now seen corresponding path program 11 times [2021-02-19 19:56:04,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:04,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631416450] [2021-02-19 19:56:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631416450] [2021-02-19 19:56:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081420709] [2021-02-19 19:56:04,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:04,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:56:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:04,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:56:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:04,834 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:04,834 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 27 treesize of output 15 [2021-02-19 19:56:04,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:04,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:04,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:04,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:56:04,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:04,964 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 31 treesize of output 19 [2021-02-19 19:56:04,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:04,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:04,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:04,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-02-19 19:56:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:05,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:05,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2021-02-19 19:56:05,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15835544] [2021-02-19 19:56:05,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 19:56:05,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:05,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 19:56:05,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:56:05,167 INFO L87 Difference]: Start difference. First operand 5558 states and 16538 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:06,025 INFO L93 Difference]: Finished difference Result 6041 states and 17723 transitions. [2021-02-19 19:56:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:56:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:06,039 INFO L225 Difference]: With dead ends: 6041 [2021-02-19 19:56:06,040 INFO L226 Difference]: Without dead ends: 5915 [2021-02-19 19:56:06,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:56:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-02-19 19:56:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5552. [2021-02-19 19:56:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 2.976400648531796) internal successors, (16522), 5551 states have internal predecessors, (16522), 0 states have call successors, (0), 0 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 19:56:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 16522 transitions. [2021-02-19 19:56:06,114 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 16522 transitions. Word has length 37 [2021-02-19 19:56:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:06,114 INFO L480 AbstractCegarLoop]: Abstraction has 5552 states and 16522 transitions. [2021-02-19 19:56:06,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 16522 transitions. [2021-02-19 19:56:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:06,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:06,123 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:06,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 19:56:06,330 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1863053010, now seen corresponding path program 12 times [2021-02-19 19:56:06,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:06,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100380044] [2021-02-19 19:56:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:06,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100380044] [2021-02-19 19:56:06,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184976653] [2021-02-19 19:56:06,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:06,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:56:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:56:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:07,151 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:56:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 13 [2021-02-19 19:56:07,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:07,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:07,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:07,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-02-19 19:56:07,386 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:07,386 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 17 [2021-02-19 19:56:07,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:07,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:07,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:07,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:07,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:07,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-02-19 19:56:07,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179379917] [2021-02-19 19:56:07,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:56:07,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:07,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:56:07,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:56:07,533 INFO L87 Difference]: Start difference. First operand 5552 states and 16522 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:11,190 INFO L93 Difference]: Finished difference Result 9466 states and 27492 transitions. [2021-02-19 19:56:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:56:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:11,203 INFO L225 Difference]: With dead ends: 9466 [2021-02-19 19:56:11,203 INFO L226 Difference]: Without dead ends: 9252 [2021-02-19 19:56:11,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=496, Invalid=5984, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:56:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-02-19 19:56:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 5577. [2021-02-19 19:56:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.9748923959827835) internal successors, (16588), 5576 states have internal predecessors, (16588), 0 states have call successors, (0), 0 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 19:56:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 16588 transitions. [2021-02-19 19:56:11,309 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 16588 transitions. Word has length 37 [2021-02-19 19:56:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:11,310 INFO L480 AbstractCegarLoop]: Abstraction has 5577 states and 16588 transitions. [2021-02-19 19:56:11,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 16588 transitions. [2021-02-19 19:56:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:11,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:11,316 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:11,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:11,516 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1346091490, now seen corresponding path program 13 times [2021-02-19 19:56:11,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:11,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858102218] [2021-02-19 19:56:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:11,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858102218] [2021-02-19 19:56:11,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502511408] [2021-02-19 19:56:11,962 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 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 19:56:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:56:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:12,440 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:12,440 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 25 treesize of output 13 [2021-02-19 19:56:12,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:12,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:12,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:12,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:56:12,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:12,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-02-19 19:56:12,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:12,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:12,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:12,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:12,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:12,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-02-19 19:56:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834669555] [2021-02-19 19:56:12,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 19:56:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 19:56:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:56:12,784 INFO L87 Difference]: Start difference. First operand 5577 states and 16588 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:16,604 INFO L93 Difference]: Finished difference Result 9023 states and 26238 transitions. [2021-02-19 19:56:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:56:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:16,616 INFO L225 Difference]: With dead ends: 9023 [2021-02-19 19:56:16,616 INFO L226 Difference]: Without dead ends: 8836 [2021-02-19 19:56:16,616 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=587, Invalid=5893, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:56:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-02-19 19:56:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 5631. [2021-02-19 19:56:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.969271758436945) internal successors, (16717), 5630 states have internal predecessors, (16717), 0 states have call successors, (0), 0 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 19:56:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 16717 transitions. [2021-02-19 19:56:16,720 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 16717 transitions. Word has length 37 [2021-02-19 19:56:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:16,720 INFO L480 AbstractCegarLoop]: Abstraction has 5631 states and 16717 transitions. [2021-02-19 19:56:16,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 16717 transitions. [2021-02-19 19:56:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:16,728 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:16,728 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:16,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 19:56:16,928 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1252569566, now seen corresponding path program 14 times [2021-02-19 19:56:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:16,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338889979] [2021-02-19 19:56:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:17,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338889979] [2021-02-19 19:56:17,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171405435] [2021-02-19 19:56:17,318 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 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 19:56:17,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:56:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:17,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:56:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:17,769 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:17,769 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 25 treesize of output 13 [2021-02-19 19:56:17,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:17,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:17,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:17,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:56:17,871 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:17,871 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 17 [2021-02-19 19:56:17,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:17,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:17,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:17,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:18,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:18,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-02-19 19:56:18,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051407811] [2021-02-19 19:56:18,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:56:18,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:56:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:56:18,147 INFO L87 Difference]: Start difference. First operand 5631 states and 16717 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:21,302 INFO L93 Difference]: Finished difference Result 6423 states and 18824 transitions. [2021-02-19 19:56:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:56:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:21,311 INFO L225 Difference]: With dead ends: 6423 [2021-02-19 19:56:21,311 INFO L226 Difference]: Without dead ends: 6272 [2021-02-19 19:56:21,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=212, Invalid=2868, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:56:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2021-02-19 19:56:21,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 5601. [2021-02-19 19:56:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 5600 states have (on average 2.9707142857142856) internal successors, (16636), 5600 states have internal predecessors, (16636), 0 states have call successors, (0), 0 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 19:56:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 16636 transitions. [2021-02-19 19:56:21,383 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 16636 transitions. Word has length 37 [2021-02-19 19:56:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:21,383 INFO L480 AbstractCegarLoop]: Abstraction has 5601 states and 16636 transitions. [2021-02-19 19:56:21,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:21,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 16636 transitions. [2021-02-19 19:56:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:21,391 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:21,391 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:21,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 19:56:21,594 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 917330462, now seen corresponding path program 15 times [2021-02-19 19:56:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:21,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999440530] [2021-02-19 19:56:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999440530] [2021-02-19 19:56:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876253393] [2021-02-19 19:56:22,051 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 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 19:56:22,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:56:22,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:22,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:56:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:22,388 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:22,389 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 25 treesize of output 13 [2021-02-19 19:56:22,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:22,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:22,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:22,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:56:22,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:22,628 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 17 [2021-02-19 19:56:22,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:22,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:22,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:22,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:22,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:22,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-02-19 19:56:22,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456649711] [2021-02-19 19:56:22,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:56:22,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:56:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:56:22,776 INFO L87 Difference]: Start difference. First operand 5601 states and 16636 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:26,347 INFO L93 Difference]: Finished difference Result 8617 states and 25088 transitions. [2021-02-19 19:56:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 19:56:26,348 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:26,359 INFO L225 Difference]: With dead ends: 8617 [2021-02-19 19:56:26,359 INFO L226 Difference]: Without dead ends: 8477 [2021-02-19 19:56:26,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=549, Invalid=5931, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:56:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2021-02-19 19:56:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 5640. [2021-02-19 19:56:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5640 states, 5639 states have (on average 2.9698528107820534) internal successors, (16747), 5639 states have internal predecessors, (16747), 0 states have call successors, (0), 0 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 19:56:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 16747 transitions. [2021-02-19 19:56:26,431 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 16747 transitions. Word has length 37 [2021-02-19 19:56:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:26,431 INFO L480 AbstractCegarLoop]: Abstraction has 5640 states and 16747 transitions. [2021-02-19 19:56:26,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 16747 transitions. [2021-02-19 19:56:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:26,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:26,436 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:26,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:26,637 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash -827033544, now seen corresponding path program 16 times [2021-02-19 19:56:26,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:26,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29063651] [2021-02-19 19:56:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:27,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29063651] [2021-02-19 19:56:27,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229136585] [2021-02-19 19:56:27,080 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 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 19:56:27,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:56:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:27,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:56:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:27,395 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:56:27,396 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 31 treesize of output 15 [2021-02-19 19:56:27,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:27,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:27,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:27,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:56:27,643 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:27,643 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 17 [2021-02-19 19:56:27,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:27,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:27,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:27,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:27,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:27,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:56:27,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991989290] [2021-02-19 19:56:27,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:56:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:56:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:56:27,904 INFO L87 Difference]: Start difference. First operand 5640 states and 16747 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:32,770 INFO L93 Difference]: Finished difference Result 9531 states and 27706 transitions. [2021-02-19 19:56:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 19:56:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:32,785 INFO L225 Difference]: With dead ends: 9531 [2021-02-19 19:56:32,785 INFO L226 Difference]: Without dead ends: 9344 [2021-02-19 19:56:32,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 19:56:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-02-19 19:56:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 5637. [2021-02-19 19:56:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 5636 states have (on average 2.970014194464159) internal successors, (16739), 5636 states have internal predecessors, (16739), 0 states have call successors, (0), 0 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 19:56:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 16739 transitions. [2021-02-19 19:56:32,868 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 16739 transitions. Word has length 37 [2021-02-19 19:56:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:32,868 INFO L480 AbstractCegarLoop]: Abstraction has 5637 states and 16739 transitions. [2021-02-19 19:56:32,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 16739 transitions. [2021-02-19 19:56:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:32,876 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:32,876 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:33,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 19:56:33,078 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash 869272696, now seen corresponding path program 17 times [2021-02-19 19:56:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:33,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138387240] [2021-02-19 19:56:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:33,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138387240] [2021-02-19 19:56:33,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061466540] [2021-02-19 19:56:33,522 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:33,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:56:33,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:33,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:56:33,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:33,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:33,841 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 27 treesize of output 15 [2021-02-19 19:56:33,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:33,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:33,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:33,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:56:34,160 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:34,161 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 36 treesize of output 20 [2021-02-19 19:56:34,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:34,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:34,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:34,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-02-19 19:56:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:34,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:34,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:56:34,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225804360] [2021-02-19 19:56:34,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:56:34,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:56:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:56:34,435 INFO L87 Difference]: Start difference. First operand 5637 states and 16739 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:38,141 INFO L93 Difference]: Finished difference Result 6441 states and 18913 transitions. [2021-02-19 19:56:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:56:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:38,149 INFO L225 Difference]: With dead ends: 6441 [2021-02-19 19:56:38,149 INFO L226 Difference]: Without dead ends: 6304 [2021-02-19 19:56:38,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:56:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-02-19 19:56:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 5647. [2021-02-19 19:56:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5647 states, 5646 states have (on average 2.9698901877435353) internal successors, (16768), 5646 states have internal predecessors, (16768), 0 states have call successors, (0), 0 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 19:56:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 16768 transitions. [2021-02-19 19:56:38,223 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 16768 transitions. Word has length 37 [2021-02-19 19:56:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:38,223 INFO L480 AbstractCegarLoop]: Abstraction has 5647 states and 16768 transitions. [2021-02-19 19:56:38,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 16768 transitions. [2021-02-19 19:56:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:38,228 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:38,228 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:38,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 19:56:38,434 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1311440460, now seen corresponding path program 18 times [2021-02-19 19:56:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180999064] [2021-02-19 19:56:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:38,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180999064] [2021-02-19 19:56:38,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597260626] [2021-02-19 19:56:38,861 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 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 19:56:38,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:56:38,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:56:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:39,176 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:56:39,177 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 42 treesize of output 22 [2021-02-19 19:56:39,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:39,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:39,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:39,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:27 [2021-02-19 19:56:39,384 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:39,384 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 34 treesize of output 20 [2021-02-19 19:56:39,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:39,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:39,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:39,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-02-19 19:56:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:39,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:39,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 32 [2021-02-19 19:56:39,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79190984] [2021-02-19 19:56:39,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 19:56:39,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 19:56:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:56:39,497 INFO L87 Difference]: Start difference. First operand 5647 states and 16768 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:40,429 INFO L93 Difference]: Finished difference Result 6166 states and 18092 transitions. [2021-02-19 19:56:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:56:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:40,438 