/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-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:32:59,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:32:59,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:32:59,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:32:59,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:32:59,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:32:59,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:32:59,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:32:59,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:32:59,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:32:59,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:32:59,554 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:32:59,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:32:59,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:32:59,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:32:59,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:32:59,556 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:32:59,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:32:59,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:32:59,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:32:59,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:32:59,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:32:59,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:32:59,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:32:59,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:32:59,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:32:59,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:32:59,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:32:59,558 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:32:59,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:32:59,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:32:59,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:32:59,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:32:59,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:32:59,898 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:32:59,899 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:32:59,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2021-06-05 23:32:59,900 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2021-06-05 23:32:59,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:32:59,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:32:59,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:32:59,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:32:59,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:32:59,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:32:59,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:32:59,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:32:59,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:32:59,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:32:59,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:32:59,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:32:59,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:32:59,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:32:59,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:33:00,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:33:00,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:33:00,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... [2021-06-05 23:33:00,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:33:00,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:33:00,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:33:00,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:33:00,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:33:00,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:33:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:33:00,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:33:00,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:33:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:33:00,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:33:00,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:33:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:33:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:33:00,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:33:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:33:00,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:33:00,073 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:33:00,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:33:00,402 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:33:00,405 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:33:00 BoogieIcfgContainer [2021-06-05 23:33:00,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:33:00,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:33:00,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:33:00,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:33:00,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:32:59" (1/2) ... [2021-06-05 23:33:00,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab3bfea and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:33:00, skipping insertion in model container [2021-06-05 23:33:00,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:33:00" (2/2) ... [2021-06-05 23:33:00,421 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2021-06-05 23:33:00,426 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:33:00,426 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:33:00,426 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:33:00,426 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:33:00,455 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:33:00,472 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:33:00,487 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:33:00,487 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:33:00,487 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:33:00,487 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:33:00,488 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:33:00,488 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:33:00,488 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:33:00,488 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:33:00,495 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 23:33:00,529 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:33:00,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:00,543 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:00,543 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1495535584, now seen corresponding path program 1 times [2021-06-05 23:33:00,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:00,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366671783] [2021-06-05 23:33:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:00,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:00,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366671783] [2021-06-05 23:33:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366671783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:33:00,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:33:00,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:33:00,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141153278] [2021-06-05 23:33:00,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:33:00,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:33:00,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:00,689 INFO L87 Difference]: Start difference. First operand has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:00,731 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2021-06-05 23:33:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:33:00,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:33:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:00,755 INFO L225 Difference]: With dead ends: 393 [2021-06-05 23:33:00,755 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 23:33:00,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 23:33:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2021-06-05 23:33:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2021-06-05 23:33:00,841 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2021-06-05 23:33:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:00,841 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2021-06-05 23:33:00,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2021-06-05 23:33:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:33:00,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:00,849 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:00,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:33:00,850 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1760185073, now seen corresponding path program 1 times [2021-06-05 23:33:00,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:00,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429537429] [2021-06-05 23:33:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:00,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:00,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429537429] [2021-06-05 23:33:00,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429537429] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:33:00,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:33:00,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:33:00,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066348524] [2021-06-05 23:33:00,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:33:00,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:00,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:33:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:00,912 INFO L87 Difference]: Start difference. First operand 393 states and 1157 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) [2021-06-05 23:33:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:00,937 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2021-06-05 23:33:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:33:00,939 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 [2021-06-05 23:33:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:00,943 INFO L225 Difference]: With dead ends: 442 [2021-06-05 23:33:00,943 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 23:33:00,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 23:33:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-06-05 23:33:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2021-06-05 23:33:00,969 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2021-06-05 23:33:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:00,969 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2021-06-05 23:33:00,969 INFO L483 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) [2021-06-05 23:33:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2021-06-05 23:33:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:33:00,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:00,971 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:00,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:33:00,972 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 992917241, now seen corresponding path program 1 times [2021-06-05 23:33:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:00,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406711461] [2021-06-05 23:33:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:33:01,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:01,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406711461] [2021-06-05 23:33:01,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406711461] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:33:01,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:33:01,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:33:01,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101035850] [2021-06-05 23:33:01,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:33:01,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:33:01,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:01,064 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:01,081 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2021-06-05 23:33:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:33:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:33:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:01,086 INFO L225 Difference]: With dead ends: 880 [2021-06-05 23:33:01,088 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 23:33:01,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 23:33:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2021-06-05 23:33:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2021-06-05 23:33:01,113 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2021-06-05 23:33:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:01,113 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2021-06-05 23:33:01,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2021-06-05 23:33:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:33:01,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:01,116 INFO L554 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] [2021-06-05 23:33:01,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:33:01,117 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:01,118 INFO L82 PathProgramCache]: Analyzing trace with hash -92913957, now seen corresponding path program 1 times [2021-06-05 23:33:01,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:01,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482051945] [2021-06-05 23:33:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:33:01,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:01,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482051945] [2021-06-05 23:33:01,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482051945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:01,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102100632] [2021-06-05 23:33:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:33:01,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:33:01,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102100632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:01,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:01,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-06-05 23:33:01,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074411063] [2021-06-05 23:33:01,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:33:01,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:01,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:33:01,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:33:01,506 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:01,673 INFO L93 Difference]: Finished difference Result 1639 states and 4869 transitions. [2021-06-05 23:33:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:33:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:33:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:01,679 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 23:33:01,679 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 23:33:01,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:33:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 23:33:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 843. [2021-06-05 23:33:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.9631828978622328) internal successors, (2495), 842 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2495 transitions. [2021-06-05 23:33:01,703 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2495 transitions. Word has length 28 [2021-06-05 23:33:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:01,704 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2495 transitions. [2021-06-05 23:33:01,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2495 transitions. [2021-06-05 23:33:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:33:01,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:01,706 INFO L554 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] [2021-06-05 23:33:01,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:01,913 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash -121778885, now seen corresponding path program 2 times [2021-06-05 23:33:01,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:01,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462715530] [2021-06-05 23:33:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:01,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:01,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462715530] [2021-06-05 23:33:01,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462715530] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:33:01,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:33:01,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:33:01,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381108162] [2021-06-05 23:33:01,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:33:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:33:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:01,937 INFO L87 Difference]: Start difference. First operand 843 states and 2495 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:01,944 INFO L93 Difference]: Finished difference Result 713 states and 2082 transitions. [2021-06-05 23:33:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:33:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:33:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:01,948 INFO L225 Difference]: With dead ends: 713 [2021-06-05 23:33:01,948 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 23:33:01,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:33:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 23:33:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-06-05 23:33:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.9241573033707864) internal successors, (2082), 712 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2082 transitions. [2021-06-05 23:33:01,966 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2082 transitions. Word has length 28 [2021-06-05 23:33:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:01,966 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2082 transitions. [2021-06-05 23:33:01,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2082 transitions. [2021-06-05 23:33:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:33:01,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:01,968 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:01,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:33:01,968 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash -643643710, now seen corresponding path program 3 times [2021-06-05 23:33:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139862471] [2021-06-05 23:33:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:33:02,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:02,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139862471] [2021-06-05 23:33:02,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139862471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:02,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139403557] [2021-06-05 23:33:02,071 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 [2021-06-05 23:33:02,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:33:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:33:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:33:02,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139403557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:02,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:02,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 23:33:02,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322639187] [2021-06-05 23:33:02,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:33:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:33:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:33:02,342 INFO L87 Difference]: Start difference. First operand 713 states and 2082 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:03,202 INFO L93 Difference]: Finished difference Result 2300 states and 6794 transitions. [2021-06-05 23:33:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:33:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:33:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:03,212 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 23:33:03,212 INFO L226 Difference]: Without dead ends: 1648 [2021-06-05 23:33:03,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:33:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-06-05 23:33:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1168. [2021-06-05 23:33:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.942587832047986) internal successors, (3434), 1167 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3434 transitions. [2021-06-05 23:33:03,242 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3434 transitions. Word has length 35 [2021-06-05 23:33:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:03,242 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3434 transitions. [2021-06-05 23:33:03,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3434 transitions. [2021-06-05 23:33:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 23:33:03,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:03,246 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-06-05 23:33:03,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:03,469 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash 407150600, now seen corresponding path program 4 times [2021-06-05 23:33:03,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:03,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580561883] [2021-06-05 23:33:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:33:03,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580561883] [2021-06-05 23:33:03,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580561883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674270003] [2021-06-05 23:33:03,523 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:03,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:33:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:33:03,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:03,633 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 7 treesize of output 3 [2021-06-05 23:33:03,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:03,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:03,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:03,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 23:33:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:33:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674270003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:03,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:03,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 23:33:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126139403] [2021-06-05 23:33:03,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:33:03,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:33:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:33:03,682 INFO L87 Difference]: Start difference. First operand 1168 states and 3434 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:03,714 INFO L93 Difference]: Finished difference Result 2636 states and 7723 transitions. [2021-06-05 23:33:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:33:03,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 23:33:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:03,727 INFO L225 Difference]: With dead ends: 2636 [2021-06-05 23:33:03,727 INFO L226 Difference]: Without dead ends: 2595 [2021-06-05 23:33:03,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:33:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-06-05 23:33:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2203. [2021-06-05 23:33:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 3.022706630336058) internal successors, (6656), 2202 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6656 transitions. [2021-06-05 23:33:03,849 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6656 transitions. Word has length 40 [2021-06-05 23:33:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:03,849 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6656 transitions. [2021-06-05 23:33:03,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6656 transitions. [2021-06-05 23:33:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 23:33:03,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:03,856 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-06-05 23:33:04,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:04,056 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1457932716, now seen corresponding path program 5 times [2021-06-05 23:33:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:04,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279998267] [2021-06-05 23:33:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:33:04,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:04,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279998267] [2021-06-05 23:33:04,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279998267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:04,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727837490] [2021-06-05 23:33:04,151 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:04,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:33:04,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:33:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:04,341 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 7 treesize of output 3 [2021-06-05 23:33:04,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:04,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:04,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:33:04,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 23:33:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:33:04,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727837490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:04,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:04,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 23:33:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621854234] [2021-06-05 23:33:04,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:33:04,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:33:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:33:04,412 INFO L87 Difference]: Start difference. First operand 2203 states and 6656 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:04,670 INFO L93 Difference]: Finished difference Result 4689 states and 14236 transitions. [2021-06-05 23:33:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:33:04,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 23:33:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:04,685 INFO L225 Difference]: With dead ends: 4689 [2021-06-05 23:33:04,685 INFO L226 Difference]: Without dead ends: 2889 [2021-06-05 23:33:04,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:33:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-06-05 23:33:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2233. [2021-06-05 23:33:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2021-06-05 23:33:04,746 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 40 [2021-06-05 23:33:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:04,747 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2021-06-05 23:33:04,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2021-06-05 23:33:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:33:04,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:04,752 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-06-05 23:33:04,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:04,966 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash -337432434, now seen corresponding path program 6 times [2021-06-05 23:33:04,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:04,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658500323] [2021-06-05 23:33:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:05,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658500323] [2021-06-05 23:33:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658500323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816646858] [2021-06-05 23:33:05,190 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:05,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:33:05,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:05,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:33:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:05,492 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_1], 1=[v_prenex_3]} [2021-06-05 23:33:05,496 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 5 treesize of output 3 [2021-06-05 23:33:05,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:05,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:05,534 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 7 treesize of output 3 [2021-06-05 23:33:05,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:05,579 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 23:33:05,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:33:05,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:05,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:05,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:05,621 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:105, output treesize:63 [2021-06-05 23:33:05,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:05,719 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 18 treesize of output 10 [2021-06-05 23:33:05,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:05,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:05,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:05,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-05 23:33:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:33:05,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816646858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:05,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:05,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-06-05 23:33:05,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055442830] [2021-06-05 23:33:05,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:33:05,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:05,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:33:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:33:05,773 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:13,004 INFO L93 Difference]: Finished difference Result 11042 states and 32715 transitions. [2021-06-05 23:33:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-05 23:33:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:33:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:13,054 INFO L225 Difference]: With dead ends: 11042 [2021-06-05 23:33:13,054 INFO L226 Difference]: Without dead ends: 9556 [2021-06-05 23:33:13,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 5941.7ms TimeCoverageRelationStatistics Valid=3926, Invalid=22806, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 23:33:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-06-05 23:33:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 3753. [2021-06-05 23:33:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.0285181236673773) internal successors, (11363), 3752 states have internal predecessors, (11363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 11363 transitions. [2021-06-05 23:33:13,212 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 11363 transitions. Word has length 42 [2021-06-05 23:33:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:13,213 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 11363 transitions. [2021-06-05 23:33:13,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 11363 transitions. [2021-06-05 23:33:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:33:13,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:13,222 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-06-05 23:33:13,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 23:33:13,445 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1703826358, now seen corresponding path program 7 times [2021-06-05 23:33:13,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:13,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498431909] [2021-06-05 23:33:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:13,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498431909] [2021-06-05 23:33:13,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498431909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:13,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749655647] [2021-06-05 23:33:13,660 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:13,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:33:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:13,808 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 