INFO L225 Difference]: With dead ends: 6166 [2021-02-19 19:56:40,438 INFO L226 Difference]: Without dead ends: 6109 [2021-02-19 19:56:40,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:56:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-02-19 19:56:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5659. [2021-02-19 19:56:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.9692470837751856) internal successors, (16800), 5658 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:56:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16800 transitions. [2021-02-19 19:56:40,507 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16800 transitions. Word has length 37 [2021-02-19 19:56:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:40,507 INFO L480 AbstractCegarLoop]: Abstraction has 5659 states and 16800 transitions. [2021-02-19 19:56:40,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16800 transitions. [2021-02-19 19:56:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:40,512 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:40,512 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:40,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:40,714 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1862214840, now seen corresponding path program 19 times [2021-02-19 19:56:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345250603] [2021-02-19 19:56:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:41,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345250603] [2021-02-19 19:56:41,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225749521] [2021-02-19 19:56:41,347 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:56:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:41,668 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:56:41,669 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 31 treesize of output 15 [2021-02-19 19:56:41,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:41,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:41,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:41,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:56:41,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:41,920 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 17 [2021-02-19 19:56:41,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:41,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:41,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:41,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:42,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:42,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:56:42,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665245864] [2021-02-19 19:56:42,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:56:42,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:56:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:56:42,191 INFO L87 Difference]: Start difference. First operand 5659 states and 16800 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:47,004 INFO L93 Difference]: Finished difference Result 9694 states and 28179 transitions. [2021-02-19 19:56:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:56:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:47,019 INFO L225 Difference]: With dead ends: 9694 [2021-02-19 19:56:47,019 INFO L226 Difference]: Without dead ends: 9507 [2021-02-19 19:56:47,020 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=604, Invalid=7586, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 19:56:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9507 states. [2021-02-19 19:56:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9507 to 5644. [2021-02-19 19:56:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5644 states, 5643 states have (on average 2.9700513911040227) internal successors, (16760), 5643 states have internal predecessors, (16760), 0 states have call successors, (0), 0 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 19:56:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5644 states to 5644 states and 16760 transitions. [2021-02-19 19:56:47,111 INFO L78 Accepts]: Start accepts. Automaton has 5644 states and 16760 transitions. Word has length 37 [2021-02-19 19:56:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:47,111 INFO L480 AbstractCegarLoop]: Abstraction has 5644 states and 16760 transitions. [2021-02-19 19:56:47,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5644 states and 16760 transitions. [2021-02-19 19:56:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:47,119 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:47,119 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:47,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 19:56:47,333 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:47,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2024220070, now seen corresponding path program 20 times [2021-02-19 19:56:47,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:47,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252864115] [2021-02-19 19:56:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252864115] [2021-02-19 19:56:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546219834] [2021-02-19 19:56:47,825 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 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 19:56:47,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:56:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:56:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:48,203 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:48,203 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 25 treesize of output 13 [2021-02-19 19:56:48,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:48,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:48,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:48,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:56:48,460 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:48,460 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 17 [2021-02-19 19:56:48,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:48,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:48,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:48,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:48,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:48,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:56:48,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387487484] [2021-02-19 19:56:48,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:56:48,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:56:48,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:56:48,733 INFO L87 Difference]: Start difference. First operand 5644 states and 16760 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:52,812 INFO L93 Difference]: Finished difference Result 9493 states and 27668 transitions. [2021-02-19 19:56:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:56:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:52,825 INFO L225 Difference]: With dead ends: 9493 [2021-02-19 19:56:52,825 INFO L226 Difference]: Without dead ends: 9282 [2021-02-19 19:56:52,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=476, Invalid=5844, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:56:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-02-19 19:56:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 5646. [2021-02-19 19:56:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 5645 states have (on average 2.970770593445527) internal successors, (16770), 5645 states have internal predecessors, (16770), 0 states have call successors, (0), 0 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 19:56:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 16770 transitions. [2021-02-19 19:56:52,907 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 16770 transitions. Word has length 37 [2021-02-19 19:56:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:52,907 INFO L480 AbstractCegarLoop]: Abstraction has 5646 states and 16770 transitions. [2021-02-19 19:56:52,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 16770 transitions. [2021-02-19 19:56:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:52,912 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:52,913 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:53,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:53,126 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -327913830, now seen corresponding path program 21 times [2021-02-19 19:56:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:53,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730896141] [2021-02-19 19:56:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730896141] [2021-02-19 19:56:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074876547] [2021-02-19 19:56:53,586 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 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 19:56:53,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:56:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:56:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:53,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:53,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 19:56:53,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:53,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:53,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:53,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:56:54,167 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:54,167 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 17 [2021-02-19 19:56:54,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:54,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:54,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:54,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:56:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:54,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:56:54,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238863958] [2021-02-19 19:56:54,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:56:54,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:56:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:56:54,469 INFO L87 Difference]: Start difference. First operand 5646 states and 16770 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:58,212 INFO L93 Difference]: Finished difference Result 6413 states and 18873 transitions. [2021-02-19 19:56:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:56:58,213 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:56:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:58,220 INFO L225 Difference]: With dead ends: 6413 [2021-02-19 19:56:58,220 INFO L226 Difference]: Without dead ends: 6276 [2021-02-19 19:56:58,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:56:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2021-02-19 19:56:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 5662. [2021-02-19 19:56:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5662 states, 5661 states have (on average 2.9703232644409114) internal successors, (16815), 5661 states have internal predecessors, (16815), 0 states have call successors, (0), 0 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 19:56:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5662 states to 5662 states and 16815 transitions. [2021-02-19 19:56:58,282 INFO L78 Accepts]: Start accepts. Automaton has 5662 states and 16815 transitions. Word has length 37 [2021-02-19 19:56:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:58,282 INFO L480 AbstractCegarLoop]: Abstraction has 5662 states and 16815 transitions. [2021-02-19 19:56:58,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:56:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5662 states and 16815 transitions. [2021-02-19 19:56:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:56:58,287 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:58,288 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:58,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 19:56:58,490 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1786340310, now seen corresponding path program 22 times [2021-02-19 19:56:58,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:58,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241720177] [2021-02-19 19:56:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:58,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241720177] [2021-02-19 19:56:58,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556950636] [2021-02-19 19:56:58,889 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 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 19:56:58,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:56:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:56:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:59,193 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:56:59,193 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 31 treesize of output 15 [2021-02-19 19:56:59,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:59,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:59,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:59,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:56:59,384 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:56:59,384 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 39 treesize of output 23 [2021-02-19 19:56:59,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:56:59,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:56:59,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:56:59,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:17 [2021-02-19 19:56:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:59,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:59,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 19:56:59,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920028506] [2021-02-19 19:56:59,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:56:59,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:59,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:56:59,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:56:59,597 INFO L87 Difference]: Start difference. First operand 5662 states and 16815 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:02,221 INFO L93 Difference]: Finished difference Result 6566 states and 19311 transitions. [2021-02-19 19:57:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:57:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:02,231 INFO L225 Difference]: With dead ends: 6566 [2021-02-19 19:57:02,231 INFO L226 Difference]: Without dead ends: 6408 [2021-02-19 19:57:02,231 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:57:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-02-19 19:57:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 5683. [2021-02-19 19:57:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5683 states, 5682 states have (on average 2.969904963041183) internal successors, (16875), 5682 states have internal predecessors, (16875), 0 states have call successors, (0), 0 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 19:57:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5683 states to 5683 states and 16875 transitions. [2021-02-19 19:57:02,302 INFO L78 Accepts]: Start accepts. Automaton has 5683 states and 16875 transitions. Word has length 37 [2021-02-19 19:57:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:02,303 INFO L480 AbstractCegarLoop]: Abstraction has 5683 states and 16875 transitions. [2021-02-19 19:57:02,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5683 states and 16875 transitions. [2021-02-19 19:57:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:02,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:02,308 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:02,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:02,510 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1637259844, now seen corresponding path program 23 times [2021-02-19 19:57:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:02,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034268246] [2021-02-19 19:57:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:03,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034268246] [2021-02-19 19:57:03,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009498820] [2021-02-19 19:57:03,006 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 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 19:57:03,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:57:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:57:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:03,297 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:03,297 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 27 treesize of output 15 [2021-02-19 19:57:03,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:03,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:03,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:03,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 19:57:03,586 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:57:03,586 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 33 treesize of output 17 [2021-02-19 19:57:03,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:03,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:03,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:03,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-02-19 19:57:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:57:03,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043940799] [2021-02-19 19:57:03,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:57:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:03,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:57:03,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:57:03,862 INFO L87 Difference]: Start difference. First operand 5683 states and 16875 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:09,065 INFO L93 Difference]: Finished difference Result 8304 states and 24137 transitions. [2021-02-19 19:57:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:57:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:09,079 INFO L225 Difference]: With dead ends: 8304 [2021-02-19 19:57:09,079 INFO L226 Difference]: Without dead ends: 8149 [2021-02-19 19:57:09,080 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=716, Invalid=7656, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 19:57:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-02-19 19:57:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 5759. [2021-02-19 19:57:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5758 states have (on average 2.965613060090309) internal successors, (17076), 5758 states have internal predecessors, (17076), 0 states have call successors, (0), 0 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 19:57:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 17076 transitions. [2021-02-19 19:57:09,158 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 17076 transitions. Word has length 37 [2021-02-19 19:57:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:09,158 INFO L480 AbstractCegarLoop]: Abstraction has 5759 states and 17076 transitions. [2021-02-19 19:57:09,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 17076 transitions. [2021-02-19 19:57:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:09,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:09,165 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:09,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 19:57:09,365 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash 59046396, now seen corresponding path program 24 times [2021-02-19 19:57:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:09,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915108391] [2021-02-19 19:57:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915108391] [2021-02-19 19:57:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582352088] [2021-02-19 19:57:09,880 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 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 19:57:09,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:57:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:57:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:10,175 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:57:10,176 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 31 treesize of output 15 [2021-02-19 19:57:10,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:10,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:10,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:10,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-02-19 19:57:10,462 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-02-19 19:57:10,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:10,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:10,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:10,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:10,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:10,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 19:57:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841927800] [2021-02-19 19:57:10,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:57:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:57:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:57:10,614 INFO L87 Difference]: Start difference. First operand 5759 states and 17076 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:12,436 INFO L93 Difference]: Finished difference Result 6039 states and 17767 transitions. [2021-02-19 19:57:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:57:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:12,445 INFO L225 Difference]: With dead ends: 6039 [2021-02-19 19:57:12,445 INFO L226 Difference]: Without dead ends: 5996 [2021-02-19 19:57:12,446 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=222, Invalid=2640, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:57:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-02-19 19:57:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5759. [2021-02-19 19:57:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5758 states have (on average 2.965613060090309) internal successors, (17076), 5758 states have internal predecessors, (17076), 0 states have call successors, (0), 0 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 19:57:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 17076 transitions. [2021-02-19 19:57:12,506 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 17076 transitions. Word has length 37 [2021-02-19 19:57:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:12,506 INFO L480 AbstractCegarLoop]: Abstraction has 5759 states and 17076 transitions. [2021-02-19 19:57:12,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 17076 transitions. [2021-02-19 19:57:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:12,512 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:12,512 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:12,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:12,715 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash 913343446, now seen corresponding path program 25 times [2021-02-19 19:57:12,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:12,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457809136] [2021-02-19 19:57:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:13,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457809136] [2021-02-19 19:57:13,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042072435] [2021-02-19 19:57:13,171 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 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 19:57:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:57:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:13,459 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:57:13,460 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 31 treesize of output 15 [2021-02-19 19:57:13,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:13,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:13,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:13,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-02-19 19:57:13,772 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:13,772 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 17 [2021-02-19 19:57:13,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:13,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:13,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:13,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:14,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:14,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:57:14,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510250226] [2021-02-19 19:57:14,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:57:14,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:14,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:57:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:57:14,079 INFO L87 Difference]: Start difference. First operand 5759 states and 17076 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:18,031 INFO L93 Difference]: Finished difference Result 8890 states and 25877 transitions. [2021-02-19 19:57:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 19:57:18,032 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:18,045 INFO L225 Difference]: With dead ends: 8890 [2021-02-19 19:57:18,045 INFO L226 Difference]: Without dead ends: 8703 [2021-02-19 19:57:18,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=561, Invalid=6081, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 19:57:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8703 states. [2021-02-19 19:57:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8703 to 5756. [2021-02-19 19:57:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5756 states, 5755 states have (on average 2.965768896611642) internal successors, (17068), 5755 states have internal predecessors, (17068), 0 states have call successors, (0), 0 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 19:57:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 17068 transitions. [2021-02-19 19:57:18,123 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 17068 transitions. Word has length 37 [2021-02-19 19:57:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:18,123 INFO L480 AbstractCegarLoop]: Abstraction has 5756 states and 17068 transitions. [2021-02-19 19:57:18,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 17068 transitions. [2021-02-19 19:57:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:18,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:18,161 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:18,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 19:57:18,361 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1685317610, now seen corresponding path program 26 times [2021-02-19 19:57:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:18,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129060418] [2021-02-19 19:57:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129060418] [2021-02-19 19:57:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716637224] [2021-02-19 19:57:18,770 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 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 19:57:18,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:57:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:18,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:57:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:19,060 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:19,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 