17 treesize of output 13 [2021-06-05 23:33:13,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:13,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:13,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:13,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-05 23:33:14,021 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_9, q3, v_prenex_12, v_prenex_5], 1=[q1, v_prenex_6], 3=[v_prenex_11]} [2021-06-05 23:33:14,026 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 17 treesize of output 9 [2021-06-05 23:33:14,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:14,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:33:14,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:14,124 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 7 treesize of output 5 [2021-06-05 23:33:14,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:14,165 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 17 treesize of output 9 [2021-06-05 23:33:14,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:14,205 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:33:14,205 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 24 treesize of output 12 [2021-06-05 23:33:14,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:14,273 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:14,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:33:14,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 23:33:14,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:14,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 23:33:14,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:14,363 INFO L628 ElimStorePlain]: treesize reduction 15, result has 74.1 percent of original size [2021-06-05 23:33:14,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 7 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:14,365 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 14 variables, input treesize:179, output treesize:43 [2021-06-05 23:33:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:14,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749655647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:14,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:14,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 23:33:14,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641886121] [2021-06-05 23:33:14,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:33:14,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:33:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:33:14,533 INFO L87 Difference]: Start difference. First operand 3753 states and 11363 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:16,450 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 23:33:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:17,163 INFO L93 Difference]: Finished difference Result 11827 states and 35204 transitions. [2021-06-05 23:33:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:33:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:33:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:17,191 INFO L225 Difference]: With dead ends: 11827 [2021-06-05 23:33:17,191 INFO L226 Difference]: Without dead ends: 10164 [2021-06-05 23:33:17,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2243.6ms TimeCoverageRelationStatistics Valid=728, Invalid=3694, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:33:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10164 states. [2021-06-05 23:33:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10164 to 3828. [2021-06-05 23:33:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.02874314084139) internal successors, (11591), 3827 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11591 transitions. [2021-06-05 23:33:17,368 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11591 transitions. Word has length 42 [2021-06-05 23:33:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:17,368 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11591 transitions. [2021-06-05 23:33:17,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11591 transitions. [2021-06-05 23:33:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:33:17,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:17,376 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-06-05 23:33:17,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:17,599 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1100727138, now seen corresponding path program 8 times [2021-06-05 23:33:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:17,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152986216] [2021-06-05 23:33:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:17,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:17,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152986216] [2021-06-05 23:33:17,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152986216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:17,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025000155] [2021-06-05 23:33:17,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:17,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:33:17,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:33:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:18,056 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_18], 1=[v_prenex_16]} [2021-06-05 23:33:18,059 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 5 treesize of output 3 [2021-06-05 23:33:18,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,096 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 7 treesize of output 3 [2021-06-05 23:33:18,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,149 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 23:33:18,154 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:18,154 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 11 treesize of output 5 [2021-06-05 23:33:18,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:18,178 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:105, output treesize:63 [2021-06-05 23:33:18,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-05 23:33:18,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:18,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:18,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:18,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:33:18,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,240 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:18,240 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 13 treesize of output 7 [2021-06-05 23:33:18,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:18,255 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:31 [2021-06-05 23:33:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:18,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025000155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:18,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:18,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-06-05 23:33:18,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575409944] [2021-06-05 23:33:18,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:33:18,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:33:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:33:18,402 INFO L87 Difference]: Start difference. First operand 3828 states and 11591 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:28,032 INFO L93 Difference]: Finished difference Result 14066 states and 41923 transitions. [2021-06-05 23:33:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-06-05 23:33:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:33:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:28,068 INFO L225 Difference]: With dead ends: 14066 [2021-06-05 23:33:28,068 INFO L226 Difference]: Without dead ends: 12367 [2021-06-05 23:33:28,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13054 ImplicationChecksByTransitivity, 8606.6ms TimeCoverageRelationStatistics Valid=4398, Invalid=26402, Unknown=0, NotChecked=0, Total=30800 [2021-06-05 23:33:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12367 states. [2021-06-05 23:33:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12367 to 3970. [2021-06-05 23:33:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 3.0330057949105567) internal successors, (12038), 3969 states have internal predecessors, (12038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 12038 transitions. [2021-06-05 23:33:28,224 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 12038 transitions. Word has length 42 [2021-06-05 23:33:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:28,224 INFO L482 AbstractCegarLoop]: Abstraction has 3970 states and 12038 transitions. [2021-06-05 23:33:28,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 12038 transitions. [2021-06-05 23:33:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:33:28,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:28,233 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-06-05 23:33:28,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:28,449 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1161843202, now seen corresponding path program 9 times [2021-06-05 23:33:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:28,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313994895] [2021-06-05 23:33:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:28,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313994895] [2021-06-05 23:33:28,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313994895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035460993] [2021-06-05 23:33:28,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:28,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:33:28,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:33:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:28,910 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_19], 1=[v_prenex_21]} [2021-06-05 23:33:28,914 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 5 treesize of output 3 [2021-06-05 23:33:28,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:28,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:28,951 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 7 treesize of output 3 [2021-06-05 23:33:28,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,001 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.0 percent of original size [2021-06-05 23:33:29,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:29,006 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 11 treesize of output 5 [2021-06-05 23:33:29,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:29,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:29,029 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:117, output treesize:72 [2021-06-05 23:33:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-05 23:33:29,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:33:29,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,098 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:29,099 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 13 treesize of output 7 [2021-06-05 23:33:29,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:29,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:29,116 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:87, output treesize:40 [2021-06-05 23:33:29,398 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 5 treesize of output 3 [2021-06-05 23:33:29,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:29,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:29,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:33:29,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:29,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:33:29,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:29,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:29,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:33:29,434 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:31 [2021-06-05 23:33:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:29,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035460993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:29,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:29,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 23:33:29,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613449661] [2021-06-05 23:33:29,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:33:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:29,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:33:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:33:29,528 INFO L87 Difference]: Start difference. First operand 3970 states and 12038 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:38,377 INFO L93 Difference]: Finished difference Result 11155 states and 33205 transitions. [2021-06-05 23:33:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 23:33:38,377 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:33:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:38,394 INFO L225 Difference]: With dead ends: 11155 [2021-06-05 23:33:38,394 INFO L226 Difference]: Without dead ends: 8967 [2021-06-05 23:33:38,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9529 ImplicationChecksByTransitivity, 7814.1ms TimeCoverageRelationStatistics Valid=3798, Invalid=21008, Unknown=0, NotChecked=0, Total=24806 [2021-06-05 23:33:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2021-06-05 23:33:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 3852. [2021-06-05 23:33:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 2.9968839262529214) internal successors, (11541), 3851 states have internal predecessors, (11541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 11541 transitions. [2021-06-05 23:33:38,502 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 11541 transitions. Word has length 42 [2021-06-05 23:33:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:38,502 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 11541 transitions. [2021-06-05 23:33:38,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 11541 transitions. [2021-06-05 23:33:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:33:38,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:38,510 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 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] [2021-06-05 23:33:38,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:33:38,733 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash 610965756, now seen corresponding path program 10 times [2021-06-05 23:33:38,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:38,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249525965] [2021-06-05 23:33:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:38,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:38,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249525965] [2021-06-05 23:33:38,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249525965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:38,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47054802] [2021-06-05 23:33:38,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:38,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:33:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:38,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:33:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:39,047 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:39,048 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 18 treesize of output 10 [2021-06-05 23:33:39,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:39,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:39,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:39,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-05 23:33:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:33:39,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47054802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:39,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:39,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 22 [2021-06-05 23:33:39,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365873163] [2021-06-05 23:33:39,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:33:39,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:39,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:33:39,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:33:39,107 INFO L87 Difference]: Start difference. First operand 3852 states and 11541 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:42,801 INFO L93 Difference]: Finished difference Result 14466 states and 42669 transitions. [2021-06-05 23:33:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-05 23:33:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:33:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:42,821 INFO L225 Difference]: With dead ends: 14466 [2021-06-05 23:33:42,821 INFO L226 Difference]: Without dead ends: 14073 [2021-06-05 23:33:42,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9648 ImplicationChecksByTransitivity, 2923.8ms TimeCoverageRelationStatistics Valid=2981, Invalid=20581, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 23:33:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2021-06-05 23:33:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 4774. [2021-06-05 23:33:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4774 states, 4773 states have (on average 2.9882673371045465) internal successors, (14263), 4773 states have internal predecessors, (14263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 14263 transitions. [2021-06-05 23:33:42,969 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 14263 transitions. Word has length 44 [2021-06-05 23:33:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:42,969 INFO L482 AbstractCegarLoop]: Abstraction has 4774 states and 14263 transitions. [2021-06-05 23:33:42,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 14263 transitions. [2021-06-05 23:33:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:33:42,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:42,977 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 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] [2021-06-05 23:33:43,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:33:43,199 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:43,200 INFO L82 PathProgramCache]: Analyzing trace with hash 893511408, now seen corresponding path program 11 times [2021-06-05 23:33:43,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:43,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222572234] [2021-06-05 23:33:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:43,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:43,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222572234] [2021-06-05 23:33:43,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222572234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:43,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441981761] [2021-06-05 23:33:43,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:43,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:33:43,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:33:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:43,626 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:43,627 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 18 treesize of output 10 [2021-06-05 23:33:43,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:43,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:43,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-05 23:33:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:33:43,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441981761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:43,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:43,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-06-05 23:33:43,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536651557] [2021-06-05 23:33:43,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:33:43,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:33:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:33:43,674 INFO L87 Difference]: Start difference. First operand 4774 states and 14263 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:49,580 INFO L93 Difference]: Finished difference Result 18190 states and 53987 transitions. [2021-06-05 23:33:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 23:33:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:33:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:49,598 INFO L225 Difference]: With dead ends: 18190 [2021-06-05 23:33:49,598 INFO L226 Difference]: Without dead ends: 15389 [2021-06-05 23:33:49,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13726 ImplicationChecksByTransitivity, 4810.2ms TimeCoverageRelationStatistics Valid=4181, Invalid=28039, Unknown=0, NotChecked=0, Total=32220 [2021-06-05 23:33:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15389 states. [2021-06-05 23:33:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15389 to 5222. [2021-06-05 23:33:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 2.981421183681287) internal successors, (15566), 5221 states have internal predecessors, (15566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 15566 transitions. [2021-06-05 23:33:49,747 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 15566 transitions. Word has length 44 [2021-06-05 23:33:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:49,747 INFO L482 AbstractCegarLoop]: Abstraction has 5222 states and 15566 transitions. [2021-06-05 23:33:49,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 15566 transitions. [2021-06-05 23:33:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:33:49,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:49,757 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:49,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:33:49,969 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1369693409, now seen corresponding path program 12 times [2021-06-05 23:33:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:49,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828811761] [2021-06-05 23:33:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:33:50,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:50,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828811761] [2021-06-05 23:33:50,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828811761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:50,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918433391] [2021-06-05 23:33:50,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:50,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:33:50,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:33:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:50,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:50,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 23:33:50,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:50,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:50,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:50,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 23:33:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:33:50,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918433391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:50,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:50,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-06-05 23:33:50,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137292241] [2021-06-05 23:33:50,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:33:50,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:50,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:33:50,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:33:50,150 INFO L87 Difference]: Start difference. First operand 5222 states and 15566 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:50,216 INFO L93 Difference]: Finished difference Result 10571 states and 31484 transitions. [2021-06-05 23:33:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:33:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 49 [2021-06-05 23:33:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:50,231 INFO L225 Difference]: With dead ends: 10571 [2021-06-05 23:33:50,231 INFO L226 Difference]: Without dead ends: 10541 [2021-06-05 23:33:50,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:33:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10541 states. [2021-06-05 23:33:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10541 to 8733. [2021-06-05 23:33:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 8732 states have (on average 3.02370590929913) internal successors, (26403), 8732 states have internal predecessors, (26403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 26403 transitions. [2021-06-05 23:33:50,406 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 26403 transitions. Word has length 49 [2021-06-05 23:33:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 8733 states and 26403 transitions. [2021-06-05 23:33:50,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 26403 transitions. [2021-06-05 23:33:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:33:50,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:50,423 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:50,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 23:33:50,641 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2045512635, now seen corresponding path program 13 times [2021-06-05 23:33:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:50,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014146331] [2021-06-05 23:33:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:50,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:50,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014146331] [2021-06-05 23:33:50,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014146331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:50,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226188963] [2021-06-05 23:33:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:33:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:51,000 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:33:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:33:51,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:51,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:51,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:51,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 23:33:51,099 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 [2021-06-05 23:33:51,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:51,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:51,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:51,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:33:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:33:51,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226188963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:51,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:51,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-05 23:33:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435836751] [2021-06-05 23:33:51,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:33:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:33:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:33:51,142 INFO L87 Difference]: Start difference. First operand 8733 states and 26403 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:53,052 INFO L93 Difference]: Finished difference Result 23995 states and 72339 transitions. [2021-06-05 23:33:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:33:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:33:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:53,082 INFO L225 Difference]: With dead ends: 23995 [2021-06-05 23:33:53,082 INFO L226 Difference]: Without dead ends: 22434 [2021-06-05 23:33:53,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1435.5ms TimeCoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:33:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22434 states. [2021-06-05 23:33:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22434 to 12965. [2021-06-05 23:33:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.03139463128664) internal successors, (39299), 12964 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 39299 transitions. [2021-06-05 23:33:53,444 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 39299 transitions. Word has length 49 [2021-06-05 23:33:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:53,444 INFO L482 AbstractCegarLoop]: Abstraction has 12965 states and 39299 transitions. [2021-06-05 23:33:53,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 39299 transitions. [2021-06-05 23:33:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:33:53,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:53,469 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:53,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:53,693 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1639678941, now seen corresponding path program 14 times [2021-06-05 23:33:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:53,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303645003] [2021-06-05 23:33:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:53,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:53,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303645003] [2021-06-05 23:33:53,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303645003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:53,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74355424] [2021-06-05 23:33:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:53,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:33:53,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:33:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:53,920 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:33:53,920 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 18 treesize of output 10 [2021-06-05 23:33:53,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:53,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:53,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:53,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-05 23:33:53,983 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 [2021-06-05 23:33:53,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:53,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:53,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:53,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:33:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:33:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74355424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:33:54,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68049898] [2021-06-05 23:33:54,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:33:54,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:33:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:33:54,017 INFO L87 Difference]: Start difference. First operand 12965 states and 39299 transitions. Second operand has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:57,493 INFO L93 Difference]: Finished difference Result 29303 states and 86448 transitions. [2021-06-05 23:33:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 23:33:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:33:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:57,527 INFO L225 Difference]: With dead ends: 29303 [2021-06-05 23:33:57,527 INFO L226 Difference]: Without dead ends: 26445 [2021-06-05 23:33:57,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7651 ImplicationChecksByTransitivity, 2352.4ms TimeCoverageRelationStatistics Valid=2807, Invalid=15825, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 23:33:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26445 states. [2021-06-05 23:33:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26445 to 13262. [2021-06-05 23:33:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 3.0076163185280147) internal successors, (39884), 13261 states have internal predecessors, (39884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 39884 transitions. [2021-06-05 23:33:57,816 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 39884 transitions. Word has length 49 [2021-06-05 23:33:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:57,816 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 39884 transitions. [2021-06-05 23:33:57,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 39884 transitions. [2021-06-05 23:33:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:33:57,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:57,841 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:33:58,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:33:58,064 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1094414023, now seen corresponding path program 15 times [2021-06-05 23:33:58,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:58,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68872589] [2021-06-05 23:33:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:58,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68872589] [2021-06-05 23:33:58,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68872589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713014496] [2021-06-05 23:33:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:58,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:33:58,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:33:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:58,399 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:33:58,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:33:58,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:58,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:58,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:58,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 23:33:58,491 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 [2021-06-05 23:33:58,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:58,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:58,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:58,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 23:33:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:58,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713014496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:58,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:58,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-06-05 23:33:58,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756589053] [2021-06-05 23:33:58,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:33:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:33:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:33:58,558 INFO L87 Difference]: Start difference. First operand 13262 states and 39884 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:05,206 INFO L93 Difference]: Finished difference Result 35518 states and 106381 transitions. [2021-06-05 23:34:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 23:34:05,206 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:34:05,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:05,252 INFO L225 Difference]: With dead ends: 35518 [2021-06-05 23:34:05,252 INFO L226 Difference]: Without dead ends: 33568 [2021-06-05 23:34:05,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13705 ImplicationChecksByTransitivity, 4989.8ms TimeCoverageRelationStatistics Valid=4855, Invalid=29555, Unknown=0, NotChecked=0, Total=34410 [2021-06-05 23:34:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33568 states. [2021-06-05 23:34:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33568 to 17682. [2021-06-05 23:34:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 3.0209264181890165) internal successors, (53413), 17681 states have internal predecessors, (53413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 53413 transitions. [2021-06-05 23:34:05,582 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 53413 transitions. Word has length 49 [2021-06-05 23:34:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:05,582 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 53413 transitions. [2021-06-05 23:34:05,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 53413 transitions. [2021-06-05 23:34:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:34:05,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:05,603 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:05,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:05,804 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash -857147075, now seen corresponding path program 16 times [2021-06-05 23:34:05,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:05,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268146053] [2021-06-05 23:34:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:06,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268146053] [2021-06-05 23:34:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268146053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397526651] [2021-06-05 23:34:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:06,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:34:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:06,215 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 21 treesize of output 13 [2021-06-05 23:34:06,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:06,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-06-05 23:34:06,490 INFO L446 ElimStorePlain]: Different costs {0=[q3], 1=[v_prenex_28], 3=[q1, v_prenex_27]} [2021-06-05 23:34:06,493 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 17 treesize of output 13 [2021-06-05 23:34:06,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:06,539 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 21 treesize of output 13 [2021-06-05 23:34:06,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,544 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:34:06,545 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 15 [2021-06-05 23:34:06,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:06,586 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:34:06,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 23:34:06,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:06,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 23:34:06,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,629 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:34:06,629 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 15 treesize of output 7 [2021-06-05 23:34:06,630 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:06,660 INFO L628 ElimStorePlain]: treesize reduction 12, result has 71.4 percent of original size [2021-06-05 23:34:06,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:34:06,661 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:146, output treesize:28 [2021-06-05 23:34:06,796 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 23:34:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:06,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397526651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:06,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:06,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 23:34:06,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301291973] [2021-06-05 23:34:06,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:34:06,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:34:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:34:06,825 INFO L87 Difference]: Start difference. First operand 17682 states and 53413 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:09,962 INFO L93 Difference]: Finished difference Result 32635 states and 97607 transitions. [2021-06-05 23:34:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:34:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:34:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:10,002 INFO L225 Difference]: With dead ends: 32635 [2021-06-05 23:34:10,003 INFO L226 Difference]: Without dead ends: 29107 [2021-06-05 23:34:10,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2543.7ms TimeCoverageRelationStatistics Valid=817, Invalid=6323, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:34:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29107 states. [2021-06-05 23:34:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29107 to 19560. [2021-06-05 23:34:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19560 states, 19559 states have (on average 3.0155427169078175) internal successors, (58981), 19559 states have internal predecessors, (58981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 58981 transitions. [2021-06-05 23:34:10,330 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 58981 transitions. Word has length 49 [2021-06-05 23:34:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:10,330 INFO L482 AbstractCegarLoop]: Abstraction has 19560 states and 58981 transitions. [2021-06-05 23:34:10,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 58981 transitions. [2021-06-05 23:34:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:34:10,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:10,354 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:10,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:34:10,567 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash 939243943, now seen corresponding path program 17 times [2021-06-05 23:34:10,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:10,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7107871] [2021-06-05 23:34:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:10,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:10,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7107871] [2021-06-05 23:34:10,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7107871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:10,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369180040] [2021-06-05 23:34:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:10,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:34:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:34:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:10,937 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:34:10,937 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 18 treesize of output 10 [2021-06-05 23:34:10,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:10,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:10,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:10,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-05 23:34:11,005 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 [2021-06-05 23:34:11,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:11,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:11,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:11,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:11,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369180040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:11,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:11,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-06-05 23:34:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660643501] [2021-06-05 23:34:11,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:34:11,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:34:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:34:11,075 INFO L87 Difference]: Start difference. First operand 19560 states and 58981 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:14,720 INFO L93 Difference]: Finished difference Result 49644 states and 149422 transitions. [2021-06-05 23:34:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 23:34:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:34:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:14,796 INFO L225 Difference]: With dead ends: 49644 [2021-06-05 23:34:14,796 INFO L226 Difference]: Without dead ends: 46702 [2021-06-05 23:34:14,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 2638.7ms TimeCoverageRelationStatistics Valid=2056, Invalid=10826, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:34:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46702 states. [2021-06-05 23:34:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46702 to 28803. [2021-06-05 23:34:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28803 states, 28802 states have (on average 3.0261440177765433) internal successors, (87159), 28802 states have internal predecessors, (87159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28803 states to 28803 states and 87159 transitions. [2021-06-05 23:34:15,369 INFO L78 Accepts]: Start accepts. Automaton has 28803 states and 87159 transitions. Word has length 49 [2021-06-05 23:34:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:15,369 INFO L482 AbstractCegarLoop]: Abstraction has 28803 states and 87159 transitions. [2021-06-05 23:34:15,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 28803 states and 87159 transitions. [2021-06-05 23:34:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:34:15,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:15,413 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:15,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:15,615 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1482469265, now seen corresponding path program 18 times [2021-06-05 23:34:15,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:15,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218486021] [2021-06-05 23:34:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:34:15,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:15,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218486021] [2021-06-05 23:34:15,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218486021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:15,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798181614] [2021-06-05 23:34:15,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:15,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:34:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:15,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:34:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:16,200 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 7 treesize of output 3 [2021-06-05 23:34:16,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,241 INFO L628 ElimStorePlain]: treesize reduction 34, result has 68.2 percent of original size [2021-06-05 23:34:16,241 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-05 23:34:16,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:34:16,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:114, output treesize:71 [2021-06-05 23:34:16,325 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:34:16,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:34:16,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:16,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-05 23:34:16,378 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 [2021-06-05 23:34:16,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:16,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:34:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798181614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:16,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:16,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-05 23:34:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375919402] [2021-06-05 23:34:16,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:34:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:34:16,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:34:16,424 INFO L87 Difference]: Start difference. First operand 28803 states and 87159 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:22,273 INFO L93 Difference]: Finished difference Result 62509 states and 189125 transitions. [2021-06-05 23:34:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:34:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:34:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:22,363 INFO L225 Difference]: With dead ends: 62509 [2021-06-05 23:34:22,363 INFO L226 Difference]: Without dead ends: 55884 [2021-06-05 23:34:22,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 4231.8ms TimeCoverageRelationStatistics Valid=2397, Invalid=13605, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 23:34:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55884 states. [2021-06-05 23:34:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55884 to 36502. [2021-06-05 23:34:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36502 states, 36501 states have (on average 3.0240541355031367) internal successors, (110381), 36501 states have internal predecessors, (110381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36502 states to 36502 states and 110381 transitions. [2021-06-05 23:34:23,306 INFO L78 Accepts]: Start accepts. Automaton has 36502 states and 110381 transitions. Word has length 49 [2021-06-05 23:34:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:23,306 INFO L482 AbstractCegarLoop]: Abstraction has 36502 states and 110381 transitions. [2021-06-05 23:34:23,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 36502 states and 110381 transitions. [2021-06-05 23:34:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:34:23,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:23,348 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:23,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 23:34:23,551 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -742740465, now seen corresponding path program 19 times [2021-06-05 23:34:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:23,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309764097] [2021-06-05 23:34:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309764097] [2021-06-05 23:34:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309764097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067321141] [2021-06-05 23:34:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:34:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:23,952 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 21 treesize of output 13 [2021-06-05 23:34:23,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:23,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:23,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:23,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:26 [2021-06-05 23:34:24,279 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_40], 1=[v_prenex_34, v_prenex_33], 3=[q1, v_prenex_39]} [2021-06-05 23:34:24,283 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 17 treesize of output 13 [2021-06-05 23:34:24,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:24,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:24,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 23:34:24,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:24,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:24,376 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:34:24,376 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 15 [2021-06-05 23:34:24,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:24,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:24,415 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:34:24,415 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 15 treesize of output 7 [2021-06-05 23:34:24,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:24,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:24,446 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:34:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 23:34:24,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:24,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:24,470 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:34:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 23:34:24,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:24,495 INFO L628 ElimStorePlain]: treesize reduction 12, result has 73.9 percent of original size [2021-06-05 23:34:24,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:34:24,496 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:150, output treesize:32 [2021-06-05 23:34:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:34:24,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067321141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:24,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:24,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-06-05 23:34:24,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888096777] [2021-06-05 23:34:24,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:34:24,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:24,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:34:24,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:34:24,554 INFO L87 Difference]: Start difference. First operand 36502 states and 110381 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:26,889 INFO L93 Difference]: Finished difference Result 48359 states and 145089 transitions. [2021-06-05 23:34:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:34:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:34:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:26,968 INFO L225 Difference]: With dead ends: 48359 [2021-06-05 23:34:26,968 INFO L226 Difference]: Without dead ends: 46710 [2021-06-05 23:34:26,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1880.9ms TimeCoverageRelationStatistics Valid=565, Invalid=3341, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:34:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46710 states. [2021-06-05 23:34:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46710 to 36654. [2021-06-05 23:34:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36654 states, 36653 states have (on average 3.0235178566556624) internal successors, (110821), 36653 states have internal predecessors, (110821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36654 states to 36654 states and 110821 transitions. [2021-06-05 23:34:27,773 INFO L78 Accepts]: Start accepts. Automaton has 36654 states and 110821 transitions. Word has length 49 [2021-06-05 23:34:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:27,773 INFO L482 AbstractCegarLoop]: Abstraction has 36654 states and 110821 transitions. [2021-06-05 23:34:27,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36654 states and 110821 transitions. [2021-06-05 23:34:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:34:27,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:27,827 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:28,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 23:34:28,039 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash -549490785, now seen corresponding path program 20 times [2021-06-05 23:34:28,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:28,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966970360] [2021-06-05 23:34:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:34:28,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966970360] [2021-06-05 23:34:28,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966970360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690927308] [2021-06-05 23:34:28,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:28,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:28,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:34:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:28,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:34:28,384 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 18 treesize of output 10 [2021-06-05 23:34:28,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:28,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:28,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:28,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-05 23:34:28,452 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 [2021-06-05 23:34:28,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:28,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:28,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:28,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:28,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690927308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:28,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:28,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:34:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638763547] [2021-06-05 23:34:28,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:34:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:34:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:34:28,502 INFO L87 Difference]: Start difference. First operand 36654 states and 110821 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:31,183 INFO L93 Difference]: Finished difference Result 103049 states and 309241 transitions. [2021-06-05 23:34:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 23:34:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 23:34:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:31,373 INFO L225 Difference]: With dead ends: 103049 [2021-06-05 23:34:31,373 INFO L226 Difference]: Without dead ends: 102356 [2021-06-05 23:34:31,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4810 ImplicationChecksByTransitivity, 1753.4ms TimeCoverageRelationStatistics Valid=2216, Invalid=10216, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 23:34:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102356 states. [2021-06-05 23:34:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102356 to 42498. [2021-06-05 23:34:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42498 states, 42497 states have (on average 3.0068946043250113) internal successors, (127784), 42497 states have internal predecessors, (127784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42498 states to 42498 states and 127784 transitions. [2021-06-05 23:34:32,671 INFO L78 Accepts]: Start accepts. Automaton has 42498 states and 127784 transitions. Word has length 51 [2021-06-05 23:34:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:32,671 INFO L482 AbstractCegarLoop]: Abstraction has 42498 states and 127784 transitions. [2021-06-05 23:34:32,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 42498 states and 127784 transitions. [2021-06-05 23:34:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:34:32,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:32,727 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:32,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:32,927 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1690828025, now seen corresponding path program 21 times [2021-06-05 23:34:32,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:32,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706540147] [2021-06-05 23:34:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:33,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706540147] [2021-06-05 23:34:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706540147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109765660] [2021-06-05 23:34:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:33,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:34:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:34:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:33,543 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 23:34:33,575 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_43, v_prenex_45], 1=[q3]} [2021-06-05 23:34:33,578 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 7 treesize of output 3 [2021-06-05 23:34:33,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:33,642 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.4 percent of original size [2021-06-05 23:34:33,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_45 vanished before elimination [2021-06-05 23:34:33,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:34:33,647 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 11 treesize of output 5 [2021-06-05 23:34:33,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:33,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:33,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:34:33,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:133, output treesize:84 [2021-06-05 23:34:33,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:34:33,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:33,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:34:33,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:33,767 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:34:33,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:34:33,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:33,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:34:33,785 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:99, output treesize:31 [2021-06-05 23:34:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:33,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109765660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:33,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:33,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-06-05 23:34:33,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255846886] [2021-06-05 23:34:33,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:34:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:33,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:34:33,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:34:33,897 INFO L87 Difference]: Start difference. First operand 42498 states and 127784 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:40,590 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-05 23:34:42,639 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 23:34:47,576 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 23:34:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:49,256 INFO L93 Difference]: Finished difference Result 63536 states and 189082 transitions. [2021-06-05 23:34:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-06-05 23:34:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:34:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:49,349 INFO L225 Difference]: With dead ends: 63536 [2021-06-05 23:34:49,349 INFO L226 Difference]: Without dead ends: 62627 [2021-06-05 23:34:49,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25551 ImplicationChecksByTransitivity, 13203.8ms TimeCoverageRelationStatistics Valid=6397, Invalid=54859, Unknown=0, NotChecked=0, Total=61256 [2021-06-05 23:34:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62627 states. [2021-06-05 23:34:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62627 to 43408. [2021-06-05 23:34:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43408 states, 43407 states have (on average 3.008708272859216) internal successors, (130599), 43407 states have internal predecessors, (130599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43408 states to 43408 states and 130599 transitions. [2021-06-05 23:34:50,164 INFO L78 Accepts]: Start accepts. Automaton has 43408 states and 130599 transitions. Word has length 54 [2021-06-05 23:34:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:50,164 INFO L482 AbstractCegarLoop]: Abstraction has 43408 states and 130599 transitions. [2021-06-05 23:34:50,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 43408 states and 130599 transitions. [2021-06-05 23:34:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:34:50,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:50,211 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:50,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 23:34:50,412 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:50,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1977773629, now seen corresponding path program 22 times [2021-06-05 23:34:50,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:50,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648088038] [2021-06-05 23:34:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:50,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648088038] [2021-06-05 23:34:50,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648088038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063062577] [2021-06-05 23:34:50,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:50,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:50,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:34:50,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:50,790 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 17 treesize of output 13 [2021-06-05 23:34:50,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:50,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:50,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:50,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-05 23:34:51,065 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_48], 1=[q3], 3=[q1, v_prenex_47]} [2021-06-05 23:34:51,068 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 21 treesize of output 13 [2021-06-05 23:34:51,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:51,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:51,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:51,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 23:34:51,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:51,123 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 21 treesize of output 13 [2021-06-05 23:34:51,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:51,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:51,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 23:34:51,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:51,170 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:34:51,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 23:34:51,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:51,194 INFO L628 ElimStorePlain]: treesize reduction 37, result has 44.8 percent of original size [2021-06-05 23:34:51,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-06-05 23:34:51,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:34:51,195 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:152, output