19:57:19,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:19,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:19,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:19,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-02-19 19:57:19,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:19,375 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 17 [2021-02-19 19:57:19,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:19,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:19,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:19,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:19,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:19,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:57:19,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878586182] [2021-02-19 19:57:19,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:57:19,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:57:19,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:57:19,796 INFO L87 Difference]: Start difference. First operand 5756 states and 17068 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:23,696 INFO L93 Difference]: Finished difference Result 6475 states and 19025 transitions. [2021-02-19 19:57:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:57:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:23,705 INFO L225 Difference]: With dead ends: 6475 [2021-02-19 19:57:23,705 INFO L226 Difference]: Without dead ends: 6338 [2021-02-19 19:57:23,705 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=202, Invalid=3104, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:57:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2021-02-19 19:57:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 5752. [2021-02-19 19:57:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5752 states, 5751 states have (on average 2.9655712050078247) internal successors, (17055), 5751 states have internal predecessors, (17055), 0 states have call successors, (0), 0 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 19:57:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5752 states to 5752 states and 17055 transitions. [2021-02-19 19:57:23,767 INFO L78 Accepts]: Start accepts. Automaton has 5752 states and 17055 transitions. Word has length 37 [2021-02-19 19:57:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:23,767 INFO L480 AbstractCegarLoop]: Abstraction has 5752 states and 17055 transitions. [2021-02-19 19:57:23,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5752 states and 17055 transitions. [2021-02-19 19:57:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:23,772 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:23,773 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:23,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:23,973 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash 428936530, now seen corresponding path program 27 times [2021-02-19 19:57:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:23,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760679621] [2021-02-19 19:57:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760679621] [2021-02-19 19:57:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214458885] [2021-02-19 19:57:24,507 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 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 19:57:24,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:57:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:57:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:24,834 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:24,834 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 17 [2021-02-19 19:57:24,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:24,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:24,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:24,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 19:57:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:57:25,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:57:25,387 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 46 treesize of output 24 [2021-02-19 19:57:25,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:25,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:25,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:25,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:22 [2021-02-19 19:57:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:25,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:25,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 19:57:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258720186] [2021-02-19 19:57:25,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:57:25,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:25,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:57:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:57:25,537 INFO L87 Difference]: Start difference. First operand 5752 states and 17055 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:27,605 INFO L93 Difference]: Finished difference Result 6043 states and 17792 transitions. [2021-02-19 19:57:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:57:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:27,614 INFO L225 Difference]: With dead ends: 6043 [2021-02-19 19:57:27,614 INFO L226 Difference]: Without dead ends: 5993 [2021-02-19 19:57:27,615 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=172, Invalid=2378, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:57:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-02-19 19:57:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 5746. [2021-02-19 19:57:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5745 states have (on average 2.965883376849434) internal successors, (17039), 5745 states have internal predecessors, (17039), 0 states have call successors, (0), 0 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 19:57:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 17039 transitions. [2021-02-19 19:57:27,673 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 17039 transitions. Word has length 37 [2021-02-19 19:57:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:27,673 INFO L480 AbstractCegarLoop]: Abstraction has 5746 states and 17039 transitions. [2021-02-19 19:57:27,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 17039 transitions. [2021-02-19 19:57:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:27,678 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:27,678 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:27,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 19:57:27,878 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:27,879 INFO L82 PathProgramCache]: Analyzing trace with hash -121837850, now seen corresponding path program 28 times [2021-02-19 19:57:27,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:27,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183230137] [2021-02-19 19:57:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183230137] [2021-02-19 19:57:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750171006] [2021-02-19 19:57:28,490 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 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 19:57:28,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:57:28,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:57:28,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:28,818 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:57:28,818 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 31 treesize of output 15 [2021-02-19 19:57:28,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:28,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:28,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:28,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-02-19 19:57:29,203 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:29,203 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 17 [2021-02-19 19:57:29,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:29,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:29,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:29,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:29,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:29,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:57:29,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101290933] [2021-02-19 19:57:29,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:57:29,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:57:29,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:57:29,533 INFO L87 Difference]: Start difference. First operand 5746 states and 17039 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:33,654 INFO L93 Difference]: Finished difference Result 9061 states and 26383 transitions. [2021-02-19 19:57:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:57:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:33,668 INFO L225 Difference]: With dead ends: 9061 [2021-02-19 19:57:33,669 INFO L226 Difference]: Without dead ends: 8874 [2021-02-19 19:57:33,669 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=504, Invalid=5976, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:57:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8874 states. [2021-02-19 19:57:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8874 to 5736. [2021-02-19 19:57:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5736 states, 5735 states have (on average 2.965998256320837) internal successors, (17010), 5735 states have internal predecessors, (17010), 0 states have call successors, (0), 0 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 19:57:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 17010 transitions. [2021-02-19 19:57:33,742 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 17010 transitions. Word has length 37 [2021-02-19 19:57:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:33,742 INFO L480 AbstractCegarLoop]: Abstraction has 5736 states and 17010 transitions. [2021-02-19 19:57:33,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 17010 transitions. [2021-02-19 19:57:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:33,747 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:33,747 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:33,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-02-19 19:57:33,948 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1574468390, now seen corresponding path program 29 times [2021-02-19 19:57:33,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:33,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156354824] [2021-02-19 19:57:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:34,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156354824] [2021-02-19 19:57:34,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514305284] [2021-02-19 19:57:34,484 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 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 19:57:34,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:57:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:57:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:34,876 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:34,876 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 27 treesize of output 15 [2021-02-19 19:57:34,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:34,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:34,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:34,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 19:57:35,307 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:35,308 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 17 [2021-02-19 19:57:35,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:35,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:35,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:35,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:35,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:35,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:57:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919718601] [2021-02-19 19:57:35,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:57:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:57:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:57:35,674 INFO L87 Difference]: Start difference. First operand 5736 states and 17010 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:38,121 INFO L93 Difference]: Finished difference Result 6145 states and 18019 transitions. [2021-02-19 19:57:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:57:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:38,133 INFO L225 Difference]: With dead ends: 6145 [2021-02-19 19:57:38,133 INFO L226 Difference]: Without dead ends: 6048 [2021-02-19 19:57:38,133 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:57:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-02-19 19:57:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 5742. [2021-02-19 19:57:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5742 states, 5741 states have (on average 2.965685420658422) internal successors, (17026), 5741 states have internal predecessors, (17026), 0 states have call successors, (0), 0 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 19:57:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5742 states to 5742 states and 17026 transitions. [2021-02-19 19:57:38,191 INFO L78 Accepts]: Start accepts. Automaton has 5742 states and 17026 transitions. Word has length 37 [2021-02-19 19:57:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:38,191 INFO L480 AbstractCegarLoop]: Abstraction has 5742 states and 17026 transitions. [2021-02-19 19:57:38,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 5742 states and 17026 transitions. [2021-02-19 19:57:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:38,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:38,196 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:38,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:38,397 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash -606244766, now seen corresponding path program 30 times [2021-02-19 19:57:38,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:38,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121958433] [2021-02-19 19:57:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:38,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121958433] [2021-02-19 19:57:38,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152153920] [2021-02-19 19:57:38,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:57:38,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:57:38,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:57:38,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:39,244 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:57:39,244 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 31 treesize of output 15 [2021-02-19 19:57:39,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:39,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:39,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:39,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-02-19 19:57:39,619 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:39,619 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 39 treesize of output 23 [2021-02-19 19:57:39,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:39,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:39,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:39,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:17 [2021-02-19 19:57:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:39,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:39,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 19:57:39,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374266569] [2021-02-19 19:57:39,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:57:39,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:57:39,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:57:39,741 INFO L87 Difference]: Start difference. First operand 5742 states and 17026 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:41,525 INFO L93 Difference]: Finished difference Result 6045 states and 17795 transitions. [2021-02-19 19:57:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:57:41,526 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:41,533 INFO L225 Difference]: With dead ends: 6045 [2021-02-19 19:57:41,534 INFO L226 Difference]: Without dead ends: 5988 [2021-02-19 19:57:41,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=154, Invalid=2008, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:57:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2021-02-19 19:57:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5739. [2021-02-19 19:57:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5739 states, 5738 states have (on average 2.965841756709655) internal successors, (17018), 5738 states have internal predecessors, (17018), 0 states have call successors, (0), 0 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 19:57:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 17018 transitions. [2021-02-19 19:57:41,593 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 17018 transitions. Word has length 37 [2021-02-19 19:57:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:41,593 INFO L480 AbstractCegarLoop]: Abstraction has 5739 states and 17018 transitions. [2021-02-19 19:57:41,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 17018 transitions. [2021-02-19 19:57:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:41,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:41,598 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:41,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 19:57:41,802 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:41,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash -283843080, now seen corresponding path program 31 times [2021-02-19 19:57:41,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:41,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938698693] [2021-02-19 19:57:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:42,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938698693] [2021-02-19 19:57:42,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667092990] [2021-02-19 19:57:42,323 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 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 19:57:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:57:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:42,640 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:57:42,641 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 13 [2021-02-19 19:57:42,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:42,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:42,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:42,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2021-02-19 19:57:42,976 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:42,976 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 17 [2021-02-19 19:57:42,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:42,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:42,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:42,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:43,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:43,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:57:43,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436275608] [2021-02-19 19:57:43,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:57:43,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:57:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:57:43,288 INFO L87 Difference]: Start difference. First operand 5739 states and 17018 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:47,655 INFO L93 Difference]: Finished difference Result 9606 states and 27990 transitions. [2021-02-19 19:57:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:57:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:47,668 INFO L225 Difference]: With dead ends: 9606 [2021-02-19 19:57:47,668 INFO L226 Difference]: Without dead ends: 9395 [2021-02-19 19:57:47,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=470, Invalid=5850, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:57:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9395 states. [2021-02-19 19:57:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9395 to 5715. [2021-02-19 19:57:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5715 states, 5714 states have (on average 2.9658732936646834) internal successors, (16947), 5714 states have internal predecessors, (16947), 0 states have call successors, (0), 0 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 19:57:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5715 states to 5715 states and 16947 transitions. [2021-02-19 19:57:47,746 INFO L78 Accepts]: Start accepts. Automaton has 5715 states and 16947 transitions. Word has length 37 [2021-02-19 19:57:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:47,746 INFO L480 AbstractCegarLoop]: Abstraction has 5715 states and 16947 transitions. [2021-02-19 19:57:47,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5715 states and 16947 transitions. [2021-02-19 19:57:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:47,751 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:47,751 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:47,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:47,952 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1412463160, now seen corresponding path program 32 times [2021-02-19 19:57:47,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:47,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304089424] [2021-02-19 19:57:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:48,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304089424] [2021-02-19 19:57:48,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139534036] [2021-02-19 19:57:48,497 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 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 19:57:48,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:57:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:57:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:48,889 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:48,890 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 25 treesize of output 13 [2021-02-19 19:57:48,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:48,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:48,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:48,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-02-19 19:57:49,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:49,233 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 17 [2021-02-19 19:57:49,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:49,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:49,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:49,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:49,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:49,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:57:49,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718373922] [2021-02-19 19:57:49,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:57:49,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:57:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:57:49,588 INFO L87 Difference]: Start difference. First operand 5715 states and 16947 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:53,820 INFO L93 Difference]: Finished difference Result 6454 states and 18976 transitions. [2021-02-19 19:57:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:57:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:53,829 INFO L225 Difference]: With dead ends: 6454 [2021-02-19 19:57:53,829 INFO L226 Difference]: Without dead ends: 6317 [2021-02-19 19:57:53,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=204, Invalid=2988, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:57:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-02-19 19:57:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5728. [2021-02-19 19:57:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5727 states have (on average 2.965601536581107) internal successors, (16984), 5727 states have internal predecessors, (16984), 0 states have call successors, (0), 0 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 19:57:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 16984 transitions. [2021-02-19 19:57:53,889 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 16984 transitions. Word has length 37 [2021-02-19 19:57:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:53,889 INFO L480 AbstractCegarLoop]: Abstraction has 5728 states and 16984 transitions. [2021-02-19 19:57:53,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 16984 transitions. [2021-02-19 19:57:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:53,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:53,896 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:54,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 19:57:54,096 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash -768249996, now seen corresponding path program 33 times [2021-02-19 19:57:54,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:54,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087316456] [2021-02-19 19:57:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:54,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087316456] [2021-02-19 19:57:54,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518001978] [2021-02-19 19:57:54,628 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:54,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:57:54,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:57:54,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:54,954 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:54,954 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 27 treesize of output 15 [2021-02-19 19:57:54,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:54,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:54,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:54,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-02-19 19:57:55,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:57:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:57:55,529 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 19 [2021-02-19 19:57:55,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:55,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:55,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2021-02-19 19:57:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:55,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:55,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 19:57:55,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123460202] [2021-02-19 19:57:55,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:57:55,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:57:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:57:55,673 INFO L87 Difference]: Start difference. First operand 5728 states and 16984 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:57,021 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-02-19 19:57:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:57,645 INFO L93 Difference]: Finished difference Result 6052 states and 17803 transitions. [2021-02-19 19:57:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:57:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:57:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:57,653 INFO L225 Difference]: With dead ends: 6052 [2021-02-19 19:57:57,653 INFO L226 Difference]: Without dead ends: 5988 [2021-02-19 19:57:57,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:57:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2021-02-19 19:57:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5719. [2021-02-19 19:57:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5719 states, 5718 states have (on average 2.9660720531654423) internal successors, (16960), 5718 states have internal predecessors, (16960), 0 states have call successors, (0), 0 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 19:57:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 16960 transitions. [2021-02-19 19:57:57,711 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 16960 transitions. Word has length 37 [2021-02-19 19:57:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:57,711 INFO L480 AbstractCegarLoop]: Abstraction has 5719 states and 16960 transitions. [2021-02-19 19:57:57,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:57:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 16960 transitions. [2021-02-19 19:57:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:57:57,718 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:57,718 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:57,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 19:57:57,919 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1416834718, now seen corresponding path program 34 times [2021-02-19 19:57:57,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:57,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115449461] [2021-02-19 19:57:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:58,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115449461] [2021-02-19 19:57:58,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017869578] [2021-02-19 19:57:58,595 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:58,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:57:58,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:58,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:57:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:59,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:59,075 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 27 treesize of output 15 [2021-02-19 19:57:59,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:59,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:59,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:59,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-02-19 19:57:59,468 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:57:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-02-19 19:57:59,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:57:59,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:57:59,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:57:59,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:57:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:59,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:59,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-02-19 19:57:59,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972633385] [2021-02-19 19:57:59,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:57:59,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:57:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:57:59,806 INFO L87 Difference]: Start difference. First operand 5719 states and 16960 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:04,119 INFO L93 Difference]: Finished difference Result 10573 states and 31147 transitions. [2021-02-19 19:58:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 19:58:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:04,134 INFO L225 Difference]: With dead ends: 10573 [2021-02-19 19:58:04,134 INFO L226 Difference]: Without dead ends: 10466 [2021-02-19 19:58:04,134 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=478, Invalid=5842, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:58:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2021-02-19 19:58:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 5917. [2021-02-19 19:58:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5917 states, 5916 states have (on average 2.970419202163624) internal successors, (17573), 5916 states have internal predecessors, (17573), 0 states have call successors, (0), 0 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 19:58:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5917 states to 5917 states and 17573 transitions. [2021-02-19 19:58:04,218 INFO L78 Accepts]: Start accepts. Automaton has 5917 states and 17573 transitions. Word has length 37 [2021-02-19 19:58:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:04,218 INFO L480 AbstractCegarLoop]: Abstraction has 5917 states and 17573 transitions. [2021-02-19 19:58:04,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5917 states and 17573 transitions. [2021-02-19 19:58:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:04,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:04,223 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:04,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:04,423 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:04,423 INFO L82 PathProgramCache]: Analyzing trace with hash 279471522, now seen corresponding path program 35 times [2021-02-19 19:58:04,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:04,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066523104] [2021-02-19 19:58:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:04,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066523104] [2021-02-19 19:58:04,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980001256] [2021-02-19 19:58:04,887 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 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 19:58:04,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:58:04,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:04,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:58:04,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:05,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:05,262 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 27 treesize of output 15 [2021-02-19 19:58:05,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:05,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:05,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:05,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 19:58:05,644 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:05,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-02-19 19:58:05,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:05,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:05,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:05,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-02-19 19:58:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:06,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:06,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:58:06,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368011131] [2021-02-19 19:58:06,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:58:06,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:06,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:58:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:58:06,008 INFO L87 Difference]: Start difference. First operand 5917 states and 17573 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:11,053 INFO L93 Difference]: Finished difference Result 6826 states and 20124 transitions. [2021-02-19 19:58:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:58:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:11,063 INFO L225 Difference]: With dead ends: 6826 [2021-02-19 19:58:11,063 INFO L226 Difference]: Without dead ends: 6774 [2021-02-19 19:58:11,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=222, Invalid=3200, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:58:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6774 states. [2021-02-19 19:58:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6774 to 6011. [2021-02-19 19:58:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 2.966222961730449) internal successors, (17827), 6010 states have internal predecessors, (17827), 0 states have call successors, (0), 0 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 19:58:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 17827 transitions. [2021-02-19 19:58:11,126 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 17827 transitions. Word has length 37 [2021-02-19 19:58:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:11,126 INFO L480 AbstractCegarLoop]: Abstraction has 6011 states and 17827 transitions. [2021-02-19 19:58:11,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 17827 transitions. [2021-02-19 19:58:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:11,131 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:11,131 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:11,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:11,332 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:11,332 INFO L82 PathProgramCache]: Analyzing trace with hash 214843226, now seen corresponding path program 36 times [2021-02-19 19:58:11,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:11,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610491983] [2021-02-19 19:58:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:11,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610491983] [2021-02-19 19:58:11,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986163268] [2021-02-19 19:58:11,874 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 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 19:58:11,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:58:11,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:58:11,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:58:12,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:58:12,729 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 33 treesize of output 21 [2021-02-19 19:58:12,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:12,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:12,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:12,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:48 [2021-02-19 19:58:12,929 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:12,929 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 38 treesize of output 22 [2021-02-19 19:58:12,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:12,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:12,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:12,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-02-19 19:58:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:13,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:13,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-02-19 19:58:13,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976805548] [2021-02-19 19:58:13,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:58:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:13,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:58:13,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:58:13,289 INFO L87 Difference]: Start difference. First operand 6011 states and 17827 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:15,408 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 19:58:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:17,878 INFO L93 Difference]: Finished difference Result 7795 states and 22807 transitions. [2021-02-19 19:58:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:58:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:17,890 INFO L225 Difference]: With dead ends: 7795 [2021-02-19 19:58:17,890 INFO L226 Difference]: Without dead ends: 7592 [2021-02-19 19:58:17,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=230, Invalid=3310, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:58:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2021-02-19 19:58:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 6002. [2021-02-19 19:58:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6002 states, 6001 states have (on average 2.9666722212964505) internal successors, (17803), 6001 states have internal predecessors, (17803), 0 states have call successors, (0), 0 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 19:58:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6002 states to 6002 states and 17803 transitions. [2021-02-19 19:58:17,957 INFO L78 Accepts]: Start accepts. Automaton has 6002 states and 17803 transitions. Word has length 37 [2021-02-19 19:58:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:17,958 INFO L480 AbstractCegarLoop]: Abstraction has 6002 states and 17803 transitions. [2021-02-19 19:58:17,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6002 states and 17803 transitions. [2021-02-19 19:58:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:17,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:17,964 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:18,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:18,164 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:18,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1728992504, now seen corresponding path program 37 times [2021-02-19 19:58:18,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:18,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541036351] [2021-02-19 19:58:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:18,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541036351] [2021-02-19 19:58:18,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17331485] [2021-02-19 19:58:18,789 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 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 19:58:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:58:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:19,395 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:19,396 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 25 treesize of output 13 [2021-02-19 19:58:19,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:19,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:19,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:19,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:58:19,537 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:19,537 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 17 [2021-02-19 19:58:19,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:19,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:19,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:19,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:58:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:19,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:19,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-02-19 19:58:19,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031411965] [2021-02-19 19:58:19,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:58:19,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:58:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:58:19,904 INFO L87 Difference]: Start difference. First operand 6002 states and 17803 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:24,433 INFO L93 Difference]: Finished difference Result 7709 states and 22544 transitions. [2021-02-19 19:58:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:58:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:24,443 INFO L225 Difference]: With dead ends: 7709 [2021-02-19 19:58:24,443 INFO L226 Difference]: Without dead ends: 7515 [2021-02-19 19:58:24,443 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:58:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7515 states. [2021-02-19 19:58:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7515 to 6011. [2021-02-19 19:58:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 2.9647254575707156) internal successors, (17818), 6010 states have internal predecessors, (17818), 0 states have call successors, (0), 0 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 19:58:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 17818 transitions. [2021-02-19 19:58:24,519 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 17818 transitions. Word has length 37 [2021-02-19 19:58:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:24,519 INFO L480 AbstractCegarLoop]: Abstraction has 6011 states and 17818 transitions. [2021-02-19 19:58:24,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 17818 transitions. [2021-02-19 19:58:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:24,524 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:24,524 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:24,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 19:58:24,725 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1300231476, now seen corresponding path program 38 times [2021-02-19 19:58:24,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:24,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331190633] [2021-02-19 19:58:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:25,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331190633] [2021-02-19 19:58:25,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645830630] [2021-02-19 19:58:25,496 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 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 19:58:25,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:58:25,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:58:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:25,926 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:25,926 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 27 treesize of output 15 [2021-02-19 19:58:25,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:25,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:25,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:25,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:58:26,269 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:26,269 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 17 [2021-02-19 19:58:26,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:26,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:26,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:26,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:58:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:26,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:26,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:58:26,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112895309] [2021-02-19 19:58:26,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:58:26,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:58:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:58:26,665 INFO L87 Difference]: Start difference. First operand 6011 states and 17818 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:30,895 INFO L93 Difference]: Finished difference Result 7626 states and 22349 transitions. [2021-02-19 19:58:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:58:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:30,906 INFO L225 Difference]: With dead ends: 7626 [2021-02-19 19:58:30,906 INFO L226 Difference]: Without dead ends: 7497 [2021-02-19 19:58:30,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:58:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7497 states. [2021-02-19 19:58:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7497 to 6020. [2021-02-19 19:58:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 6019 states have (on average 2.9637813590297393) internal successors, (17839), 6019 states have internal predecessors, (17839), 0 states have call successors, (0), 0 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 19:58:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 17839 transitions. [2021-02-19 19:58:30,974 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 17839 transitions. Word has length 37 [2021-02-19 19:58:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:30,974 INFO L480 AbstractCegarLoop]: Abstraction has 6020 states and 17839 transitions. [2021-02-19 19:58:30,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 17839 transitions. [2021-02-19 19:58:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:30,979 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:30,979 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:31,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:31,180 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash -444132530, now seen corresponding path program 39 times [2021-02-19 19:58:31,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:31,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059135033] [2021-02-19 19:58:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:31,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059135033] [2021-02-19 19:58:31,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409105482] [2021-02-19 19:58:31,850 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 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 19:58:31,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:58:31,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:58:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:32,302 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:32,303 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 27 treesize of output 15 [2021-02-19 19:58:32,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:32,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:32,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:32,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:58:32,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:32,681 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 38 treesize of output 22 [2021-02-19 19:58:32,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:32,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:32,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:32,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-02-19 19:58:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:33,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:33,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:58:33,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404645644] [2021-02-19 19:58:33,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:58:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:58:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:58:33,090 INFO L87 Difference]: Start difference. First operand 6020 states and 17839 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:37,844 INFO L93 Difference]: Finished difference Result 7997 states and 23449 transitions. [2021-02-19 19:58:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:58:37,846 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:37,856 INFO L225 Difference]: With dead ends: 7997 [2021-02-19 19:58:37,856 INFO L226 Difference]: Without dead ends: 7871 [2021-02-19 19:58:37,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:58:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-02-19 19:58:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 6023. [2021-02-19 19:58:37,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 6022 states have (on average 2.963135171039522) internal successors, (17844), 6022 states have internal predecessors, (17844), 0 states have call successors, (0), 0 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 19:58:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 17844 transitions. [2021-02-19 19:58:37,947 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 17844 transitions. Word has length 37 [2021-02-19 19:58:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:37,947 INFO L480 AbstractCegarLoop]: Abstraction has 6023 states and 17844 transitions. [2021-02-19 19:58:37,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 17844 transitions. [2021-02-19 19:58:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:37,952 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:37,952 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:38,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:38,153 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1670121610, now seen corresponding path program 40 times [2021-02-19 19:58:38,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:38,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503969810] [2021-02-19 19:58:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:38,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503969810] [2021-02-19 19:58:38,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146753298] [2021-02-19 19:58:38,812 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 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 19:58:38,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:58:38,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:58:38,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:39,266 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:58:39,266 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 13 [2021-02-19 19:58:39,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:39,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:39,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:39,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-02-19 19:58:39,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:39,745 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 30 treesize of output 18 [2021-02-19 19:58:39,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:39,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:39,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:39,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-02-19 19:58:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:40,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:40,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:58:40,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423434634] [2021-02-19 19:58:40,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:58:40,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:40,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:58:40,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:58:40,097 INFO L87 Difference]: Start difference. First operand 6023 states and 17844 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:45,044 INFO L93 Difference]: Finished difference Result 7708 states and 22588 transitions. [2021-02-19 19:58:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:58:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:45,055 INFO L225 Difference]: With dead ends: 7708 [2021-02-19 19:58:45,056 INFO L226 Difference]: Without dead ends: 7569 [2021-02-19 19:58:45,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:58:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7569 states. [2021-02-19 19:58:45,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7569 to 6017. [2021-02-19 19:58:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 6016 states have (on average 2.963929521276596) internal successors, (17831), 6016 states have internal predecessors, (17831), 0 states have call successors, (0), 0 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 19:58:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 17831 transitions. [2021-02-19 19:58:45,128 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 17831 transitions. Word has length 37 [2021-02-19 19:58:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:45,128 INFO L480 AbstractCegarLoop]: Abstraction has 6017 states and 17831 transitions. [2021-02-19 19:58:45,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 17831 transitions. [2021-02-19 19:58:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:45,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:45,134 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:45,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-02-19 19:58:45,334 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1479313826, now seen corresponding path program 41 times [2021-02-19 19:58:45,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:45,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942488918] [2021-02-19 