treesize:28 [2021-06-05 23:34:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063062577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:51,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:51,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:34:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088222444] [2021-06-05 23:34:51,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:34:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:34:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:34:51,245 INFO L87 Difference]: Start difference. First operand 43408 states and 130599 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:51,689 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 23:34:54,248 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-06-05 23:34:56,657 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 23:34:57,266 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 23:34:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:58,145 INFO L93 Difference]: Finished difference Result 57791 states and 173149 transitions. [2021-06-05 23:34:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 23:34:58,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:34:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:58,233 INFO L225 Difference]: With dead ends: 57791 [2021-06-05 23:34:58,233 INFO L226 Difference]: Without dead ends: 55664 [2021-06-05 23:34:58,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8232 ImplicationChecksByTransitivity, 5610.0ms TimeCoverageRelationStatistics Valid=2289, Invalid=19173, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 23:34:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55664 states. [2021-06-05 23:34:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55664 to 42854. [2021-06-05 23:34:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42854 states, 42853 states have (on average 3.0055772057965604) internal successors, (128798), 42853 states have internal predecessors, (128798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42854 states to 42854 states and 128798 transitions. [2021-06-05 23:34:58,925 INFO L78 Accepts]: Start accepts. Automaton has 42854 states and 128798 transitions. Word has length 54 [2021-06-05 23:34:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:58,925 INFO L482 AbstractCegarLoop]: Abstraction has 42854 states and 128798 transitions. [2021-06-05 23:34:58,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 42854 states and 128798 transitions. [2021-06-05 23:34:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:34:59,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:59,203 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:59,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 23:34:59,405 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:59,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:59,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1049833869, now seen corresponding path program 23 times [2021-06-05 23:34:59,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:59,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080514657] [2021-06-05 23:34:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:59,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:59,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080514657] [2021-06-05 23:34:59,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080514657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:59,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104838083] [2021-06-05 23:34:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:59,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:34:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:34:59,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:34:59,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104838083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:59,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:59,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:34:59,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770257379] [2021-06-05 23:34:59,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:34:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:59,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:34:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:34:59,908 INFO L87 Difference]: Start difference. First operand 42854 states and 128798 transitions. Second operand has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:01,346 INFO L93 Difference]: Finished difference Result 74433 states and 223524 transitions. [2021-06-05 23:35:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:35:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:35:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:01,574 INFO L225 Difference]: With dead ends: 74433 [2021-06-05 23:35:01,574 INFO L226 Difference]: Without dead ends: 73438 [2021-06-05 23:35:01,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1763, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:35:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73438 states. [2021-06-05 23:35:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73438 to 51632. [2021-06-05 23:35:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51632 states, 51631 states have (on average 3.0211307160426877) internal successors, (155984), 51631 states have internal predecessors, (155984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51632 states to 51632 states and 155984 transitions. [2021-06-05 23:35:02,629 INFO L78 Accepts]: Start accepts. Automaton has 51632 states and 155984 transitions. Word has length 54 [2021-06-05 23:35:02,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:02,629 INFO L482 AbstractCegarLoop]: Abstraction has 51632 states and 155984 transitions. [2021-06-05 23:35:02,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 51632 states and 155984 transitions. [2021-06-05 23:35:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:35:02,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:02,701 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:02,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:02,902 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:02,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1128532211, now seen corresponding path program 24 times [2021-06-05 23:35:02,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:02,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590661424] [2021-06-05 23:35:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:03,308 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-06-05 23:35:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:35:03,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:03,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590661424] [2021-06-05 23:35:03,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590661424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:03,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087927592] [2021-06-05 23:35:03,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:03,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:35:03,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:35:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:03,550 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 17 treesize of output 13 [2021-06-05 23:35:03,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:03,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:03,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:03,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 23:35:04,146 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_53, v_prenex_55], 1=[v_prenex_51]} [2021-06-05 23:35:04,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 23:35:04,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 23:35:04,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,292 INFO L628 ElimStorePlain]: treesize reduction 7, result has 96.5 percent of original size [2021-06-05 23:35:04,297 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 30 treesize of output 18 [2021-06-05 23:35:04,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,360 INFO L628 ElimStorePlain]: treesize reduction 40, result has 77.7 percent of original size [2021-06-05 23:35:04,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:35:04,365 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 [2021-06-05 23:35:04,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,512 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-05 23:35:04,513 INFO L628 ElimStorePlain]: treesize reduction 7, result has 93.8 percent of original size [2021-06-05 23:35:04,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:35:04,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:221, output treesize:102 [2021-06-05 23:35:04,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:35:04,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:04,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:35:04,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,616 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:35:04,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 23:35:04,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:04,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:04,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:35:04,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:117, output treesize:43 [2021-06-05 23:35:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:04,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087927592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:04,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:04,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:35:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942487401] [2021-06-05 23:35:04,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:35:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:35:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:04,815 INFO L87 Difference]: Start difference. First operand 51632 states and 155984 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,106 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 23:35:06,401 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 23:35:06,607 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2021-06-05 23:35:06,743 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 23:35:06,965 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-06-05 23:35:07,306 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-06-05 23:35:07,677 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2021-06-05 23:35:08,142 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-05 23:35:08,598 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2021-06-05 23:35:08,757 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-06-05 23:35:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:11,392 INFO L93 Difference]: Finished difference Result 61707 states and 185313 transitions. [2021-06-05 23:35:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:35:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:35:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:11,484 INFO L225 Difference]: With dead ends: 61707 [2021-06-05 23:35:11,484 INFO L226 Difference]: Without dead ends: 60214 [2021-06-05 23:35:11,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 6208.3ms TimeCoverageRelationStatistics Valid=1318, Invalid=9188, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 23:35:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2021-06-05 23:35:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 51802. [2021-06-05 23:35:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51802 states, 51801 states have (on average 3.0208297137120903) internal successors, (156482), 51801 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51802 states to 51802 states and 156482 transitions. [2021-06-05 23:35:12,333 INFO L78 Accepts]: Start accepts. Automaton has 51802 states and 156482 transitions. Word has length 54 [2021-06-05 23:35:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:12,333 INFO L482 AbstractCegarLoop]: Abstraction has 51802 states and 156482 transitions. [2021-06-05 23:35:12,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 51802 states and 156482 transitions. [2021-06-05 23:35:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:35:12,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:12,404 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:12,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 23:35:12,604 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1974397899, now seen corresponding path program 25 times [2021-06-05 23:35:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:12,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125110966] [2021-06-05 23:35:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:35:12,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125110966] [2021-06-05 23:35:12,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125110966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879630069] [2021-06-05 23:35:12,827 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:35:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:13,010 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 21 treesize of output 13 [2021-06-05 23:35:13,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:13,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:13,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:13,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-06-05 23:35:13,676 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 23:35:13,866 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_58], 1=[q3], 3=[q1, v_prenex_57]} [2021-06-05 23:35:13,869 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 17 treesize of output 13 [2021-06-05 23:35:13,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:13,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:13,918 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 21 treesize of output 13 [2021-06-05 23:35:13,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:13,924 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:35:13,924 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 15 [2021-06-05 23:35:13,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:13,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 23:35:13,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:13,971 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:35:13,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 23:35:13,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:14,002 INFO L628 ElimStorePlain]: treesize reduction 37, result has 44.8 percent of original size [2021-06-05 23:35:14,002 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-06-05 23:35:14,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:35:14,003 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:146, output treesize:28 [2021-06-05 23:35:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:35:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879630069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:35:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005664845] [2021-06-05 23:35:14,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:35:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:14,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:35:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:14,092 INFO L87 Difference]: Start difference. First operand 51802 states and 156482 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:14,874 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 23:35:15,421 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 23:35:16,178 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-06-05 23:35:16,346 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 23:35:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:17,742 INFO L93 Difference]: Finished difference Result 67435 states and 201565 transitions. [2021-06-05 23:35:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:35:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:35:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:17,857 INFO L225 Difference]: With dead ends: 67435 [2021-06-05 23:35:17,857 INFO L226 Difference]: Without dead ends: 65786 [2021-06-05 23:35:17,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 3389.4ms TimeCoverageRelationStatistics Valid=789, Invalid=4613, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:35:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65786 states. [2021-06-05 23:35:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65786 to 51838. [2021-06-05 23:35:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51838 states, 51837 states have (on average 3.020603044157648) internal successors, (156579), 51837 states have internal predecessors, (156579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51838 states to 51838 states and 156579 transitions. [2021-06-05 23:35:18,802 INFO L78 Accepts]: Start accepts. Automaton has 51838 states and 156579 transitions. Word has length 54 [2021-06-05 23:35:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:18,802 INFO L482 AbstractCegarLoop]: Abstraction has 51838 states and 156579 transitions. [2021-06-05 23:35:18,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 51838 states and 156579 transitions. [2021-06-05 23:35:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:35:18,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:18,871 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:19,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:19,072 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1518754715, now seen corresponding path program 26 times [2021-06-05 23:35:19,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:19,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546046689] [2021-06-05 23:35:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:19,272 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-06-05 23:35:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:35:19,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:19,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546046689] [2021-06-05 23:35:19,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546046689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:19,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982747491] [2021-06-05 23:35:19,488 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:19,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:19,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:35:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:19,722 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 21 treesize of output 13 [2021-06-05 23:35:19,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:19,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:19,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:19,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:40 [2021-06-05 23:35:20,086 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_65], 1=[v_prenex_63], 3=[v_prenex_61], 6=[q1, v_prenex_67]} [2021-06-05 23:35:20,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 23:35:20,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:20,139 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 30 treesize of output 18 [2021-06-05 23:35:20,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:20,186 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:35:20,186 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 [2021-06-05 23:35:20,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,255 INFO L628 ElimStorePlain]: treesize reduction 7, result has 95.2 percent of original size [2021-06-05 23:35:20,260 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:35:20,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:35:20,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:20,296 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 23:35:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:35:20,298 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:20,326 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:35:20,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:35:20,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,362 INFO L628 ElimStorePlain]: treesize reduction 15, result has 71.2 percent of original size [2021-06-05 23:35:20,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:35:20,363 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:196, output treesize:37 [2021-06-05 23:35:20,535 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 23:35:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 23:35:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982747491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:20,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:20,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:35:20,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038793100] [2021-06-05 23:35:20,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:20,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:20,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:20,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:20,539 INFO L87 Difference]: Start difference. First operand 51838 states and 156579 transitions. Second operand has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:23,539 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 23:35:23,893 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 23:35:24,032 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 23:35:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:26,372 INFO L93 Difference]: Finished difference Result 63014 states and 189832 transitions. [2021-06-05 23:35:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:35:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:35:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:26,465 INFO L225 Difference]: With dead ends: 63014 [2021-06-05 23:35:26,466 INFO L226 Difference]: Without dead ends: 62505 [2021-06-05 23:35:26,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4534.8ms TimeCoverageRelationStatistics Valid=1257, Invalid=11175, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 23:35:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62505 states. [2021-06-05 23:35:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62505 to 52176. [2021-06-05 23:35:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52176 states, 52175 states have (on average 3.020776233828462) internal successors, (157609), 52175 states have internal predecessors, (157609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52176 states to 52176 states and 157609 transitions. [2021-06-05 23:35:27,527 INFO L78 Accepts]: Start accepts. Automaton has 52176 states and 157609 transitions. Word has length 56 [2021-06-05 23:35:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:27,527 INFO L482 AbstractCegarLoop]: Abstraction has 52176 states and 157609 transitions. [2021-06-05 23:35:27,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 52176 states and 157609 transitions. [2021-06-05 23:35:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:35:27,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:27,600 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:27,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:27,801 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 384167611, now seen corresponding path program 27 times [2021-06-05 23:35:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:27,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331921633] [2021-06-05 23:35:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:35:27,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:27,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331921633] [2021-06-05 23:35:27,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331921633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:27,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917851443] [2021-06-05 23:35:27,999 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:28,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:35:28,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:28,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:35:28,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:28,191 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:35:28,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 23:35:28,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:28,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:28,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:28,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-05 23:35:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:35:28,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917851443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:28,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:28,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2021-06-05 23:35:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344535013] [2021-06-05 23:35:28,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:35:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:35:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:35:28,235 INFO L87 Difference]: Start difference. First operand 52176 states and 157609 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:36,314 INFO L93 Difference]: Finished difference Result 158134 states and 474113 transitions. [2021-06-05 23:35:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-05 23:35:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:35:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:36,778 INFO L225 Difference]: With dead ends: 158134 [2021-06-05 23:35:36,778 INFO L226 Difference]: Without dead ends: 156093 [2021-06-05 23:35:36,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18881 ImplicationChecksByTransitivity, 6372.3ms TimeCoverageRelationStatistics Valid=6475, Invalid=37415, Unknown=0, NotChecked=0, Total=43890 [2021-06-05 23:35:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156093 states. [2021-06-05 23:35:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156093 to 72800. [2021-06-05 23:35:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72800 states, 72799 states have (on average 3.02181348644899) internal successors, (219985), 72799 states have internal predecessors, (219985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72800 states to 72800 states and 219985 transitions. [2021-06-05 23:35:38,811 INFO L78 Accepts]: Start accepts. Automaton has 72800 states and 219985 transitions. Word has length 56 [2021-06-05 23:35:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:38,811 INFO L482 AbstractCegarLoop]: Abstraction has 72800 states and 219985 transitions. [2021-06-05 23:35:38,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 72800 states and 219985 transitions. [2021-06-05 23:35:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:35:38,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:38,922 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:39,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:39,133 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1255614645, now seen corresponding path program 28 times [2021-06-05 23:35:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:39,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480433312] [2021-06-05 23:35:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:35:39,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480433312] [2021-06-05 23:35:39,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480433312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890957848] [2021-06-05 23:35:39,290 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:39,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:35:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:39,537 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 21 treesize of output 13 [2021-06-05 23:35:39,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:39,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:43 [2021-06-05 23:35:39,844 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_72], 1=[q3], 6=[q1, v_prenex_71]} [2021-06-05 23:35:39,847 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 17 treesize of output 13 [2021-06-05 23:35:39,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:39,895 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 21 treesize of output 13 [2021-06-05 23:35:39,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,904 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:35:39,904 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 15 [2021-06-05 23:35:39,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:39,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:35:39,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,950 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:35:39,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:35:39,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,975 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-05 23:35:39,975 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-06-05 23:35:39,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:35:39,976 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-05 23:35:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:35:40,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890957848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:40,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:40,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 23:35:40,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374144533] [2021-06-05 23:35:40,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:40,027 INFO L87 Difference]: Start difference. First operand 72800 states and 219985 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:44,133 INFO L93 Difference]: Finished difference Result 113403 states and 342039 transitions. [2021-06-05 23:35:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 23:35:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:35:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:44,319 INFO L225 Difference]: With dead ends: 113403 [2021-06-05 23:35:44,320 INFO L226 Difference]: Without dead ends: 110881 [2021-06-05 23:35:44,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3469 ImplicationChecksByTransitivity, 2834.9ms TimeCoverageRelationStatistics Valid=1029, Invalid=9071, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:35:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110881 states. [2021-06-05 23:35:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110881 to 72688. [2021-06-05 23:35:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72688 states, 72687 states have (on average 3.0223974025616687) internal successors, (219689), 72687 states have internal predecessors, (219689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72688 states to 72688 states and 219689 transitions. [2021-06-05 23:35:45,962 INFO L78 Accepts]: Start accepts. Automaton has 72688 states and 219689 transitions. Word has length 56 [2021-06-05 23:35:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:45,963 INFO L482 AbstractCegarLoop]: Abstraction has 72688 states and 219689 transitions. [2021-06-05 23:35:45,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 72688 states and 219689 transitions. [2021-06-05 23:35:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:35:46,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:46,055 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:46,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:46,260 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:46,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1957956279, now seen corresponding path program 29 times [2021-06-05 23:35:46,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:46,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063014060] [2021-06-05 23:35:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:35:46,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:46,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063014060] [2021-06-05 23:35:46,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063014060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:46,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746240204] [2021-06-05 23:35:46,775 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:46,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:35:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:35:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:46,961 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:35:46,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:35:46,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:46,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:46,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:46,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:35:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:35:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746240204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:47,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:47,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-06-05 23:35:47,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956747074] [2021-06-05 23:35:47,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:35:47,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:35:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:35:47,020 INFO L87 Difference]: Start difference. First operand 72688 states and 219689 transitions. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:52,261 INFO L93 Difference]: Finished difference Result 170493 states and 513114 transitions. [2021-06-05 23:35:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 23:35:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:35:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:52,559 INFO L225 Difference]: With dead ends: 170493 [2021-06-05 23:35:52,559 INFO L226 Difference]: Without dead ends: 169553 [2021-06-05 23:35:52,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8291 ImplicationChecksByTransitivity, 3329.2ms TimeCoverageRelationStatistics Valid=3453, Invalid=17427, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:35:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169553 states. [2021-06-05 23:35:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169553 to 74806. [2021-06-05 23:35:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74806 states, 74805 states have (on average 3.0193168905821803) internal successors, (225860), 74805 states have internal predecessors, (225860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74806 states to 74806 states and 225860 transitions. [2021-06-05 23:35:54,568 INFO L78 Accepts]: Start accepts. Automaton has 74806 states and 225860 transitions. Word has length 56 [2021-06-05 23:35:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:54,568 INFO L482 AbstractCegarLoop]: Abstraction has 74806 states and 225860 transitions. [2021-06-05 23:35:54,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 74806 states and 225860 transitions. [2021-06-05 23:35:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:35:54,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:54,662 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:54,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 23:35:54,863 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash 189610307, now seen corresponding path program 30 times [2021-06-05 23:35:54,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:54,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976740024] [2021-06-05 23:35:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:55,309 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 13 [2021-06-05 23:35:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:35:55,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976740024] [2021-06-05 23:35:55,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976740024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214932558] [2021-06-05 23:35:55,383 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:55,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:35:55,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:35:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:35:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:35:55,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:55,711 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:35:55,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:35:55,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:55,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:55,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:35:55,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 23:35:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:35:55,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214932558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:55,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:55,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 23:35:55,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358433293] [2021-06-05 23:35:55,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:55,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:55,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:55,793 INFO L87 Difference]: Start difference. First operand 74806 states and 225860 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:01,958 INFO L93 Difference]: Finished difference Result 187352 states and 562565 transitions. [2021-06-05 23:36:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-05 23:36:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:36:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:02,262 INFO L225 Difference]: With dead ends: 187352 [2021-06-05 23:36:02,262 INFO L226 Difference]: Without dead ends: 186098 [2021-06-05 23:36:02,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10262 ImplicationChecksByTransitivity, 4593.5ms TimeCoverageRelationStatistics Valid=3411, Invalid=22029, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 23:36:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186098 states. [2021-06-05 23:36:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186098 to 91016. [2021-06-05 23:36:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91016 states, 91015 states have (on average 3.040839422073285) internal successors, (276762), 91015 states have internal predecessors, (276762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91016 states to 91016 states and 276762 transitions. [2021-06-05 23:36:04,972 INFO L78 Accepts]: Start accepts. Automaton has 91016 states and 276762 transitions. Word has length 56 [2021-06-05 23:36:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:04,972 INFO L482 AbstractCegarLoop]: Abstraction has 91016 states and 276762 transitions. [2021-06-05 23:36:04,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 91016 states and 276762 transitions. [2021-06-05 23:36:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:36:05,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:05,090 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:05,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:05,298 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:05,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1734125747, now seen corresponding path program 31 times [2021-06-05 23:36:05,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:05,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380303665] [2021-06-05 23:36:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:36:05,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:05,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380303665] [2021-06-05 23:36:05,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380303665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:05,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978277920] [2021-06-05 23:36:05,639 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:36:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:05,862 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 21 treesize of output 13 [2021-06-05 23:36:05,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:05,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:05,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:05,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-06-05 23:36:06,312 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 23:36:06,655 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_76], 6=[q1], 10=[v_prenex_75]} [2021-06-05 23:36:06,659 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 21 treesize of output 13 [2021-06-05 23:36:06,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:06,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:06,708 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 21 treesize of output 13 [2021-06-05 23:36:06,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:06,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:36:06,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:06,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:06,753 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:36:06,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:36:06,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:06,793 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.9 percent of original size [2021-06-05 23:36:06,797 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:36:06,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 23:36:06,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:06,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:06,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:36:06,810 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:172, output treesize:25 [2021-06-05 23:36:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:36:06,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978277920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:06,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:06,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 23:36:06,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343651857] [2021-06-05 23:36:06,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:36:06,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:06,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:36:06,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:36:06,902 INFO L87 Difference]: Start difference. First operand 91016 states and 276762 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:08,411 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-06-05 23:36:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:11,141 INFO L93 Difference]: Finished difference Result 133556 states and 405201 transitions. [2021-06-05 23:36:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:36:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:36:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:11,348 INFO L225 Difference]: With dead ends: 133556 [2021-06-05 23:36:11,349 INFO L226 Difference]: Without dead ends: 130250 [2021-06-05 23:36:11,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 3246.5ms TimeCoverageRelationStatistics Valid=1210, Invalid=8102, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 23:36:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130250 states. [2021-06-05 23:36:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130250 to 96219. [2021-06-05 23:36:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96219 states, 96218 states have (on average 3.0401899852418466) internal successors, (292521), 96218 states have internal predecessors, (292521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96219 states to 96219 states and 292521 transitions. [2021-06-05 23:36:13,393 INFO L78 Accepts]: Start accepts. Automaton has 96219 states and 292521 transitions. Word has length 56 [2021-06-05 23:36:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:13,394 INFO L482 AbstractCegarLoop]: Abstraction has 96219 states and 292521 transitions. [2021-06-05 23:36:13,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 96219 states and 292521 transitions. [2021-06-05 23:36:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:36:13,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:13,525 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:13,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:13,725 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash -210435843, now seen corresponding path program 32 times [2021-06-05 23:36:13,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:13,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230758707] [2021-06-05 23:36:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:36:13,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:13,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230758707] [2021-06-05 23:36:13,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230758707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:13,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530463332] [2021-06-05 23:36:13,915 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:13,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:13,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:36:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:14,101 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 21 treesize of output 13 [2021-06-05 23:36:14,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:14,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:14,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:14,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:36 [2021-06-05 23:36:14,765 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 23:36:14,847 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_85], 1=[v_prenex_79], 3=[v_prenex_78], 6=[q1, v_prenex_84]} [2021-06-05 23:36:14,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 23:36:14,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:14,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:14,900 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 30 treesize of output 18 [2021-06-05 23:36:14,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:14,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:14,945 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:36:14,945 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 [2021-06-05 23:36:14,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:15,013 INFO L628 ElimStorePlain]: treesize reduction 7, result has 95.2 percent of original size [2021-06-05 23:36:15,018 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:36:15,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:36:15,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:15,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:15,054 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 23:36:15,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:36:15,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:15,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:15,083 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:36:15,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:36:15,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:15,112 INFO L628 ElimStorePlain]: treesize reduction 15, result has 71.2 percent of original size [2021-06-05 23:36:15,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:36:15,113 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:196, output treesize:37 [2021-06-05 23:36:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:36:15,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530463332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:15,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:36:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724785079] [2021-06-05 23:36:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:36:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:36:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:36:15,168 INFO L87 Difference]: Start difference. First operand 96219 states and 292521 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:17,026 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 23:36:20,218 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-06-05 23:36:21,763 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 23:36:21,984 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 23:36:25,889 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-05 23:36:26,656 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 23:36:27,724 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 23:36:27,892 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-05 23:36:28,055 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-06-05 23:36:28,779 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 23:36:30,293 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-06-05 23:36:30,673 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 23:36:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:32,520 INFO L93 Difference]: Finished difference Result 118761 states and 358389 transitions. [2021-06-05 23:36:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-05 23:36:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:36:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:32,708 INFO L225 Difference]: With dead ends: 118761 [2021-06-05 23:36:32,709 INFO L226 Difference]: Without dead ends: 116293 [2021-06-05 23:36:32,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28935 ImplicationChecksByTransitivity, 14975.0ms TimeCoverageRelationStatistics Valid=9125, Invalid=57181, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 23:36:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116293 states. [2021-06-05 23:36:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116293 to 96441. [2021-06-05 23:36:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96441 states, 96440 states have (on average 3.04013894649523) internal successors, (293191), 96440 states have internal predecessors, (293191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96441 states to 96441 states and 293191 transitions. [2021-06-05 23:36:34,572 INFO L78 Accepts]: Start accepts. Automaton has 96441 states and 293191 transitions. Word has length 56 [2021-06-05 23:36:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:34,572 INFO L482 AbstractCegarLoop]: Abstraction has 96441 states and 293191 transitions. [2021-06-05 23:36:34,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 96441 states and 293191 transitions. [2021-06-05 23:36:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:36:34,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:34,702 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:34,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 23:36:34,903 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:34,904 INFO L82 PathProgramCache]: Analyzing trace with hash -150730999, now seen corresponding path program 33 times [2021-06-05 23:36:34,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:34,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659286042] [2021-06-05 23:36:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:35,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:35,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659286042] [2021-06-05 23:36:35,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659286042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:35,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599939687] [2021-06-05 23:36:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:35,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:36:35,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:36:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:35,672 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 23:36:35,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:35,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:35,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:35,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:36:35,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:35,948 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:36:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:36:35,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:35,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:35,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:36:35,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 23:36:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:36,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599939687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:36,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:36,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 23:36:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265963976] [2021-06-05 23:36:36,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:36:36,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:36:36,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:36:36,009 INFO L87 Difference]: Start difference. First operand 96441 states and 293191 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,039 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-05 23:36:45,343 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 23:36:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:45,461 INFO L93 Difference]: Finished difference Result 182758 states and 548785 transitions. [2021-06-05 23:36:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-06-05 23:36:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:36:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:45,769 INFO L225 Difference]: With dead ends: 182758 [2021-06-05 23:36:45,769 INFO L226 Difference]: Without dead ends: 182224 [2021-06-05 23:36:45,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18105 ImplicationChecksByTransitivity, 7483.4ms TimeCoverageRelationStatistics Valid=8177, Invalid=34053, Unknown=0, NotChecked=0, Total=42230 [2021-06-05 23:36:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182224 states. [2021-06-05 23:36:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182224 to 87933. [2021-06-05 23:36:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87933 states, 87932 states have (on average 3.0219601510257927) internal successors, (265727), 87932 states have internal predecessors, (265727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87933 states to 87933 states and 265727 transitions. [2021-06-05 23:36:48,116 INFO L78 Accepts]: Start accepts. Automaton has 87933 states and 265727 transitions. Word has length 56 [2021-06-05 23:36:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:48,116 INFO L482 AbstractCegarLoop]: Abstraction has 87933 states and 265727 transitions. [2021-06-05 23:36:48,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 87933 states and 265727 transitions. [2021-06-05 23:36:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:36:48,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:48,231 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:48,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:36:48,434 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:48,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1534591291, now seen corresponding path program 34 times [2021-06-05 23:36:48,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:48,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770645405] [2021-06-05 23:36:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:36:48,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:48,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770645405] [2021-06-05 23:36:48,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770645405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:48,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751941294] [2021-06-05 23:36:48,669 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:48,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:36:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:48,813 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 21 treesize of output 13 [2021-06-05 23:36:48,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:48,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:48,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:48,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-05 23:36:49,172 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_90], 1=[q3], 6=[q1, v_prenex_88]} [2021-06-05 23:36:49,176 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 17 treesize of output 13 [2021-06-05 23:36:49,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:49,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:36:49,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:49,222 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 21 treesize of output 13 [2021-06-05 23:36:49,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:49,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:49,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:36:49,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:36:49,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:49,273 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:36:49,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:36:49,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:49,298 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-05 23:36:49,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 23:36:49,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:36:49,299 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-05 23:36:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:36:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751941294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:49,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:49,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 23:36:49,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161930451] [2021-06-05 23:36:49,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:49,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:49,345 INFO L87 Difference]: Start difference. First operand 87933 states and 265727 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:49,760 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-06-05 23:36:52,174 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2021-06-05 23:36:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:52,523 INFO L93 Difference]: Finished difference Result 103575 states and 312132 transitions. [2021-06-05 23:36:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:36:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:36:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:52,696 INFO L225 Difference]: With dead ends: 103575 [2021-06-05 23:36:52,696 INFO L226 Difference]: Without dead ends: 102231 [2021-06-05 23:36:52,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2243.6ms TimeCoverageRelationStatistics Valid=787, Invalid=3905, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:36:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102231 states. [2021-06-05 23:36:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102231 to 88331. [2021-06-05 23:36:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88331 states, 88330 states have (on average 3.0222461224951886) internal successors, (266955), 88330 states have internal predecessors, (266955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88331 states to 88331 states and 266955 transitions. [2021-06-05 23:36:54,218 INFO L78 Accepts]: Start accepts. Automaton has 88331 states and 266955 transitions. Word has length 56 [2021-06-05 23:36:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:54,219 INFO L482 AbstractCegarLoop]: Abstraction has 88331 states and 266955 transitions. [2021-06-05 23:36:54,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 88331 states and 266955 transitions. [2021-06-05 23:36:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:36:54,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:54,333 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:54,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:54,537 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:54,537 INFO L82 PathProgramCache]: Analyzing trace with hash -446962657, now seen corresponding path program 35 times [2021-06-05 23:36:54,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:54,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534947037] [2021-06-05 23:36:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:55,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534947037] [2021-06-05 23:36:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534947037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431943997] [2021-06-05 23:36:55,362 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:55,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:36:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:36:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:55,837 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_92, q3], 1=[v_prenex_94, v_prenex_96], 3=[v_prenex_98]} [2021-06-05 23:36:55,842 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 7 treesize of output 3 [2021-06-05 23:36:55,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:55,960 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 23:36:55,960 INFO L628 ElimStorePlain]: treesize reduction 38, result has 83.3 percent of original size [2021-06-05 23:36:55,960 INFO L518 ElimStorePlain]: Eliminatee q3 vanished before elimination [2021-06-05 23:36:55,966 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:36:55,966 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 13 treesize of output 5 [2021-06-05 23:36:55,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:56,048 INFO L628 ElimStorePlain]: treesize reduction 37, result has 79.1 percent of original size [2021-06-05 23:36:56,048 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 23:36:56,052 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:36:56,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-05 23:36:56,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:56,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:56,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:36:56,085 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:235, output treesize:124 [2021-06-05 23:36:56,203 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:36:56,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:36:56,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:56,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:56,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:56,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:36:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:56,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431943997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:56,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:56,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 23:36:56,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959038591] [2021-06-05 23:36:56,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:36:56,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:36:56,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:36:56,263 INFO L87 Difference]: Start difference. First operand 88331 states and 266955 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:02,945 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 23:37:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:05,059 INFO L93 Difference]: Finished difference Result 135112 states and 404915 transitions. [2021-06-05 23:37:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-05 23:37:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:37:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:05,426 INFO L225 Difference]: With dead ends: 135112 [2021-06-05 23:37:05,426 INFO L226 Difference]: Without dead ends: 134978 [2021-06-05 23:37:05,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 6392.2ms TimeCoverageRelationStatistics Valid=4484, Invalid=22576, Unknown=0, NotChecked=0, Total=27060 [2021-06-05 23:37:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134978 states. [2021-06-05 23:37:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134978 to 88414. [2021-06-05 23:37:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88414 states, 88413 states have (on average 3.0223044122470677) internal successors, (267211), 88413 states have internal predecessors, (267211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88414 states to 88414 states and 267211 transitions. [2021-06-05 23:37:07,108 INFO L78 Accepts]: Start accepts. Automaton has 88414 states and 267211 transitions. Word has length 56 [2021-06-05 23:37:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:07,108 INFO L482 AbstractCegarLoop]: Abstraction has 88414 states and 267211 transitions. [2021-06-05 23:37:07,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 88414 states and 267211 transitions. [2021-06-05 23:37:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:37:07,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:07,227 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:07,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 23:37:07,428 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1594296135, now seen corresponding path program 36 times [2021-06-05 23:37:07,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:07,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339776155] [2021-06-05 23:37:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:07,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339776155] [2021-06-05 23:37:07,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339776155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39397668] [2021-06-05 23:37:07,741 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:07,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:37:07,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:37:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:08,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:37:08,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:08,589 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:37:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:37:08,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:08,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:08,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:37:08,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 23:37:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39397668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:08,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:08,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 23:37:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219763936] [2021-06-05 23:37:08,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:37:08,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:37:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:37:08,661 INFO L87 Difference]: Start difference. First operand 88414 states and 267211 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:18,217 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 23:37:18,978 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-06-05 23:37:21,387 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 23:37:22,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:22,254 INFO L93 Difference]: Finished difference Result 210505 states and 628873 transitions. [2021-06-05 23:37:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 23:37:22,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:37:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:22,649 INFO L225 Difference]: With dead ends: 210505 [2021-06-05 23:37:22,649 INFO L226 Difference]: Without dead ends: 210505 [2021-06-05 23:37:22,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26802 ImplicationChecksByTransitivity, 10774.1ms TimeCoverageRelationStatistics Valid=10131, Invalid=51125, Unknown=0, NotChecked=0, Total=61256 [2021-06-05 23:37:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210505 states. [2021-06-05 23:37:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210505 to 94167. [2021-06-05 23:37:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94167 states, 94166 states have (on average 3.0259541660471934) internal successors, (284942), 94166 states have internal predecessors, (284942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94167 states to 94167 states and 284942 transitions. [2021-06-05 23:37:25,223 INFO L78 Accepts]: Start accepts. Automaton has 94167 states and 284942 transitions. Word has length 56 [2021-06-05 23:37:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:25,223 INFO L482 AbstractCegarLoop]: Abstraction has 94167 states and 284942 transitions. [2021-06-05 23:37:25,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 94167 states and 284942 transitions. [2021-06-05 23:37:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:37:25,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:25,352 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:25,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:25,553 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1648612163, now seen corresponding path program 37 times [2021-06-05 23:37:25,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:25,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614452045] [2021-06-05 23:37:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:26,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:26,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614452045] [2021-06-05 23:37:26,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614452045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:26,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114515334] [2021-06-05 23:37:26,336 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:37:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:26,486 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 21 treesize of output 13 [2021-06-05 23:37:26,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:26,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:26,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:26,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-05 23:37:26,845 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, v_prenex_104, v_prenex_106], 1=[v_prenex_100], 3=[q3]} [2021-06-05 23:37:26,849 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 21 treesize of output 13 [2021-06-05 23:37:26,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:26,965 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 23:37:26,965 INFO L628 ElimStorePlain]: treesize reduction 49, result has 84.0 percent of original size [2021-06-05 23:37:26,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 23:37:26,968 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 9 [2021-06-05 23:37:26,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:27,030 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:37:27,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15 [2021-06-05 23:37:27,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 23:37:27,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,093 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:37:27,093 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 [2021-06-05 23:37:27,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,165 INFO L628 ElimStorePlain]: treesize reduction 26, result has 84.4 percent of original size [2021-06-05 23:37:27,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:37:27,167 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:317, output treesize:137 [2021-06-05 23:37:27,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:37:27,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:37:27,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:27,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 23:37:27,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,268 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:37:27,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 23:37:27,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:27,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:27,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:37:27,291 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:48 [2021-06-05 23:37:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:27,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114515334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:27,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:27,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-06-05 23:37:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142723138] [2021-06-05 23:37:27,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:37:27,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:37:27,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:37:27,456 INFO L87 Difference]: Start difference. First operand 94167 states and 284942 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:29,766 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 23:37:30,546 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 23:37:30,966 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-05 23:37:31,862 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 23:37:32,025 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 23:37:32,603 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-06-05 23:37:33,262 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 23:37:33,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-05 23:37:33,852 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-05 23:37:39,609 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-05 23:37:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:39,835 INFO L93 Difference]: Finished difference Result 145326 states and 435894 transitions. [2021-06-05 23:37:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-05 23:37:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:37:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:40,056 INFO L225 Difference]: With dead ends: 145326 [2021-06-05 23:37:40,056 INFO L226 Difference]: Without dead ends: 144746 [2021-06-05 23:37:40,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16142 ImplicationChecksByTransitivity, 11299.0ms TimeCoverageRelationStatistics Valid=6761, Invalid=30295, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 23:37:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144746 states. [2021-06-05 23:37:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144746 to 94431. [2021-06-05 23:37:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94431 states, 94430 states have (on average 3.0269300010589855) internal successors, (285833), 94430 states have internal predecessors, (285833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94431 states to 94431 states and 285833 transitions. [2021-06-05 23:37:42,340 INFO L78 Accepts]: Start accepts. Automaton has 94431 states and 285833 transitions. Word has length 56 [2021-06-05 23:37:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:42,341 INFO L482 AbstractCegarLoop]: Abstraction has 94431 states and 285833 transitions. [2021-06-05 23:37:42,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 94431 states and 285833 transitions. [2021-06-05 23:37:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:37:42,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:42,460 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:42,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 23:37:42,661 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1347602821, now seen corresponding path program 38 times [2021-06-05 23:37:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:42,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580290391] [2021-06-05 23:37:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:42,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580290391] [2021-06-05 23:37:42,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580290391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293335927] [2021-06-05 23:37:42,969 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:43,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:43,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:43,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:43,352 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_112], 1=[v_prenex_108, v_prenex_114], 3=[v_prenex_110]} [2021-06-05 23:37:43,356 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 5 treesize of output 3 [2021-06-05 23:37:43,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:43,416 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 7 treesize of output 3 [2021-06-05 23:37:43,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,510 INFO L628 ElimStorePlain]: treesize reduction 33, result has 85.2 percent of original size [2021-06-05 23:37:43,515 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:37:43,515 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 11 treesize of output 5 [2021-06-05 23:37:43,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:43,563 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:37:43,563 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 13 treesize of output 5 [2021-06-05 23:37:43,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,632 INFO L628 ElimStorePlain]: treesize reduction 26, result has 84.3 percent of original size [2021-06-05 23:37:43,635 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:37:43,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-05 23:37:43,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:43,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:37:43,668 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:235, output treesize:124 [2021-06-05 23:37:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 23:37:43,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:37:43,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:37:43,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,765 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:37:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:37:43,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:43,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:37:43,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:144, output treesize:41 [2021-06-05 23:37:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:43,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293335927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:43,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:43,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 23:37:43,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991398863] [2021-06-05 23:37:43,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:37:43,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:37:43,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:37:43,893 INFO L87 Difference]: Start difference. First operand 94431 states and 285833 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:48,167 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-05 23:37:52,367 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 23:37:52,985 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-05 23:37:54,681 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 23:37:55,412 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 23:37:55,620 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 23:37:57,359 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 23:37:58,189 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 23:37:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:58,583 INFO L93 Difference]: Finished difference Result 144735 states and 434420 transitions. [2021-06-05 23:37:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-05 23:37:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:37:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:58,840 INFO L225 Difference]: With dead ends: 144735 [2021-06-05 23:37:58,840 INFO L226 Difference]: Without dead ends: 144001 [2021-06-05 23:37:58,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17827 ImplicationChecksByTransitivity, 12621.9ms TimeCoverageRelationStatistics Valid=6322, Invalid=37988, Unknown=0, NotChecked=0, Total=44310 [2021-06-05 23:37:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144001 states. [2021-06-05 23:38:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144001 to 94515. [2021-06-05 23:38:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94515 states, 94514 states have (on average 3.02658865353281) internal successors, (286055), 94514 states have internal predecessors, (286055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94515 states to 94515 states and 286055 transitions. [2021-06-05 23:38:01,154 INFO L78 Accepts]: Start accepts. Automaton has 94515 states and 286055 transitions. Word has length 56 [2021-06-05 23:38:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:01,154 INFO L482 AbstractCegarLoop]: Abstraction has 94515 states and 286055 transitions. [2021-06-05 23:38:01,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 94515 states and 286055 transitions. [2021-06-05 23:38:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:38:01,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:01,322 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:01,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:01,538 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1436448654, now seen corresponding path program 39 times [2021-06-05 23:38:01,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:01,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271432730] [2021-06-05 23:38:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:38:01,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271432730] [2021-06-05 23:38:01,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271432730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634596009] [2021-06-05 23:38:01,758 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:01,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:38:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:38:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:01,946 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:38:01,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:38:01,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:01,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:01,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:01,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 23:38:02,063 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 [2021-06-05 23:38:02,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:02,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:02,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:02,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 23:38:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:02,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634596009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:02,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:02,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 23:38:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023803260] [2021-06-05 23:38:02,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:38:02,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:02,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:38:02,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:38:02,140 INFO L87 Difference]: Start difference. First operand 94515 states and 286055 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:05,881 INFO L93 Difference]: Finished difference Result 168094 states and 509048 transitions. [2021-06-05 23:38:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 23:38:05,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:38:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:06,442 INFO L225 Difference]: With dead ends: 168094 [2021-06-05 23:38:06,442 INFO L226 Difference]: Without dead ends: 161191 [2021-06-05 23:38:06,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 2265.6ms TimeCoverageRelationStatistics Valid=1410, Invalid=9932, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 23:38:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161191 states. [2021-06-05 23:38:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161191 to 63031. [2021-06-05 23:38:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63031 states, 63030 states have (on average 3.0277962874821513) internal successors, (190842), 63030 states have internal predecessors, (190842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63031 states to 63031 states and 190842 transitions. [2021-06-05 23:38:08,133 INFO L78 Accepts]: Start accepts. Automaton has 63031 states and 190842 transitions. Word has length 56 [2021-06-05 23:38:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:08,133 INFO L482 AbstractCegarLoop]: Abstraction has 63031 states and 190842 transitions. [2021-06-05 23:38:08,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 63031 states and 190842 transitions. [2021-06-05 23:38:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:38:08,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:08,213 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:08,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:08,435 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 120447938, now seen corresponding path program 40 times [2021-06-05 23:38:08,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:08,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136036693] [2021-06-05 23:38:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:08,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136036693] [2021-06-05 23:38:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136036693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988115743] [2021-06-05 23:38:08,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:08,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:38:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:38:08,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:08,963 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 21 treesize of output 13 [2021-06-05 23:38:08,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:08,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:08,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:08,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 23:38:09,286 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_116], 10=[q1]} [2021-06-05 23:38:09,289 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 21 treesize of output 13 [2021-06-05 23:38:09,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:09,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:09,319 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 21 treesize of output 13 [2021-06-05 23:38:09,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:09,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:09,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:09,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:38:09,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:09,358 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:38:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:38:09,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:09,376 INFO L628 ElimStorePlain]: treesize reduction 12, result has 65.7 percent of original size [2021-06-05 23:38:09,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:38:09,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:21 [2021-06-05 23:38:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:38:09,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988115743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:09,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:09,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-06-05 23:38:09,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791001803] [2021-06-05 23:38:09,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:38:09,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:38:09,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:38:09,442 INFO L87 Difference]: Start difference. First operand 63031 states and 190842 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:12,644 INFO L93 Difference]: Finished difference Result 107642 states and 325348 transitions. [2021-06-05 23:38:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:38:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:38:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:12,807 INFO L225 Difference]: With dead ends: 107642 [2021-06-05 23:38:12,808 INFO L226 Difference]: Without dead ends: 102118 [2021-06-05 23:38:12,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2208.4ms TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:38:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102118 states. [2021-06-05 23:38:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102118 to 66355. [2021-06-05 23:38:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66355 states, 66354 states have (on average 3.0275642764565815) internal successors, (200891), 66354 states have internal predecessors, (200891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66355 states to 66355 states and 200891 transitions. [2021-06-05 23:38:14,142 INFO L78 Accepts]: Start accepts. Automaton has 66355 states and 200891 transitions. Word has length 56 [2021-06-05 23:38:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:14,143 INFO L482 AbstractCegarLoop]: Abstraction has 66355 states and 200891 transitions. [2021-06-05 23:38:14,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 66355 states and 200891 transitions. [2021-06-05 23:38:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:38:14,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:14,226 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:14,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:14,429 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:14,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2111806327, now seen corresponding path program 41 times [2021-06-05 23:38:14,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:14,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671689178] [2021-06-05 23:38:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:38:14,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671689178] [2021-06-05 23:38:14,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671689178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097046453] [2021-06-05 23:38:14,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:14,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:38:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:38:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:14,828 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:38:14,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 23:38:14,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:14,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:14,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:14,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-05 23:38:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:38:14,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097046453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:14,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:14,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-06-05 23:38:14,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498159158] [2021-06-05 23:38:14,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:38:14,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:14,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:38:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:38:14,875 INFO L87 Difference]: Start difference. First operand 66355 states and 200891 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:18,545 INFO L93 Difference]: Finished difference Result 94843 states and 285713 transitions. [2021-06-05 23:38:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:38:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:38:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:18,684 INFO L225 Difference]: With dead ends: 94843 [2021-06-05 23:38:18,684 INFO L226 Difference]: Without dead ends: 93226 [2021-06-05 23:38:18,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 2481.7ms TimeCoverageRelationStatistics Valid=1769, Invalid=7161, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:38:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93226 states. [2021-06-05 23:38:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93226 to 68214. [2021-06-05 23:38:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68214 states, 68213 states have (on average 3.0280151877208157) internal successors, (206550), 68213 states have internal predecessors, (206550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68214 states to 68214 states and 206550 transitions. [2021-06-05 23:38:19,930 INFO L78 Accepts]: Start accepts. Automaton has 68214 states and 206550 transitions. Word has length 56 [2021-06-05 23:38:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:19,930 INFO L482 AbstractCegarLoop]: Abstraction has 68214 states and 206550 transitions. [2021-06-05 23:38:19,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 68214 states and 206550 transitions. [2021-06-05 23:38:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:38:20,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:20,016 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:20,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:20,219 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash 130252379, now seen corresponding path program 42 times [2021-06-05 23:38:20,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:20,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387802214] [2021-06-05 23:38:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:38:20,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387802214] [2021-06-05 23:38:20,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387802214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310610061] [2021-06-05 23:38:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:20,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:38:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:38:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:21,241 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:38:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:38:21,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:21,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:21,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:21,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:38:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:21,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310610061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:21,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:21,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-05 23:38:21,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145275640] [2021-06-05 23:38:21,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:21,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:21,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:21,299 INFO L87 Difference]: Start difference. First operand 68214 states and 206550 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:24,378 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-06-05 23:38:36,729 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 23:38:36,885 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 23:38:37,038 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 23:38:37,888 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 23:38:38,598 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-05 23:38:41,217 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-05 23:38:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:42,518 INFO L93 Difference]: Finished difference Result 134363 states and 399183 transitions. [2021-06-05 23:38:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-05 23:38:42,518 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:38:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:42,736 INFO L225 Difference]: With dead ends: 134363 [2021-06-05 23:38:42,736 INFO L226 Difference]: Without dead ends: 132419 [2021-06-05 23:38:42,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39310 ImplicationChecksByTransitivity, 17339.9ms TimeCoverageRelationStatistics Valid=9025, Invalid=85531, Unknown=0, NotChecked=0, Total=94556 [2021-06-05 23:38:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132419 states. [2021-06-05 23:38:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132419 to 71888. [2021-06-05 23:38:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71888 states, 71887 states have (on average 3.0334831054293545) internal successors, (218068), 71887 states have internal predecessors, (218068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71888 states to 71888 states and 218068 transitions. [2021-06-05 23:38:44,578 INFO L78 Accepts]: Start accepts. Automaton has 71888 states and 218068 transitions. Word has length 56 [2021-06-05 23:38:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:44,578 INFO L482 AbstractCegarLoop]: Abstraction has 71888 states and 218068 transitions. [2021-06-05 23:38:44,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 71888 states and 218068 transitions. [2021-06-05 23:38:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:38:44,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:44,665 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:44,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:44,869 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1860816747, now seen corresponding path program 43 times [2021-06-05 23:38:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:44,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836226825] [2021-06-05 23:38:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:45,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:45,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836226825] [2021-06-05 23:38:45,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836226825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:45,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848363897] [2021-06-05 23:38:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:38:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 23:38:45,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:45,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:45,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:45,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-05 23:38:46,005 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_118, v_prenex_120, v_prenex_122], 1=[q3, v_prenex_124]} [2021-06-05 23:38:46,009 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 21 treesize of output 13 [2021-06-05 23:38:46,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,120 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 23:38:46,121 INFO L628 ElimStorePlain]: treesize reduction 60, result has 79.4 percent of original size [2021-06-05 23:38:46,121 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-05 23:38:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:38:46,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:46,179 