19:58:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:46,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942488918] [2021-02-19 19:58:46,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199982523] [2021-02-19 19:58:46,078 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 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 19:58:46,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:58:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:46,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:58:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:46,551 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:46,551 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 27 treesize of output 15 [2021-02-19 19:58:46,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:46,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:46,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:46,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:58:46,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:58:46,927 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 31 treesize of output 19 [2021-02-19 19:58:46,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:46,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:46,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:46,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-02-19 19:58:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:47,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:47,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:58:47,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655784616] [2021-02-19 19:58:47,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:58:47,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:58:47,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:58:47,299 INFO L87 Difference]: Start difference. First operand 6017 states and 17831 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:51,237 INFO L93 Difference]: Finished difference Result 8448 states and 24774 transitions. [2021-02-19 19:58:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:58:51,238 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:51,249 INFO L225 Difference]: With dead ends: 8448 [2021-02-19 19:58:51,250 INFO L226 Difference]: Without dead ends: 8287 [2021-02-19 19:58:51,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:58:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2021-02-19 19:58:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 6014. [2021-02-19 19:58:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 2.964077831365375) internal successors, (17823), 6013 states have internal predecessors, (17823), 0 states have call successors, (0), 0 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 19:58:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 17823 transitions. [2021-02-19 19:58:51,322 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 17823 transitions. Word has length 37 [2021-02-19 19:58:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:51,322 INFO L480 AbstractCegarLoop]: Abstraction has 6014 states and 17823 transitions. [2021-02-19 19:58:51,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 17823 transitions. [2021-02-19 19:58:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:51,327 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:51,327 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:51,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:51,527 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1641319056, now seen corresponding path program 42 times [2021-02-19 19:58:51,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:51,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667435177] [2021-02-19 19:58:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:52,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667435177] [2021-02-19 19:58:52,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123748848] [2021-02-19 19:58:52,175 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 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 19:58:52,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:58:52,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:52,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:58:52,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:52,717 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:58:52,717 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 31 treesize of output 15 [2021-02-19 19:58:52,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:52,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:52,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:52,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:58:53,130 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:58:53,130 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 40 treesize of output 20 [2021-02-19 19:58:53,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:58:53,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:58:53,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:58:53,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:20 [2021-02-19 19:58:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:53,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:53,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:58:53,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300834333] [2021-02-19 19:58:53,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:58:53,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:53,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:58:53,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:58:53,550 INFO L87 Difference]: Start difference. First operand 6014 states and 17823 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:59,182 INFO L93 Difference]: Finished difference Result 8015 states and 23528 transitions. [2021-02-19 19:58:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:58:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:58:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:59,193 INFO L225 Difference]: With dead ends: 8015 [2021-02-19 19:58:59,193 INFO L226 Difference]: Without dead ends: 7814 [2021-02-19 19:58:59,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:58:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7814 states. [2021-02-19 19:58:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7814 to 5999. [2021-02-19 19:58:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5999 states, 5998 states have (on average 2.966822274091364) internal successors, (17795), 5998 states have internal predecessors, (17795), 0 states have call successors, (0), 0 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 19:58:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5999 states to 5999 states and 17795 transitions. [2021-02-19 19:58:59,262 INFO L78 Accepts]: Start accepts. Automaton has 5999 states and 17795 transitions. Word has length 37 [2021-02-19 19:58:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:58:59,262 INFO L480 AbstractCegarLoop]: Abstraction has 5999 states and 17795 transitions. [2021-02-19 19:58:59,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:58:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5999 states and 17795 transitions. [2021-02-19 19:58:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:58:59,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:59,267 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:59,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-02-19 19:58:59,468 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:59,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2136686720, now seen corresponding path program 43 times [2021-02-19 19:58:59,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:59,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863735146] [2021-02-19 19:58:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:00,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863735146] [2021-02-19 19:59:00,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461893446] [2021-02-19 19:59:00,169 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 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 19:59:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:59:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:00,756 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:00,757 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 31 treesize of output 19 [2021-02-19 19:59:00,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:00,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:00,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:00,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-02-19 19:59:00,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:00,927 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 17 [2021-02-19 19:59:00,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:00,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:00,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:00,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-02-19 19:59:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:01,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:01,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-02-19 19:59:01,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937153620] [2021-02-19 19:59:01,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 19:59:01,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 19:59:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:59:01,391 INFO L87 Difference]: Start difference. First operand 5999 states and 17795 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:05,691 INFO L93 Difference]: Finished difference Result 8295 states and 24324 transitions. [2021-02-19 19:59:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:59:05,693 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:05,703 INFO L225 Difference]: With dead ends: 8295 [2021-02-19 19:59:05,703 INFO L226 Difference]: Without dead ends: 8101 [2021-02-19 19:59:05,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:59:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-02-19 19:59:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5972. [2021-02-19 19:59:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 5971 states have (on average 2.9681795344163455) internal successors, (17723), 5971 states have internal predecessors, (17723), 0 states have call successors, (0), 0 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 19:59:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 17723 transitions. [2021-02-19 19:59:05,773 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 17723 transitions. Word has length 37 [2021-02-19 19:59:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:05,773 INFO L480 AbstractCegarLoop]: Abstraction has 5972 states and 17723 transitions. [2021-02-19 19:59:05,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 17723 transitions. [2021-02-19 19:59:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:05,778 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:05,778 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:05,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:05,979 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1707925692, now seen corresponding path program 44 times [2021-02-19 19:59:05,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:05,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832282839] [2021-02-19 19:59:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:06,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832282839] [2021-02-19 19:59:06,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240084709] [2021-02-19 19:59:06,729 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:06,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:59:06,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:59:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:59:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:07,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:07,242 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 25 treesize of output 13 [2021-02-19 19:59:07,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:07,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:07,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:07,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 19:59:07,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:07,654 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 17 [2021-02-19 19:59:07,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:07,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:07,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:07,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:59:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:08,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:08,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:59:08,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562628805] [2021-02-19 19:59:08,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:59:08,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:59:08,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:59:08,128 INFO L87 Difference]: Start difference. First operand 5972 states and 17723 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:13,816 INFO L93 Difference]: Finished difference Result 7746 states and 22719 transitions. [2021-02-19 19:59:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:59:13,819 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:13,830 INFO L225 Difference]: With dead ends: 7746 [2021-02-19 19:59:13,830 INFO L226 Difference]: Without dead ends: 7617 [2021-02-19 19:59:13,830 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:59:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7617 states. [2021-02-19 19:59:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7617 to 5981. [2021-02-19 19:59:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5981 states, 5980 states have (on average 2.9672240802675587) internal successors, (17744), 5980 states have internal predecessors, (17744), 0 states have call successors, (0), 0 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 19:59:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5981 states to 5981 states and 17744 transitions. [2021-02-19 19:59:13,900 INFO L78 Accepts]: Start accepts. Automaton has 5981 states and 17744 transitions. Word has length 37 [2021-02-19 19:59:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:13,900 INFO L480 AbstractCegarLoop]: Abstraction has 5981 states and 17744 transitions. [2021-02-19 19:59:13,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5981 states and 17744 transitions. [2021-02-19 19:59:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:13,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:13,906 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:14,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 19:59:14,110 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash -36438314, now seen corresponding path program 45 times [2021-02-19 19:59:14,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:14,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569188596] [2021-02-19 19:59:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:15,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569188596] [2021-02-19 19:59:15,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745907867] [2021-02-19 19:59:15,112 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 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 19:59:15,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:59:15,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:59:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:59:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:15,693 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:15,694 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 27 treesize of output 15 [2021-02-19 19:59:15,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:15,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:15,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:15,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:59:16,172 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:16,172 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 36 treesize of output 20 [2021-02-19 19:59:16,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:16,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:16,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:16,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-02-19 19:59:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:16,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:16,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:59:16,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063738074] [2021-02-19 19:59:16,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:59:16,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:16,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:59:16,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:59:16,659 INFO L87 Difference]: Start difference. First operand 5981 states and 17744 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:22,974 INFO L93 Difference]: Finished difference Result 7988 states and 23420 transitions. [2021-02-19 19:59:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:59:22,976 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:22,986 INFO L225 Difference]: With dead ends: 7988 [2021-02-19 19:59:22,986 INFO L226 Difference]: Without dead ends: 7862 [2021-02-19 19:59:22,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=227, Invalid=3313, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:59:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7862 states. [2021-02-19 19:59:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7862 to 5984. [2021-02-19 19:59:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5984 states, 5983 states have (on average 2.9665719538692965) internal successors, (17749), 5983 states have internal predecessors, (17749), 0 states have call successors, (0), 0 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 19:59:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5984 states to 5984 states and 17749 transitions. [2021-02-19 19:59:23,055 INFO L78 Accepts]: Start accepts. Automaton has 5984 states and 17749 transitions. Word has length 37 [2021-02-19 19:59:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:23,055 INFO L480 AbstractCegarLoop]: Abstraction has 5984 states and 17749 transitions. [2021-02-19 19:59:23,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5984 states and 17749 transitions. [2021-02-19 19:59:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:23,061 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:23,061 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:23,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:23,261 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2077815826, now seen corresponding path program 46 times [2021-02-19 19:59:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:23,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292528994] [2021-02-19 19:59:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:24,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292528994] [2021-02-19 19:59:24,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144254489] [2021-02-19 19:59:24,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:59:24,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:59:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:59:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:59:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:24,667 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:59:24,667 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 13 [2021-02-19 19:59:24,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:24,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:24,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:24,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-02-19 19:59:25,275 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:25,276 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 30 treesize of output 18 [2021-02-19 19:59:25,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:25,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:25,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:25,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-02-19 19:59:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:25,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:25,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:59:25,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931483598] [2021-02-19 19:59:25,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:59:25,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:59:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:59:25,725 INFO L87 Difference]: Start difference. First operand 5984 states and 17749 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:31,598 INFO L93 Difference]: Finished difference Result 7828 states and 22958 transitions. [2021-02-19 19:59:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:59:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:31,610 INFO L225 Difference]: With dead ends: 7828 [2021-02-19 19:59:31,610 INFO L226 Difference]: Without dead ends: 7689 [2021-02-19 19:59:31,610 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:59:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-02-19 19:59:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 5978. [2021-02-19 19:59:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.967374937259495) internal successors, (17736), 5977 states have internal predecessors, (17736), 0 states have call successors, (0), 0 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 19:59:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 17736 transitions. [2021-02-19 19:59:31,674 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 17736 transitions. Word has length 37 [2021-02-19 19:59:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:31,674 INFO L480 AbstractCegarLoop]: Abstraction has 5978 states and 17736 transitions. [2021-02-19 19:59:31,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 17736 transitions. [2021-02-19 19:59:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:31,679 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:31,679 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:31,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:31,881 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1071619610, now seen corresponding path program 47 times [2021-02-19 19:59:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:31,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55153975] [2021-02-19 19:59:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:32,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55153975] [2021-02-19 19:59:32,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289838840] [2021-02-19 19:59:32,842 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 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 19:59:32,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:59:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:59:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:59:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:33,489 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:33,490 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 27 treesize of output 15 [2021-02-19 19:59:33,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:33,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:33,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:33,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:59:33,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:33,964 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 17 [2021-02-19 19:59:33,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:33,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:33,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:33,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:59:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:34,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:34,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 19:59:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320845545] [2021-02-19 19:59:34,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:59:34,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:59:34,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:59:34,255 INFO L87 Difference]: Start difference. First operand 5978 states and 17736 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:36,289 INFO L93 Difference]: Finished difference Result 6095 states and 18001 transitions. [2021-02-19 19:59:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:59:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:36,298 INFO L225 Difference]: With dead ends: 6095 [2021-02-19 19:59:36,298 INFO L226 Difference]: Without dead ends: 5975 [2021-02-19 19:59:36,298 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:59:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2021-02-19 19:59:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5975. [2021-02-19 19:59:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 2.9675259457649816) internal successors, (17728), 5974 states have internal predecessors, (17728), 0 states have call successors, (0), 0 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 19:59:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 17728 transitions. [2021-02-19 19:59:36,352 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 17728 transitions. Word has length 37 [2021-02-19 19:59:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:36,353 INFO L480 AbstractCegarLoop]: Abstraction has 5975 states and 17728 transitions. [2021-02-19 19:59:36,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 17728 transitions. [2021-02-19 19:59:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:36,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:36,357 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:36,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-02-19 19:59:36,561 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1233624840, now seen corresponding path program 48 times [2021-02-19 19:59:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:36,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698901645] [2021-02-19 19:59:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:37,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698901645] [2021-02-19 19:59:37,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150466583] [2021-02-19 19:59:37,355 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 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 19:59:37,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:59:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:59:37,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:59:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:37,926 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:59:37,926 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 31 treesize of output 15 [2021-02-19 19:59:37,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:37,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:37,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:37,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 19:59:38,409 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:59:38,410 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 42 treesize of output 22 [2021-02-19 19:59:38,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:38,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:38,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:38,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:20 [2021-02-19 19:59:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:38,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:38,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:59:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356862355] [2021-02-19 19:59:38,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:59:38,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:38,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:59:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:59:38,953 INFO L87 Difference]: Start difference. First operand 5975 states and 17728 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:45,905 INFO L93 Difference]: Finished difference Result 7989 states and 23436 transitions. [2021-02-19 19:59:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:59:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:45,916 INFO L225 Difference]: With dead ends: 7989 [2021-02-19 19:59:45,916 INFO L226 Difference]: Without dead ends: 7791 [2021-02-19 19:59:45,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:59:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7791 states. [2021-02-19 19:59:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7791 to 5963. [2021-02-19 19:59:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.9686346863468636) internal successors, (17699), 5962 states have internal predecessors, (17699), 0 states have call successors, (0), 0 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 19:59:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 17699 transitions. [2021-02-19 19:59:45,980 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 17699 transitions. Word has length 37 [2021-02-19 19:59:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:45,980 INFO L480 AbstractCegarLoop]: Abstraction has 5963 states and 17699 transitions. [2021-02-19 19:59:45,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 17699 transitions. [2021-02-19 19:59:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:45,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:45,986 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:46,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:46,186 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:46,186 INFO L82 PathProgramCache]: Analyzing trace with hash -846664614, now seen corresponding path program 49 times [2021-02-19 19:59:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:46,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662989934] [2021-02-19 19:59:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:47,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662989934] [2021-02-19 19:59:47,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194169938] [2021-02-19 19:59:47,031 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:59:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:47,536 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:59:47,536 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 31 treesize of output 15 [2021-02-19 19:59:47,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:47,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:47,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:47,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-02-19 19:59:48,091 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:48,092 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 17 [2021-02-19 19:59:48,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:48,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:48,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:48,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:59:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:48,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:48,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:59:48,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407529075] [2021-02-19 19:59:48,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:59:48,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:59:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:59:48,669 INFO L87 Difference]: Start difference. First operand 5963 states and 17699 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:52,791 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-02-19 19:59:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:59:55,300 INFO L93 Difference]: Finished difference Result 7764 states and 22783 transitions. [2021-02-19 19:59:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:59:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:59:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:59:55,311 INFO L225 Difference]: With dead ends: 7764 [2021-02-19 19:59:55,311 INFO L226 Difference]: Without dead ends: 7635 [2021-02-19 19:59:55,312 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=264, Invalid=3396, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:59:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7635 states. [2021-02-19 19:59:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7635 to 5960. [2021-02-19 19:59:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 2.9687867091793927) internal successors, (17691), 5959 states have internal predecessors, (17691), 0 states have call successors, (0), 0 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 19:59:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 17691 transitions. [2021-02-19 19:59:55,376 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 17691 transitions. Word has length 37 [2021-02-19 19:59:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:55,376 INFO L480 AbstractCegarLoop]: Abstraction has 5960 states and 17691 transitions. [2021-02-19 19:59:55,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 19:59:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 17691 transitions. [2021-02-19 19:59:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:59:55,381 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:55,381 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:55,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 19:59:55,581 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1703938676, now seen corresponding path program 50 times [2021-02-19 19:59:55,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:55,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509285705] [2021-02-19 19:59:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:56,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509285705] [2021-02-19 19:59:56,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855302915] [2021-02-19 19:59:56,542 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 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 19:59:56,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:59:56,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:59:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:59:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:57,058 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:57,058 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 27 treesize of output 15 [2021-02-19 19:59:57,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:57,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:57,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:57,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-02-19 19:59:57,686 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:59:57,686 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 17 [2021-02-19 19:59:57,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:59:57,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:59:57,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:59:57,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 19:59:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:58,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:58,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 19:59:58,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985427585] [2021-02-19 19:59:58,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:59:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:59:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:59:58,282 INFO L87 Difference]: Start difference. First operand 5960 states and 17691 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:02,877 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 20:00:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:05,711 INFO L93 Difference]: Finished difference Result 8003 states and 23476 transitions. [2021-02-19 20:00:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:00:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:00:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:05,723 INFO L225 Difference]: With dead ends: 8003 [2021-02-19 20:00:05,723 INFO L226 Difference]: Without dead ends: 7877 [2021-02-19 20:00:05,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:00:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7877 states. [2021-02-19 20:00:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7877 to 5963. [2021-02-19 20:00:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.9681314994968133) internal successors, (17696), 5962 states have internal predecessors, (17696), 0 states have call successors, (0), 0 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 20:00:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 17696 transitions. [2021-02-19 20:00:05,789 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 17696 transitions. Word has length 37 [2021-02-19 20:00:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:05,790 INFO L480 AbstractCegarLoop]: Abstraction has 5963 states and 17696 transitions. [2021-02-19 20:00:05,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 17696 transitions. [2021-02-19 20:00:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:00:05,823 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:05,823 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:06,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 20:00:06,023 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash -476774480, now seen corresponding path program 51 times [2021-02-19 20:00:06,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:06,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999492834] [2021-02-19 20:00:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:06,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999492834] [2021-02-19 20:00:06,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843773196] [2021-02-19 20:00:06,897 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 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 20:00:06,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:00:06,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:06,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:00:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:07,482 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:07,483 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 31 treesize of output 19 [2021-02-19 20:00:07,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:07,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:07,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:07,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-02-19 20:00:08,287 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:08,287 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 44 treesize of output 24 [2021-02-19 20:00:08,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:08,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:08,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:08,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-02-19 20:00:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:08,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:08,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:00:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161552339] [2021-02-19 20:00:08,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:00:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:00:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:00:08,786 INFO L87 Difference]: Start difference. First operand 5963 states and 17696 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:16,677 INFO L93 Difference]: Finished difference Result 7895 states and 23163 transitions. [2021-02-19 20:00:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:00:16,679 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:00:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:16,688 INFO L225 Difference]: With dead ends: 7895 [2021-02-19 20:00:16,688 INFO L226 Difference]: Without dead ends: 7756 [2021-02-19 20:00:16,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:00:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7756 states. [2021-02-19 20:00:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7756 to 5957. [2021-02-19 20:00:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5957 states, 5956 states have (on average 2.968938885157824) internal successors, (17683), 5956 states have internal predecessors, (17683), 0 states have call successors, (0), 0 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 20:00:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5957 states to 5957 states and 17683 transitions. [2021-02-19 20:00:16,758 INFO L78 Accepts]: Start accepts. Automaton has 5957 states and 17683 transitions. Word has length 37 [2021-02-19 20:00:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:16,758 INFO L480 AbstractCegarLoop]: Abstraction has 5957 states and 17683 transitions. [2021-02-19 20:00:16,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5957 states and 17683 transitions. [2021-02-19 20:00:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:00:16,763 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:16,763 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:16,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:16,966 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash 668757380, now seen corresponding path program 52 times [2021-02-19 20:00:16,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:16,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022243981] [2021-02-19 20:00:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022243981] [2021-02-19 20:00:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897161081] [2021-02-19 20:00:17,863 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 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 20:00:17,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:00:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:00:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:18,462 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:00:18,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-02-19 20:00:18,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:18,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:18,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:18,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-02-19 20:00:19,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:19,112 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 17 [2021-02-19 20:00:19,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:19,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:19,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:19,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 20:00:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:19,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:19,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:00:19,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357464321] [2021-02-19 20:00:19,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:00:19,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:00:19,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:00:19,761 INFO L87 Difference]: Start difference. First operand 5957 states and 17683 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:21,403 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 20:00:24,255 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:00:24,514 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-02-19 20:00:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:27,888 INFO L93 Difference]: Finished difference Result 8183 states and 24005 transitions. [2021-02-19 20:00:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:00:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:00:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:27,901 INFO L225 Difference]: With dead ends: 8183 [2021-02-19 20:00:27,901 INFO L226 Difference]: Without dead ends: 8057 [2021-02-19 20:00:27,902 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 20:00:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-02-19 20:00:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 5963. [2021-02-19 20:00:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.9681314994968133) internal successors, (17696), 5962 states have internal predecessors, (17696), 0 states have call successors, (0), 0 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 20:00:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 17696 transitions. [2021-02-19 20:00:27,975 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 17696 transitions. Word has length 37 [2021-02-19 20:00:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:27,975 INFO L480 AbstractCegarLoop]: Abstraction has 5963 states and 17696 transitions. [2021-02-19 20:00:27,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 17696 transitions. [2021-02-19 20:00:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:00:27,980 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:27,980 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:28,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:28,181 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1511955776, now seen corresponding path program 53 times [2021-02-19 20:00:28,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:28,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822923792] [2021-02-19 20:00:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:29,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822923792] [2021-02-19 20:00:29,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577619457] [2021-02-19 20:00:29,202 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 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 20:00:29,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:00:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 20:00:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:29,797 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:29,797 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 27 treesize of output 15 [2021-02-19 20:00:29,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:29,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:29,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:29,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-02-19 20:00:30,509 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 20:00:30,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:30,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:30,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:30,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-02-19 20:00:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:30,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:30,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:00:30,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151505950] [2021-02-19 20:00:31,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:00:31,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:00:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:00:31,000 INFO L87 Difference]: Start difference. First operand 5963 states and 17696 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:35,489 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-02-19 20:00:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:38,228 INFO L93 Difference]: Finished difference Result 8363 states and 24551 transitions. [2021-02-19 20:00:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 20:00:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:00:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:38,240 INFO L225 Difference]: With dead ends: 8363 [2021-02-19 20:00:38,240 INFO L226 Difference]: Without dead ends: 8208 [2021-02-19 20:00:38,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=258, Invalid=3282, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:00:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8208 states. [2021-02-19 20:00:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8208 to 5954. [2021-02-19 20:00:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5954 states, 5953 states have (on average 2.9690912145136905) internal successors, (17675), 5953 states have internal predecessors, (17675), 0 states have call successors, (0), 0 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 20:00:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5954 states to 5954 states and 17675 transitions. [2021-02-19 20:00:38,305 INFO L78 Accepts]: Start accepts. Automaton has 5954 states and 17675 transitions. Word has length 37 [2021-02-19 20:00:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:38,306 INFO L480 AbstractCegarLoop]: Abstraction has 5954 states and 17675 transitions. [2021-02-19 20:00:38,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5954 states and 17675 transitions. [2021-02-19 20:00:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:00:38,311 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:38,311 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:38,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:38,512 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 506752150, now seen corresponding path program 54 times [2021-02-19 20:00:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:38,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420934856] [2021-02-19 20:00:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420934856] [2021-02-19 20:00:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542855285] [2021-02-19 20:00:39,468 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 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 20:00:39,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:00:39,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 20:00:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:40,102 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:00:40,102 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 31 treesize of output 15 [2021-02-19 20:00:40,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:40,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:40,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:40,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-02-19 20:00:40,860 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:00:40,860 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 40 treesize of output 20 [2021-02-19 20:00:40,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:40,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:40,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:40,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-02-19 20:00:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:41,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:41,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:00:41,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384221561] [2021-02-19 20:00:41,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:00:41,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:00:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:00:41,556 INFO L87 Difference]: Start difference. First operand 5954 states and 17675 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:46,686 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 20:00:46,969 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-02-19 20:00:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:50,258 INFO L93 Difference]: Finished difference Result 8000 states and 23505 transitions. [2021-02-19 20:00:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:00:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:00:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:50,271 INFO L225 Difference]: With dead ends: 8000 [2021-02-19 20:00:50,271 INFO L226 Difference]: Without dead ends: 7811 [2021-02-19 20:00:50,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 20:00:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2021-02-19 20:00:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 5921. [2021-02-19 20:00:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5921 states, 5920 states have (on average 2.9717905405405407) internal successors, (17593), 5920 states have internal predecessors, (17593), 0 states have call successors, (0), 0 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 20:00:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5921 states to 5921 states and 17593 transitions. [2021-02-19 20:00:50,336 INFO L78 Accepts]: Start accepts. Automaton has 5921 states and 17593 transitions. Word has length 37 [2021-02-19 20:00:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:50,336 INFO L480 AbstractCegarLoop]: Abstraction has 5921 states and 17593 transitions. [2021-02-19 20:00:50,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5921 states and 17593 transitions. [2021-02-19 20:00:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:00:50,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:50,341 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:50,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 20:00:50,542 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -626239488, now seen corresponding path program 55 times [2021-02-19 20:00:50,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:50,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968176889] [2021-02-19 20:00:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:51,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968176889] [2021-02-19 20:00:51,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416494047] [2021-02-19 20:00:51,496 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 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 20:00:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:00:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:52,118 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:52,118 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 27 treesize of output 15 [2021-02-19 20:00:52,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:52,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:52,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:52,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-02-19 20:00:52,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:52,894 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 17 [2021-02-19 20:00:52,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:52,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:52,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:52,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 20:00:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:53,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:53,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:00:53,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346809240] [2021-02-19 20:00:53,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:00:53,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:00:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:00:53,643 INFO L87 Difference]: Start difference. First operand 5921 states and 17593 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:00:57,161 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 20:00:58,221 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:00:58,600 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 20:00:58,916 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-02-19 20:00:59,715 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-02-19 