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:38:46,179 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 [2021-06-05 23:38:46,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:46,229 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:38:46,229 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 [2021-06-05 23:38:46,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,297 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.1 percent of original size [2021-06-05 23:38:46,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:38:46,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:302, output treesize:133 [2021-06-05 23:38:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,414 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-06-05 23:38:46,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 24 [2021-06-05 23:38:46,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 23:38:46,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:46,439 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-06-05 23:38:46,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 23:38:46,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:46,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:38:46,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:157, output treesize:37 [2021-06-05 23:38:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:46,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848363897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:46,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:46,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 23:38:46,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155693034] [2021-06-05 23:38:46,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:38:46,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:46,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:38:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:38:46,564 INFO L87 Difference]: Start difference. First operand 71888 states and 218068 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,912 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-06-05 23:38:51,569 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 23:38:52,772 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 23:38:55,206 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 23:38:56,156 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 23:38:56,292 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 23:38:56,553 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2021-06-05 23:38:57,013 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2021-06-05 23:38:57,179 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 23:38:57,478 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 23:38:58,227 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 23:38:59,118 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 23:38:59,248 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 23:38:59,677 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 23:38:59,841 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 23:38:59,987 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 23:39:00,147 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 23:39:00,395 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 23:39:00,562 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 23:39:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:00,753 INFO L93 Difference]: Finished difference Result 137760 states and 413530 transitions. [2021-06-05 23:39:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 23:39:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:39:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:00,967 INFO L225 Difference]: With dead ends: 137760 [2021-06-05 23:39:00,968 INFO L226 Difference]: Without dead ends: 137606 [2021-06-05 23:39:00,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14412 ImplicationChecksByTransitivity, 10685.9ms TimeCoverageRelationStatistics Valid=7257, Invalid=27525, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 23:39:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137606 states. [2021-06-05 23:39:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137606 to 76981. [2021-06-05 23:39:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76981 states, 76980 states have (on average 3.0353988048843856) internal successors, (233665), 76980 states have internal predecessors, (233665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76981 states to 76981 states and 233665 transitions. [2021-06-05 23:39:02,757 INFO L78 Accepts]: Start accepts. Automaton has 76981 states and 233665 transitions. Word has length 56 [2021-06-05 23:39:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:02,758 INFO L482 AbstractCegarLoop]: Abstraction has 76981 states and 233665 transitions. [2021-06-05 23:39:02,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 76981 states and 233665 transitions. [2021-06-05 23:39:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:39:02,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:02,855 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:03,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:03,055 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -354012671, now seen corresponding path program 44 times [2021-06-05 23:39:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:03,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507287066] [2021-06-05 23:39:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 23:39:03,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:03,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507287066] [2021-06-05 23:39:03,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507287066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541068811] [2021-06-05 23:39:03,261 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:03,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:39:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:03,608 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 7 treesize of output 3 [2021-06-05 23:39:03,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:03,651 INFO L628 ElimStorePlain]: treesize reduction 38, result has 68.1 percent of original size [2021-06-05 23:39:03,651 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-05 23:39:03,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:03,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:79 [2021-06-05 23:39:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:03,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 23:39:03,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:03,769 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:39:03,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:39:03,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:03,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:03,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:03,780 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:26 [2021-06-05 23:39:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:39:03,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541068811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:03,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:03,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 23:39:03,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263153398] [2021-06-05 23:39:03,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:39:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:39:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:39:03,856 INFO L87 Difference]: Start difference. First operand 76981 states and 233665 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:07,094 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 23:39:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:17,085 INFO L93 Difference]: Finished difference Result 126205 states and 379875 transitions. [2021-06-05 23:39:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-06-05 23:39:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:39:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:17,303 INFO L225 Difference]: With dead ends: 126205 [2021-06-05 23:39:17,304 INFO L226 Difference]: Without dead ends: 125231 [2021-06-05 23:39:17,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14100 ImplicationChecksByTransitivity, 10896.6ms TimeCoverageRelationStatistics Valid=3688, Invalid=31844, Unknown=0, NotChecked=0, Total=35532 [2021-06-05 23:39:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125231 states. [2021-06-05 23:39:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125231 to 78489. [2021-06-05 23:39:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78489 states, 78488 states have (on average 3.035113647946183) internal successors, (238220), 78488 states have internal predecessors, (238220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78489 states to 78489 states and 238220 transitions. [2021-06-05 23:39:19,363 INFO L78 Accepts]: Start accepts. Automaton has 78489 states and 238220 transitions. Word has length 56 [2021-06-05 23:39:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:19,364 INFO L482 AbstractCegarLoop]: Abstraction has 78489 states and 238220 transitions. [2021-06-05 23:39:19,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 78489 states and 238220 transitions. [2021-06-05 23:39:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:39:19,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:19,470 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:19,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 23:39:19,671 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2050799049, now seen corresponding path program 45 times [2021-06-05 23:39:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:19,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929579531] [2021-06-05 23:39:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:39:19,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:19,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929579531] [2021-06-05 23:39:19,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929579531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:19,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440819518] [2021-06-05 23:39:19,921 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:19,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:39:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:39:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:20,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:39:20,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:20,394 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:39:20,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:39:20,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:20,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:20,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:20,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-05 23:39:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:39:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440819518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:20,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:20,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 23:39:20,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068258856] [2021-06-05 23:39:20,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:39:20,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:39:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:39:20,512 INFO L87 Difference]: Start difference. First operand 78489 states and 238220 transitions. Second operand has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:22,075 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 23:39:27,850 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-05 23:39:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:35,297 INFO L93 Difference]: Finished difference Result 150163 states and 450831 transitions. [2021-06-05 23:39:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 23:39:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:39:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:35,582 INFO L225 Difference]: With dead ends: 150163 [2021-06-05 23:39:35,582 INFO L226 Difference]: Without dead ends: 149303 [2021-06-05 23:39:35,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30461 ImplicationChecksByTransitivity, 12281.2ms TimeCoverageRelationStatistics Valid=7924, Invalid=61508, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 23:39:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149303 states. [2021-06-05 23:39:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149303 to 76775. [2021-06-05 23:39:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76775 states, 76774 states have (on average 3.0367572355224426) internal successors, (233144), 76774 states have internal predecessors, (233144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76775 states to 76775 states and 233144 transitions. [2021-06-05 23:39:37,673 INFO L78 Accepts]: Start accepts. Automaton has 76775 states and 233144 transitions. Word has length 56 [2021-06-05 23:39:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:37,673 INFO L482 AbstractCegarLoop]: Abstraction has 76775 states and 233144 transitions. [2021-06-05 23:39:37,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:37,673 INFO L276 IsEmpty]: Start isEmpty. Operand 76775 states and 233144 transitions. [2021-06-05 23:39:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:39:37,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:37,774 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:37,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 23:39:37,975 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1706619151, now seen corresponding path program 46 times [2021-06-05 23:39:37,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:37,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18728999] [2021-06-05 23:39:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:39:38,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:38,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18728999] [2021-06-05 23:39:38,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18728999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:38,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871959890] [2021-06-05 23:39:38,165 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:38,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:39:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:38,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:39:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:38,351 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 21 treesize of output 13 [2021-06-05 23:39:38,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:38,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-06-05 23:39:38,633 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_128], 10=[q1]} [2021-06-05 23:39:38,636 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 21 treesize of output 13 [2021-06-05 23:39:38,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:38,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:39:38,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,679 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 21 treesize of output 13 [2021-06-05 23:39:38,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:39:38,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:38,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 23:39:38,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,741 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 23:39:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:39:38,742 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:38,759 INFO L628 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 23:39:38,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:38,760 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:167, output treesize:23 [2021-06-05 23:39:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 23:39:38,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871959890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:38,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:38,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 23:39:38,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787481843] [2021-06-05 23:39:38,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:39:38,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:38,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:39:38,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:39:38,828 INFO L87 Difference]: Start difference. First operand 76775 states and 233144 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:39,302 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-06-05 23:39:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:42,352 INFO L93 Difference]: Finished difference Result 187074 states and 565734 transitions. [2021-06-05 23:39:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:39:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:39:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:42,652 INFO L225 Difference]: With dead ends: 187074 [2021-06-05 23:39:42,652 INFO L226 Difference]: Without dead ends: 180481 [2021-06-05 23:39:42,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2264.0ms TimeCoverageRelationStatistics Valid=962, Invalid=5518, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:39:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180481 states. [2021-06-05 23:39:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180481 to 85464. [2021-06-05 23:39:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85464 states, 85463 states have (on average 3.0405087581760526) internal successors, (259851), 85463 states have internal predecessors, (259851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85464 states to 85464 states and 259851 transitions. [2021-06-05 23:39:45,040 INFO L78 Accepts]: Start accepts. Automaton has 85464 states and 259851 transitions. Word has length 56 [2021-06-05 23:39:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:45,040 INFO L482 AbstractCegarLoop]: Abstraction has 85464 states and 259851 transitions. [2021-06-05 23:39:45,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 85464 states and 259851 transitions. [2021-06-05 23:39:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:39:45,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:45,154 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:45,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 23:39:45,355 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:45,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1216084717, now seen corresponding path program 47 times [2021-06-05 23:39:45,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:45,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274800024] [2021-06-05 23:39:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:39:45,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274800024] [2021-06-05 23:39:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274800024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917592981] [2021-06-05 23:39:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:45,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:39:45,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:45,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:39:45,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:39:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917592981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:46,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:46,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 28 [2021-06-05 23:39:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559118204] [2021-06-05 23:39:46,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:39:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:39:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:39:46,202 INFO L87 Difference]: Start difference. First operand 85464 states and 259851 transitions. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:50,010 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 23:39:53,045 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 23:39:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:54,003 INFO L93 Difference]: Finished difference Result 108109 states and 325709 transitions. [2021-06-05 23:39:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:39:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:39:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:54,206 INFO L225 Difference]: With dead ends: 108109 [2021-06-05 23:39:54,206 INFO L226 Difference]: Without dead ends: 107962 [2021-06-05 23:39:54,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 5607.6ms TimeCoverageRelationStatistics Valid=1509, Invalid=12063, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 23:39:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107962 states. [2021-06-05 23:39:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107962 to 85866. [2021-06-05 23:39:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85866 states, 85865 states have (on average 3.0404006288941945) internal successors, (261064), 85865 states have internal predecessors, (261064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85866 states to 85866 states and 261064 transitions. [2021-06-05 23:39:55,895 INFO L78 Accepts]: Start accepts. Automaton has 85866 states and 261064 transitions. Word has length 56 [2021-06-05 23:39:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:55,895 INFO L482 AbstractCegarLoop]: Abstraction has 85866 states and 261064 transitions. [2021-06-05 23:39:55,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 85866 states and 261064 transitions. [2021-06-05 23:39:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:39:56,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:56,523 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:56,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 23:39:56,741 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:56,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2060786477, now seen corresponding path program 48 times [2021-06-05 23:39:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:56,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35867376] [2021-06-05 23:39:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:39:56,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:56,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35867376] [2021-06-05 23:39:56,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35867376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:56,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881432775] [2021-06-05 23:39:56,923 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:56,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:39:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:39:56,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:57,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:39:57,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:57,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:39:57,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:57,431 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:39:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:39:57,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:57,442 INFO L628 ElimStorePlain]: treesize reduction 9, result has 59.1 percent of original size [2021-06-05 23:39:57,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:57,442 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:13 [2021-06-05 23:39:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:57,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881432775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:57,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:57,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 23:39:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925970389] [2021-06-05 23:39:57,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:39:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:39:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:39:57,532 INFO L87 Difference]: Start difference. First operand 85866 states and 261064 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:05,652 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 23:40:08,673 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 23:40:11,757 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 23:40:14,723 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 23:40:17,171 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 23:40:19,415 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 23:40:24,845 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 23:40:25,978 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 23:40:33,487 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 23:40:43,426 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-05 23:40:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:43,980 INFO L93 Difference]: Finished difference Result 234053 states and 701084 transitions. [2021-06-05 23:40:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 645 states. [2021-06-05 23:40:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:40:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:44,412 INFO L225 Difference]: With dead ends: 234053 [2021-06-05 23:40:44,413 INFO L226 Difference]: Without dead ends: 232120 [2021-06-05 23:40:44,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208569 ImplicationChecksByTransitivity, 41888.6ms TimeCoverageRelationStatistics Valid=33140, Invalid=399166, Unknown=0, NotChecked=0, Total=432306 [2021-06-05 23:40:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232120 states. [2021-06-05 23:40:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232120 to 82891. [2021-06-05 23:40:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82891 states, 82890 states have (on average 3.0376161177464107) internal successors, (251788), 82890 states have internal predecessors, (251788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82891 states to 82891 states and 251788 transitions. [2021-06-05 23:40:47,149 INFO L78 Accepts]: Start accepts. Automaton has 82891 states and 251788 transitions. Word has length 56 [2021-06-05 23:40:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:47,149 INFO L482 AbstractCegarLoop]: Abstraction has 82891 states and 251788 transitions. [2021-06-05 23:40:47,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 82891 states and 251788 transitions. [2021-06-05 23:40:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:40:47,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:47,274 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:47,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:47,474 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1445569459, now seen corresponding path program 49 times [2021-06-05 23:40:47,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:47,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333864446] [2021-06-05 23:40:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:40:47,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333864446] [2021-06-05 23:40:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333864446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768172625] [2021-06-05 23:40:47,725 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:47,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:40:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:48,014 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:40:48,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:40:48,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:48,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:48,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:48,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:40:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:48,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768172625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:48,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:48,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 27 [2021-06-05 23:40:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620445594] [2021-06-05 23:40:48,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:40:48,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:40:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:40:48,070 INFO L87 Difference]: Start difference. First operand 82891 states and 251788 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:57,709 INFO L93 Difference]: Finished difference Result 151382 states and 454698 transitions. [2021-06-05 23:40:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 23:40:57,710 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:40:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:57,951 INFO L225 Difference]: With dead ends: 151382 [2021-06-05 23:40:57,951 INFO L226 Difference]: Without dead ends: 150425 [2021-06-05 23:40:57,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13541 ImplicationChecksByTransitivity, 6683.8ms TimeCoverageRelationStatistics Valid=5693, Invalid=27613, Unknown=0, NotChecked=0, Total=33306 [2021-06-05 23:40:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150425 states. [2021-06-05 23:40:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150425 to 88356. [2021-06-05 23:40:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88356 states, 88355 states have (on average 3.0369645181370606) internal successors, (268331), 88355 states have internal predecessors, (268331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88356 states to 88356 states and 268331 transitions. [2021-06-05 23:40:59,829 INFO L78 Accepts]: Start accepts. Automaton has 88356 states and 268331 transitions. Word has length 56 [2021-06-05 23:40:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 88356 states and 268331 transitions. [2021-06-05 23:40:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 88356 states and 268331 transitions. [2021-06-05 23:41:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:41:00,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:00,399 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:00,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:00,613 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1007702601, now seen corresponding path program 50 times [2021-06-05 23:41:00,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:00,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928250731] [2021-06-05 23:41:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:00,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:00,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928250731] [2021-06-05 23:41:00,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928250731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:00,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906626910] [2021-06-05 23:41:00,898 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:00,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:00,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:41:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:01,265 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_131], 1=[v_prenex_129]} [2021-06-05 23:41:01,269 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 9 treesize of output 7 [2021-06-05 23:41:01,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:01,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:01,311 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 7 treesize of output 3 [2021-06-05 23:41:01,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:01,371 INFO L628 ElimStorePlain]: treesize reduction 33, result has 79.0 percent of original size [2021-06-05 23:41:01,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:41:01,375 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 13 treesize of output 7 [2021-06-05 23:41:01,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:01,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:01,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:41:01,404 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:173, output treesize:107 [2021-06-05 23:41:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:41:01,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:01,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 23:41:01,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:01,492 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:41:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:41:01,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:01,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:01,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:41:01,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:38 [2021-06-05 23:41:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:01,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906626910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:01,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:01,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:41:01,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067919128] [2021-06-05 23:41:01,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:41:01,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:01,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:41:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:41:01,622 INFO L87 Difference]: Start difference. First operand 88356 states and 268331 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:10,185 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 23:41:11,598 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 23:41:11,772 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 23:41:12,338 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 23:41:12,571 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 23:41:12,717 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 23:41:13,430 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 23:41:14,026 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 23:41:14,495 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 23:41:15,724 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 23:41:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:16,269 INFO L93 Difference]: Finished difference Result 179810 states and 539423 transitions. [2021-06-05 23:41:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-06-05 23:41:16,270 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:41:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:16,590 INFO L225 Difference]: With dead ends: 179810 [2021-06-05 23:41:16,590 INFO L226 Difference]: Without dead ends: 177585 [2021-06-05 23:41:16,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22215 ImplicationChecksByTransitivity, 11751.1ms TimeCoverageRelationStatistics Valid=8379, Invalid=41573, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 23:41:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177585 states. [2021-06-05 23:41:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177585 to 89177. [2021-06-05 23:41:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89177 states, 89176 states have (on average 3.035973804611106) internal successors, (270736), 89176 states have internal predecessors, (270736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89177 states to 89177 states and 270736 transitions. [2021-06-05 23:41:19,101 INFO L78 Accepts]: Start accepts. Automaton has 89177 states and 270736 transitions. Word has length 56 [2021-06-05 23:41:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:19,101 INFO L482 AbstractCegarLoop]: Abstraction has 89177 states and 270736 transitions. [2021-06-05 23:41:19,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 89177 states and 270736 transitions. [2021-06-05 23:41:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:41:19,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:19,237 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:19,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 23:41:19,438 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash 976675011, now seen corresponding path program 51 times [2021-06-05 23:41:19,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:19,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399978242] [2021-06-05 23:41:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:19,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:19,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399978242] [2021-06-05 23:41:19,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399978242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:19,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601934793] [2021-06-05 23:41:19,562 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:19,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:41:19,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:41:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-05 23:41:20,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:20,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:41:20,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:20,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:20,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:20,116 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:13 [2021-06-05 23:41:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:20,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601934793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:20,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:20,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 23:41:20,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992555663] [2021-06-05 23:41:20,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:20,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:20,174 INFO L87 Difference]: Start difference. First operand 89177 states and 270736 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:20,984 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 23:41:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:23,581 INFO L93 Difference]: Finished difference Result 170857 states and 514759 transitions. [2021-06-05 23:41:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:41:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:41:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:23,853 INFO L225 Difference]: With dead ends: 170857 [2021-06-05 23:41:23,853 INFO L226 Difference]: Without dead ends: 170857 [2021-06-05 23:41:23,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 2243.5ms TimeCoverageRelationStatistics Valid=835, Invalid=3325, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:41:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170857 states. [2021-06-05 23:41:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170857 to 87664. [2021-06-05 23:41:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87664 states, 87663 states have (on average 3.0358760252329944) internal successors, (266134), 87663 states have internal predecessors, (266134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87664 states to 87664 states and 266134 transitions. [2021-06-05 23:41:26,371 INFO L78 Accepts]: Start accepts. Automaton has 87664 states and 266134 transitions. Word has length 56 [2021-06-05 23:41:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:26,372 INFO L482 AbstractCegarLoop]: Abstraction has 87664 states and 266134 transitions. [2021-06-05 23:41:26,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 87664 states and 266134 transitions. [2021-06-05 23:41:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:41:26,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:26,535 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:26,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 23:41:26,736 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1653801429, now seen corresponding path program 52 times [2021-06-05 23:41:26,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:26,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763735942] [2021-06-05 23:41:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:27,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763735942] [2021-06-05 23:41:27,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763735942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:27,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169463725] [2021-06-05 23:41:27,051 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:27,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:41:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:27,188 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 21 treesize of output 13 [2021-06-05 23:41:27,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:27,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-06-05 23:41:27,730 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_136], 1=[q3], 6=[q1, v_prenex_135]} [2021-06-05 23:41:27,733 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 17 treesize of output 13 [2021-06-05 23:41:27,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:27,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:41:27,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,783 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 21 treesize of output 13 [2021-06-05 23:41:27,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:27,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:41:27,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,827 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:41:27,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:41:27,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:27,852 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-05 23:41:27,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-05 23:41:27,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:41:27,852 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-05 23:41:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169463725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:27,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:27,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-06-05 23:41:27,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802507662] [2021-06-05 23:41:27,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:41:27,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:27,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:41:27,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:41:27,905 INFO L87 Difference]: Start difference. First operand 87664 states and 266134 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:28,929 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 23:41:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:32,365 INFO L93 Difference]: Finished difference Result 110407 states and 332507 transitions. [2021-06-05 23:41:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:41:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:41:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:32,546 INFO L225 Difference]: With dead ends: 110407 [2021-06-05 23:41:32,546 INFO L226 Difference]: Without dead ends: 106033 [2021-06-05 23:41:32,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 3537.6ms TimeCoverageRelationStatistics Valid=1220, Invalid=6612, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:41:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106033 states. [2021-06-05 23:41:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106033 to 87561. [2021-06-05 23:41:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87561 states, 87560 states have (on average 3.035975331201462) internal successors, (265830), 87560 states have internal predecessors, (265830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87561 states to 87561 states and 265830 transitions. [2021-06-05 23:41:34,182 INFO L78 Accepts]: Start accepts. Automaton has 87561 states and 265830 transitions. Word has length 56 [2021-06-05 23:41:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:34,182 INFO L482 AbstractCegarLoop]: Abstraction has 87561 states and 265830 transitions. [2021-06-05 23:41:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 87561 states and 265830 transitions. [2021-06-05 23:41:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:41:34,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:34,305 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:34,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 23:41:34,506 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1999547327, now seen corresponding path program 53 times [2021-06-05 23:41:34,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:34,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337445075] [2021-06-05 23:41:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:34,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:34,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337445075] [2021-06-05 23:41:34,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337445075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:34,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163989128] [2021-06-05 23:41:34,754 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:34,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:41:34,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:41:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:35,385 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 23:41:35,431 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 17 treesize of output 13 [2021-06-05 23:41:35,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:35,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:35,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:35,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:41:35,975 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_141, v_prenex_144], 1=[q3], 3=[q1], 6=[v_prenex_145, v_prenex_139]} [2021-06-05 23:41:35,979 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 17 treesize of output 13 [2021-06-05 23:41:35,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:36,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:36,032 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 21 treesize of output 13 [2021-06-05 23:41:36,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:36,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:36,080 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:41:36,080 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 15 [2021-06-05 23:41:36,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:36,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:36,117 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:41:36,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:41:36,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:36,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:36,151 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:41:36,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 23:41:36,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:36,177 INFO L628 ElimStorePlain]: treesize reduction 44, result has 43.6 percent of original size [2021-06-05 23:41:36,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-05 23:41:36,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:41:36,178 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:171, output treesize:32 [2021-06-05 23:41:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:36,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163989128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:36,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:36,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 23:41:36,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548594406] [2021-06-05 23:41:36,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:41:36,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:41:36,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:41:36,228 INFO L87 Difference]: Start difference. First operand 87561 states and 265830 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:38,139 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 23:41:41,313 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 23:41:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:48,549 INFO L93 Difference]: Finished difference Result 113607 states and 341052 transitions. [2021-06-05 23:41:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-06-05 23:41:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:41:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:48,725 INFO L225 Difference]: With dead ends: 113607 [2021-06-05 23:41:48,726 INFO L226 Difference]: Without dead ends: 110336 [2021-06-05 23:41:48,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13401 ImplicationChecksByTransitivity, 11045.5ms TimeCoverageRelationStatistics Valid=5692, Invalid=29090, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 23:41:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110336 states. [2021-06-05 23:41:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110336 to 88209. [2021-06-05 23:41:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88209 states, 88208 states have (on average 3.0359604571013965) internal successors, (267796), 88208 states have internal predecessors, (267796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88209 states to 88209 states and 267796 transitions. [2021-06-05 23:41:50,719 INFO L78 Accepts]: Start accepts. Automaton has 88209 states and 267796 transitions. Word has length 56 [2021-06-05 23:41:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:50,719 INFO L482 AbstractCegarLoop]: Abstraction has 88209 states and 267796 transitions. [2021-06-05 23:41:50,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 88209 states and 267796 transitions. [2021-06-05 23:41:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:41:50,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:50,833 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:51,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:51,034 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1303598751, now seen corresponding path program 54 times [2021-06-05 23:41:51,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:51,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447760106] [2021-06-05 23:41:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:51,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:51,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447760106] [2021-06-05 23:41:51,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447760106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:51,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047040065] [2021-06-05 23:41:51,663 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:51,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:41:51,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:41:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:52,146 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:41:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:41:52,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:52,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:52,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:52,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:41:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:52,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047040065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:52,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:52,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2021-06-05 23:41:52,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92837668] [2021-06-05 23:41:52,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:41:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:52,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:41:52,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:41:52,197 INFO L87 Difference]: Start difference. First operand 88209 states and 267796 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,236 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-06-05 23:41:55,447 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 23:41:56,409 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:41:59,709 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-05 23:42:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:07,620 INFO L93 Difference]: Finished difference Result 175451 states and 525686 transitions. [2021-06-05 23:42:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-06-05 23:42:07,621 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:42:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:08,156 INFO L225 Difference]: With dead ends: 175451 [2021-06-05 23:42:08,156 INFO L226 Difference]: Without dead ends: 175273 [2021-06-05 23:42:08,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16017 ImplicationChecksByTransitivity, 11196.7ms TimeCoverageRelationStatistics Valid=4864, Invalid=36956, Unknown=0, NotChecked=0, Total=41820 [2021-06-05 23:42:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175273 states. [2021-06-05 23:42:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175273 to 100237. [2021-06-05 23:42:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100237 states, 100236 states have (on average 3.030657647950836) internal successors, (303781), 100236 states have internal predecessors, (303781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100237 states to 100237 states and 303781 transitions. [2021-06-05 23:42:10,442 INFO L78 Accepts]: Start accepts. Automaton has 100237 states and 303781 transitions. Word has length 56 [2021-06-05 23:42:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:10,442 INFO L482 AbstractCegarLoop]: Abstraction has 100237 states and 303781 transitions. [2021-06-05 23:42:10,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 100237 states and 303781 transitions. [2021-06-05 23:42:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:42:11,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:11,080 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:11,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 23:42:11,287 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:11,288 INFO L82 PathProgramCache]: Analyzing trace with hash -950109753, now seen corresponding path program 55 times [2021-06-05 23:42:11,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:11,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413182620] [2021-06-05 23:42:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:11,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:11,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413182620] [2021-06-05 23:42:11,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413182620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:11,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685880450] [2021-06-05 23:42:11,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:42:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:12,856 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 23:42:13,015 INFO L446 ElimStorePlain]: Different costs {1=[q3], 3=[q1], 6=[v_prenex_151], 10=[v_prenex_149]} [2021-06-05 23:42:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:13,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 23:42:13,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:13,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 23:42:13,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:13,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:42:13,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:13,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:42:13,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,047 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:42:13,047 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 [2021-06-05 23:42:13,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,144 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:42:13,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2021-06-05 23:42:13,145 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,277 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-05 23:42:13,278 INFO L628 ElimStorePlain]: treesize reduction 73, result has 78.8 percent of original size [2021-06-05 23:42:13,283 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:42:13,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 31 [2021-06-05 23:42:13,285 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,362 INFO L628 ElimStorePlain]: treesize reduction 77, result has 67.0 percent of original size [2021-06-05 23:42:13,367 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:42:13,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 34 [2021-06-05 23:42:13,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:42:13,396 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:483, output treesize:110 [2021-06-05 23:42:13,917 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:42:13,917 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 [2021-06-05 23:42:13,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,937 INFO L628 ElimStorePlain]: treesize reduction 26, result has 59.4 percent of original size [2021-06-05 23:42:13,937 INFO L518 ElimStorePlain]: Eliminatee v_prenex_153 vanished before elimination [2021-06-05 23:42:13,939 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:42:13,939 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 14 [2021-06-05 23:42:13,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:13,945 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:90, output treesize:10 [2021-06-05 23:42:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:13,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685880450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:13,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:13,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-05 23:42:13,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121022022] [2021-06-05 23:42:13,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:42:13,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:13,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:42:13,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:42:13,986 INFO L87 Difference]: Start difference. First operand 100237 states and 303781 transitions. Second operand has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,933 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-05 23:42:16,662 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 23:42:17,029 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 23:42:17,748 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 23:42:18,131 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-05 23:42:20,272 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 23:42:20,435 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 23:42:20,637 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 23:42:21,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-05 23:42:21,893 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 23:42:22,178 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 23:42:22,492 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-05 23:42:22,638 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 23:42:23,071 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-06-05 23:42:23,777 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-05 23:42:24,350 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2021-06-05 23:42:25,328 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-06-05 23:42:25,513 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-05 23:42:25,864 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-05 23:42:26,417 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 23:42:26,659 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 23:42:26,849 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-06-05 23:42:27,342 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 23:42:27,809 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2021-06-05 23:42:28,130 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 23:42:28,318 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 23:42:28,510 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-05 23:42:28,704 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-05 23:42:29,264 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2021-06-05 23:42:29,735 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 23:42:29,981 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-05 23:42:30,152 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-05 23:42:30,331 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2021-06-05 23:42:31,053 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 23:42:31,750 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 23:42:32,375 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 23:42:32,671 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 23:42:32,945 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 23:42:33,424 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 23:42:33,655 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 23:42:33,884 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 23:42:35,623 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 23:42:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:36,499 INFO L93 Difference]: Finished difference Result 195565 states and 584802 transitions. [2021-06-05 23:42:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-05 23:42:36,500 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:42:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:36,834 INFO L225 Difference]: With dead ends: 195565 [2021-06-05 23:42:36,834 INFO L226 Difference]: Without dead ends: 194276 [2021-06-05 23:42:36,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29871 ImplicationChecksByTransitivity, 19273.0ms TimeCoverageRelationStatistics Valid=8710, Invalid=59150, Unknown=0, NotChecked=0, Total=67860 [2021-06-05 23:42:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194276 states. [2021-06-05 23:42:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194276 to 100992. [2021-06-05 23:42:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100992 states, 100991 states have (on average 3.030626491469537) internal successors, (306066), 100991 states have internal predecessors, (306066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100992 states to 100992 states and 306066 transitions. [2021-06-05 23:42:39,674 INFO L78 Accepts]: Start accepts. Automaton has 100992 states and 306066 transitions. Word has length 56 [2021-06-05 23:42:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:39,674 INFO L482 AbstractCegarLoop]: Abstraction has 100992 states and 306066 transitions. [2021-06-05 23:42:39,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 100992 states and 306066 transitions. [2021-06-05 23:42:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:42:39,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:39,834 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:40,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 23:42:40,034 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2083983041, now seen corresponding path program 56 times [2021-06-05 23:42:40,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:40,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619058901] [2021-06-05 23:42:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:40,982 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-06-05 23:42:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:41,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619058901] [2021-06-05 23:42:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619058901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492894442] [2021-06-05 23:42:41,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:41,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:41,650 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_161], 1=[v_prenex_163, v_prenex_157], 3=[v_prenex_159]} [2021-06-05 23:42:41,654 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 9 treesize of output 7 [2021-06-05 23:42:41,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:41,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:41,727 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 7 treesize of output 3 [2021-06-05 23:42:41,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:41,842 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-05 23:42:41,842 INFO L628 ElimStorePlain]: treesize reduction 40, result has 85.3 percent of original size [2021-06-05 23:42:41,847 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:42:41,848 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 13 treesize of output 5 [2021-06-05 23:42:41,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:41,935 INFO L628 ElimStorePlain]: treesize reduction 46, result has 79.1 percent of original size [2021-06-05 23:42:41,935 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 23:42:41,939 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:42:41,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-05 23:42:41,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:41,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:41,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:42:41,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:289, output treesize:150 [2021-06-05 23:42:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 23:42:42,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:42:42,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,085 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:42:42,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:42:42,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:42,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:42:42,100 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:38 [2021-06-05 23:42:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:42,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492894442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:42,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:42,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2021-06-05 23:42:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336542829] [2021