20:01:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:03,735 INFO L93 Difference]: Finished difference Result 8477 states and 25056 transitions. [2021-02-19 20:01:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 20:01:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:01:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:03,747 INFO L225 Difference]: With dead ends: 8477 [2021-02-19 20:01:03,747 INFO L226 Difference]: Without dead ends: 8429 [2021-02-19 20:01:03,747 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=258, Invalid=3524, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:01:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8429 states. [2021-02-19 20:01:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8429 to 5920. [2021-02-19 20:01:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 5919 states have (on average 2.971785774624092) internal successors, (17590), 5919 states have internal predecessors, (17590), 0 states have call successors, (0), 0 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 20:01:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 17590 transitions. [2021-02-19 20:01:03,818 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 17590 transitions. Word has length 37 [2021-02-19 20:01:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:03,818 INFO L480 AbstractCegarLoop]: Abstraction has 5920 states and 17590 transitions. [2021-02-19 20:01:03,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:01:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 17590 transitions. [2021-02-19 20:01:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:01:03,824 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:03,824 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:04,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:01:04,026 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1488014652, now seen corresponding path program 56 times [2021-02-19 20:01:04,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:04,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466009989] [2021-02-19 20:01:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466009989] [2021-02-19 20:01:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403475569] [2021-02-19 20:01:05,010 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 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 20:01:05,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:01:05,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:01:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:05,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:05,667 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 27 treesize of output 15 [2021-02-19 20:01:05,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:05,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:05,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:05,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-02-19 20:01:06,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:06,232 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 27 treesize of output 15 [2021-02-19 20:01:06,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:06,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:06,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:06,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:18 [2021-02-19 20:01:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:06,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:06,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 20:01:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432040053] [2021-02-19 20:01:06,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:01:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:01:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:01:06,738 INFO L87 Difference]: Start difference. First operand 5920 states and 17590 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:01:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:13,242 INFO L93 Difference]: Finished difference Result 8732 states and 25814 transitions. [2021-02-19 20:01:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 20:01:13,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:01:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:13,257 INFO L225 Difference]: With dead ends: 8732 [2021-02-19 20:01:13,257 INFO L226 Difference]: Without dead ends: 8684 [2021-02-19 20:01:13,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=229, Invalid=2741, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 20:01:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-02-19 20:01:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 5917. [2021-02-19 20:01:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5917 states, 5916 states have (on average 2.971940500338066) internal successors, (17582), 5916 states have internal predecessors, (17582), 0 states have call successors, (0), 0 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 20:01:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5917 states to 5917 states and 17582 transitions. [2021-02-19 20:01:13,329 INFO L78 Accepts]: Start accepts. Automaton has 5917 states and 17582 transitions. Word has length 37 [2021-02-19 20:01:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:13,329 INFO L480 AbstractCegarLoop]: Abstraction has 5917 states and 17582 transitions. [2021-02-19 20:01:13,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:01:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5917 states and 17582 transitions. [2021-02-19 20:01:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:01:13,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:13,335 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:13,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 20:01:13,535 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash -343247264, now seen corresponding path program 57 times [2021-02-19 20:01:13,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:13,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695066037] [2021-02-19 20:01:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:14,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695066037] [2021-02-19 20:01:14,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438677903] [2021-02-19 20:01:14,971 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 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 20:01:14,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:01:14,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:14,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 20:01:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:01:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:01:16,173 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 27 treesize of output 13 [2021-02-19 20:01:16,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:16,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:16,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:16,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:29 [2021-02-19 20:01:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:01:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:01:16,505 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 17 [2021-02-19 20:01:16,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:16,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:16,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:16,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:20 [2021-02-19 20:01:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:17,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:17,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-02-19 20:01:17,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244982391] [2021-02-19 20:01:17,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:01:17,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:01:17,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:01:17,295 INFO L87 Difference]: Start difference. First operand 5917 states and 17582 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:01:18,580 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:01:19,898 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 20:01:20,212 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-02-19 20:01:21,029 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-02-19 20:01:21,273 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 20:01:21,902 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-02-19 20:01:22,119 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-02-19 20:01:22,777 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-02-19 20:01:23,924 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-02-19 20:01:24,306 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-02-19 20:01:24,498 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 20:01:25,150 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-02-19 20:01:25,937 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-02-19 20:01:27,061 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 20:01:27,370 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-02-19 20:01:28,810 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-02-19 20:01:30,845 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 20:01:31,176 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 20:01:33,583 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:01:34,011 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-02-19 20:01:35,615 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-19 20:01:35,885 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2021-02-19 20:01:37,134 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-02-19 20:01:37,738 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 20:01:38,256 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:01:38,893 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 20:01:40,066 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:01:40,620 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 20:01:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:41,217 INFO L93 Difference]: Finished difference Result 15850 states and 46165 transitions. [2021-02-19 20:01:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-02-19 20:01:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:01:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:41,240 INFO L225 Difference]: With dead ends: 15850 [2021-02-19 20:01:41,240 INFO L226 Difference]: Without dead ends: 15667 [2021-02-19 20:01:41,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=1487, Invalid=14263, Unknown=0, NotChecked=0, Total=15750 [2021-02-19 20:01:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15667 states. [2021-02-19 20:01:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15667 to 6273. [2021-02-19 20:01:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 6272 states have (on average 2.963966836734694) internal successors, (18590), 6272 states have internal predecessors, (18590), 0 states have call successors, (0), 0 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 20:01:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 18590 transitions. [2021-02-19 20:01:41,343 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 18590 transitions. Word has length 37 [2021-02-19 20:01:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:41,344 INFO L480 AbstractCegarLoop]: Abstraction has 6273 states and 18590 transitions. [2021-02-19 20:01:41,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:01:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 18590 transitions. [2021-02-19 20:01:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:01:41,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:41,351 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:41,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 20:01:41,555 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1353058976, now seen corresponding path program 58 times [2021-02-19 20:01:41,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:41,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798317942] [2021-02-19 20:01:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:42,057 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:01:42,344 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 20:01:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:43,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798317942] [2021-02-19 20:01:43,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184242197] [2021-02-19 20:01:43,215 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 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 20:01:43,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:01:43,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:01:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:44,544 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:44,545 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 25 treesize of output 13 [2021-02-19 20:01:44,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:44,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:44,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:44,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 20:01:44,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:44,860 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 17 [2021-02-19 20:01:44,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:44,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:44,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:44,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 20:01:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:45,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:45,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:01:45,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921509634] [2021-02-19 20:01:45,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:01:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:01:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:01:45,749 INFO L87 Difference]: Start difference. First operand 6273 states and 18590 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:01:48,578 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 20:01:50,618 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-02-19 20:01:53,280 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 20:01:54,602 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 20:01:56,782 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 20:01:57,105 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 20:01:57,621 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 20:02:00,053 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-02-19 20:02:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:03,235 INFO L93 Difference]: Finished difference Result 11927 states and 34961 transitions. [2021-02-19 20:02:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:02:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:02:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:03,250 INFO L225 Difference]: With dead ends: 11927 [2021-02-19 20:02:03,250 INFO L226 Difference]: Without dead ends: 11618 [2021-02-19 20:02:03,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=438, Invalid=7044, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 20:02:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11618 states. [2021-02-19 20:02:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11618 to 6271. [2021-02-19 20:02:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 2.965231259968102) internal successors, (18592), 6270 states have internal predecessors, (18592), 0 states have call successors, (0), 0 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 20:02:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 18592 transitions. [2021-02-19 20:02:03,342 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 18592 transitions. Word has length 37 [2021-02-19 20:02:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:03,342 INFO L480 AbstractCegarLoop]: Abstraction has 6271 states and 18592 transitions. [2021-02-19 20:02:03,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 18592 transitions. [2021-02-19 20:02:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:02:03,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:03,350 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:03,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 20:02:03,556 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -456295188, now seen corresponding path program 59 times [2021-02-19 20:02:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:03,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459178031] [2021-02-19 20:02:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:04,067 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:02:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:05,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459178031] [2021-02-19 20:02:05,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373441021] [2021-02-19 20:02:05,183 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 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 20:02:05,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:02:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:02:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:06,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:06,158 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 33 treesize of output 21 [2021-02-19 20:02:06,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:06,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:06,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:06,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-02-19 20:02:06,439 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:06,439 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 31 treesize of output 19 [2021-02-19 20:02:06,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:06,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:06,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:06,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-02-19 20:02:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:07,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:07,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 20:02:07,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925748920] [2021-02-19 20:02:07,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:02:07,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:07,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:02:07,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:02:07,155 INFO L87 Difference]: Start difference. First operand 6271 states and 18592 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:09,318 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 20:02:10,137 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 20:02:11,026 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 20:02:11,344 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 20:02:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:15,974 INFO L93 Difference]: Finished difference Result 9986 states and 29262 transitions. [2021-02-19 20:02:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:02:15,978 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:02:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:15,992 INFO L225 Difference]: With dead ends: 9986 [2021-02-19 20:02:15,992 INFO L226 Difference]: Without dead ends: 9783 [2021-02-19 20:02:15,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 20:02:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9783 states. [2021-02-19 20:02:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9783 to 6235. [2021-02-19 20:02:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 6234 states have (on average 2.966474173885146) internal successors, (18493), 6234 states have internal predecessors, (18493), 0 states have call successors, (0), 0 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 20:02:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 18493 transitions. [2021-02-19 20:02:16,076 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 18493 transitions. Word has length 37 [2021-02-19 20:02:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:16,076 INFO L480 AbstractCegarLoop]: Abstraction has 6235 states and 18493 transitions. [2021-02-19 20:02:16,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 18493 transitions. [2021-02-19 20:02:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:02:16,082 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:16,082 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:16,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:02:16,282 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -686985784, now seen corresponding path program 60 times [2021-02-19 20:02:16,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:16,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857203948] [2021-02-19 20:02:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:16,795 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:02:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:17,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857203948] [2021-02-19 20:02:17,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611726475] [2021-02-19 20:02:17,794 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 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 20:02:17,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:02:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 20:02:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:02:18,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:02:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:02:18,940 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 38 treesize of output 22 [2021-02-19 20:02:18,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:18,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:18,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:18,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-02-19 20:02:19,202 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:19,203 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 17 [2021-02-19 20:02:19,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:19,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:19,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:19,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-02-19 20:02:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:19,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:19,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 20:02:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340711380] [2021-02-19 20:02:19,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:02:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:02:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:02:19,832 INFO L87 Difference]: Start difference. First operand 6235 states and 18493 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:21,522 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-02-19 20:02:21,736 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2021-02-19 20:02:22,340 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 20:02:23,714 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-02-19 20:02:23,917 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 20:02:24,271 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-02-19 20:02:24,824 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-02-19 20:02:25,267 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-02-19 20:02:27,453 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 20:02:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:28,216 INFO L93 Difference]: Finished difference Result 10681 states and 31078 transitions. [2021-02-19 20:02:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:02:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:02:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:28,234 INFO L225 Difference]: With dead ends: 10681 [2021-02-19 20:02:28,234 INFO L226 Difference]: Without dead ends: 10539 [2021-02-19 20:02:28,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=524, Invalid=4588, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 20:02:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10539 states. [2021-02-19 20:02:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10539 to 6304. [2021-02-19 20:02:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 2.9603363477709026) internal successors, (18659), 6303 states have internal predecessors, (18659), 0 states have call successors, (0), 0 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 20:02:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 18659 transitions. [2021-02-19 20:02:28,348 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 18659 transitions. Word has length 37 [2021-02-19 20:02:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:28,348 INFO L480 AbstractCegarLoop]: Abstraction has 6304 states and 18659 transitions. [2021-02-19 20:02:28,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 18659 transitions. [2021-02-19 20:02:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:02:28,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:28,353 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:28,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 20:02:28,555 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1009320456, now seen corresponding path program 61 times [2021-02-19 20:02:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:28,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315535366] [2021-02-19 20:02:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:29,070 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:02:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:30,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315535366] [2021-02-19 20:02:30,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702464147] [2021-02-19 20:02:30,098 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 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 20:02:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:02:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:31,685 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:31,685 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 25 treesize of output 13 [2021-02-19 20:02:31,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:31,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:31,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:31,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 20:02:32,064 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:32,064 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 17 [2021-02-19 20:02:32,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:32,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:32,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:32,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 20:02:32,898 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-02-19 20:02:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:33,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:33,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-02-19 20:02:33,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679408360] [2021-02-19 20:02:33,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:02:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:02:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:02:33,123 INFO L87 Difference]: Start difference. First operand 6304 states and 18659 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:34,182 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 20:02:36,186 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 20:02:36,421 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 20:02:37,158 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 20:02:37,747 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 20:02:38,238 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 20:02:38,630 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 20:02:39,096 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 20:02:42,163 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 20:02:42,419 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:02:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:43,970 INFO L93 Difference]: Finished difference Result 8182 states and 23982 transitions. [2021-02-19 20:02:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 20:02:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:02:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:43,987 INFO L225 Difference]: With dead ends: 8182 [2021-02-19 20:02:43,987 INFO L226 Difference]: Without dead ends: 7990 [2021-02-19 20:02:43,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:02:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-02-19 20:02:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6244. [2021-02-19 20:02:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6244 states, 6243 states have (on average 2.9646003523946822) internal successors, (18508), 6243 states have internal predecessors, (18508), 0 states have call successors, (0), 0 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 20:02:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6244 states to 6244 states and 18508 transitions. [2021-02-19 20:02:44,061 INFO L78 Accepts]: Start accepts. Automaton has 6244 states and 18508 transitions. Word has length 37 [2021-02-19 20:02:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:44,062 INFO L480 AbstractCegarLoop]: Abstraction has 6244 states and 18508 transitions. [2021-02-19 20:02:44,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 6244 states and 18508 transitions. [2021-02-19 20:02:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:02:44,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:44,067 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:44,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 20:02:44,268 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1115746812, now seen corresponding path program 62 times [2021-02-19 20:02:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:44,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630104642] [2021-02-19 20:02:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:44,655 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 20:02:44,806 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:02:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:45,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630104642] [2021-02-19 20:02:45,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280086889] [2021-02-19 20:02:45,858 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 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 20:02:45,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:02:45,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:45,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:02:45,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:46,840 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:46,840 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 27 treesize of output 15 [2021-02-19 20:02:46,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:46,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:46,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:46,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 20:02:47,652 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-02-19 20:02:47,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:47,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:47,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:47,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 20:02:48,433 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-02-19 20:02:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:48,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:48,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:02:48,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10403348] [2021-02-19 20:02:48,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:02:48,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:02:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:02:48,615 INFO L87 Difference]: Start difference. First operand 6244 states and 18508 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:02:49,617 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 20:02:50,110 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:02:50,551 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 20:02:50,783 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-02-19 20:02:51,487 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 20:02:52,983 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 20:02:53,564 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-02-19 20:02:53,844 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-02-19 20:02:54,109 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-02-19 20:02:54,353 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-02-19 20:02:54,763 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-02-19 20:02:55,105 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 20:02:55,505 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-02-19 20:02:56,416 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-02-19 20:02:56,687 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-02-19 20:02:56,931 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 20:02:57,582 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2021-02-19 20:02:59,247 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 20:02:59,657 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 20:02:59,913 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 20:03:00,911 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-02-19 20:03:01,482 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-02-19 20:03:02,092 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:03:02,637 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 20:03:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:03:03,420 INFO L93 Difference]: Finished difference Result 11491 states and 33364 transitions. [2021-02-19 20:03:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 20:03:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:03:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:03:03,442 INFO L225 Difference]: With dead ends: 11491 [2021-02-19 20:03:03,442 INFO L226 Difference]: Without dead ends: 11308 [2021-02-19 20:03:03,442 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=653, Invalid=6319, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 20:03:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11308 states. [2021-02-19 20:03:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11308 to 6274. [2021-02-19 20:03:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 6273 states have (on average 2.961740793878527) internal successors, (18579), 6273 states have internal predecessors, (18579), 0 states have call successors, (0), 0 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 20:03:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 18579 transitions. [2021-02-19 20:03:03,541 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 18579 transitions. Word has length 37 [2021-02-19 20:03:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:03:03,541 INFO L480 AbstractCegarLoop]: Abstraction has 6274 states and 18579 transitions. [2021-02-19 20:03:03,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:03:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 18579 transitions. [2021-02-19 20:03:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:03:03,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:03:03,547 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:03:03,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:03,748 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:03:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:03:03,748 INFO L82 PathProgramCache]: Analyzing trace with hash 580559428, now seen corresponding path program 63 times [2021-02-19 20:03:03,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:03:03,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784381506] [2021-02-19 20:03:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:03:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:04,151 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 20:03:04,324 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:03:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784381506] [2021-02-19 20:03:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575726549] [2021-02-19 20:03:05,622 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 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 20:03:05,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:03:05,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:03:05,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:03:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:06,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:06,754 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 27 treesize of output 15 [2021-02-19 20:03:06,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:06,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:06,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:06,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 20:03:07,682 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:07,682 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 38 treesize of output 22 [2021-02-19 20:03:07,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:07,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:07,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:07,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-02-19 20:03:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:08,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:08,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:03:08,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407733767] [2021-02-19 20:03:08,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:03:08,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:08,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:03:08,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:03:08,713 INFO L87 Difference]: Start difference. First operand 6274 states and 18579 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:03:09,928 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 20:03:10,894 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 20:03:11,823 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 20:03:12,155 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 20:03:12,403 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 20:03:12,697 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 20:03:13,493 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-02-19 20:03:15,764 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:03:16,228 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 20:03:16,717 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 20:03:18,332 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 20:03:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:03:20,474 INFO L93 Difference]: Finished difference Result 8320 states and 24360 transitions. [2021-02-19 20:03:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 20:03:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:03:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:03:20,492 INFO L225 Difference]: With dead ends: 8320 [2021-02-19 20:03:20,492 INFO L226 Difference]: Without dead ends: 8131 [2021-02-19 20:03:20,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 20:03:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8131 states. [2021-02-19 20:03:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8131 to 6247. [2021-02-19 20:03:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 2.9639769452449567) internal successors, (18513), 6246 states have internal predecessors, (18513), 0 states have call successors, (0), 0 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 20:03:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 18513 transitions. [2021-02-19 20:03:20,571 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 18513 transitions. Word has length 37 [2021-02-19 20:03:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:03:20,571 INFO L480 AbstractCegarLoop]: Abstraction has 6247 states and 18513 transitions. [2021-02-19 20:03:20,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:03:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 18513 transitions. [2021-02-19 20:03:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:03:20,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:03:20,577 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:03:20,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:20,778 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:03:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:03:20,778 INFO L82 PathProgramCache]: Analyzing trace with hash 237669952, now seen corresponding path program 64 times [2021-02-19 20:03:20,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:03:20,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296137561] [2021-02-19 20:03:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:03:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:21,074 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-02-19 20:03:21,240 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 20:03:21,426 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:03:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:22,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296137561] [2021-02-19 20:03:22,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398788328] [2021-02-19 20:03:22,597 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 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 20:03:22,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:03:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:03:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:03:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:23,712 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:03:23,713 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 31 treesize of output 15 [2021-02-19 20:03:23,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:23,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:23,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:23,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-02-19 20:03:24,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:24,658 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 17 [2021-02-19 20:03:24,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:24,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:24,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:24,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-02-19 20:03:25,528 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-02-19 20:03:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:25,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:25,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-02-19 20:03:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896464198] [2021-02-19 20:03:25,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:03:25,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:03:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:03:25,799 INFO L87 Difference]: Start difference. First operand 6247 states and 18513 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:03:27,093 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 20:03:27,279 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 20:03:27,637 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:03:28,181 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-02-19 20:03:28,442 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 20:03:29,288 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 20:03:29,958 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 20:03:31,200 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-02-19 20:03:31,567 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-02-19 20:03:31,891 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-02-19 20:03:32,211 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-02-19 20:03:32,675 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 20:03:33,156 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-02-19 20:03:33,622 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 20:03:34,861 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-02-19 20:03:35,303 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 20:03:36,801 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 20:03:37,678 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 20:03:38,193 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 20:03:40,050 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:03:40,674 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 20:03:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:03:41,785 INFO L93 Difference]: Finished difference Result 10170 states and 29609 transitions. [2021-02-19 20:03:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 20:03:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:03:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:03:41,806 INFO L225 Difference]: With dead ends: 10170 [2021-02-19 20:03:41,807 INFO L226 Difference]: Without dead ends: 10052 [2021-02-19 20:03:41,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=465, Invalid=4791, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 20:03:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10052 states. [2021-02-19 20:03:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10052 to 6268. [2021-02-19 20:03:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6268 states, 6267 states have (on average 2.962023296633158) internal successors, (18563), 6267 states have internal predecessors, (18563), 0 states have call successors, (0), 0 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 20:03:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 18563 transitions. [2021-02-19 20:03:41,895 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 18563 transitions. Word has length 37 [2021-02-19 20:03:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:03:41,895 INFO L480 AbstractCegarLoop]: Abstraction has 6268 states and 18563 transitions. [2021-02-19 20:03:41,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:03:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 18563 transitions. [2021-02-19 20:03:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:03:41,901 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:03:41,901 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:03:42,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 20:03:42,102 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:03:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:03:42,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1933976192, now seen corresponding path program 65 times [2021-02-19 20:03:42,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:03:42,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595738250] [2021-02-19 20:03:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:03:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:42,395 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-02-19 20:03:42,562 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 20:03:42,770 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:03:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:44,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595738250] [2021-02-19 20:03:44,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971981871] [2021-02-19 20:03:44,114 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 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 20:03:44,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:03:44,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:03:44,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:03:44,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:03:45,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:03:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 20:03:45,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:45,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:45,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:45,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-02-19 20:03:46,176 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:46,176 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 31 treesize of output 19 [2021-02-19 20:03:46,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:46,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:46,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:46,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-02-19 20:03:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:47,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:47,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-02-19 20:03:47,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885599414] [2021-02-19 20:03:47,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:03:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:03:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:03:47,220 INFO L87 Difference]: Start difference. First operand 6268 states and 18563 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:03:49,997 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 20:03:50,255 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 20:03:50,815 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 20:03:51,248 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 20:03:52,125 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 20:03:52,851 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 20:03:53,864 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 20:03:55,016 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-02-19 20:03:55,469 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-02-19 20:03:55,857 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 20:04:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:04:01,454 INFO L93 Difference]: Finished difference Result 9803 states and 28862 transitions. [2021-02-19 20:04:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:04:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:04:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:04:01,477 INFO L225 Difference]: With dead ends: 9803 [2021-02-19 20:04:01,477 INFO L226 Difference]: Without dead ends: 9598 [2021-02-19 20:04:01,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=297, Invalid=3735, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 20:04:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9598 states. [2021-02-19 20:04:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9598 to 6232. [2021-02-19 20:04:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 2.966939496068047) internal successors, (18487), 6231 states have internal predecessors, (18487), 0 states have call successors, (0), 0 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 20:04:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 18487 transitions. [2021-02-19 20:04:01,566 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 18487 transitions. Word has length 37 [2021-02-19 20:04:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:04:01,566 INFO L480 AbstractCegarLoop]: Abstraction has 6232 states and 18487 transitions. [2021-02-19 20:04:01,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 20:04:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 18487 transitions. [2021-02-19 20:04:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:04:01,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:04:01,572 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:04:01,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:04:01,773 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:04:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:04:01,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1219703318, now seen corresponding path program 66 times [2021-02-19 20:04:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:04:01,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697539976] [2021-02-19 20:04:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:04:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:04:02,140 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-02-19 20:04:02,323 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 20:04:02,529 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 20:04:02,751 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 Received shutdown request... [2021-02-19 20:04:03,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-02-19 20:04:03,036 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:04:03,059 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:04:03,059 INFO L202 PluginConnector]: Adding new model horseshoe-2jV.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:04:03 BasicIcfg [2021-02-19 20:04:03,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:04:03,059 INFO L168 Benchmark]: Toolchain (without parser) took 525147.49 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 845.2 MB). Free memory was 236.5 MB in the beginning and 547.6 MB in the end (delta: -311.0 MB). Peak memory consumption was 534.6 MB. Max. memory is 16.0 GB. [2021-02-19 20:04:03,060 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.31 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:04:03,060 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:04:03,060 INFO L168 Benchmark]: Boogie Preprocessor took 22.72 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:04:03,060 INFO L168 Benchmark]: RCFGBuilder took 279.49 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 234.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-02-19 20:04:03,060 INFO L168 Benchmark]: TraceAbstraction took 524810.11 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 845.2 MB). Free memory was 234.0 MB in the beginning and 547.6 MB in the end (delta: -313.6 MB). Peak memory consumption was 531.4 MB. Max. memory is 16.0 GB. [2021-02-19 20:04:03,060 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.31 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.72 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 279.49 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 234.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 524810.11 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 845.2 MB). Free memory was 234.0 MB in the beginning and 547.6 MB in the end (delta: -313.6 MB). Peak memory consumption was 531.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 10 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 524.6s, OverallIterations: 73, TraceHistogramMax: 2, AutomataDifference: 366.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12006 SDtfs, 37192 SDslu, 268100 SDs, 0 SdLazy, 188401 SolverSat, 4883 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5607 GetRequests, 1440 SyntacticMatches, 14 SemanticMatches, 4153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56527 ImplicationChecksByTransitivity, 264.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6304occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.7s AutomataMinimizationTime, 72 MinimizatonAttempts, 141722 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 133.1s InterpolantComputationTime, 5064 NumberOfCodeBlocks, 5064 NumberOfCodeBlocksAsserted, 253 NumberOfCheckSat, 4923 ConstructedInterpolants, 36 QuantifiedInterpolants, 3957012 SizeOfPredicates, 740 NumberOfNonLiveVariables, 6913 ConjunctsInSsa, 2800 ConjunctsInUnsatCore, 141 InterpolantComputations, 5 PerfectInterpolantSequences, 39/1829 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown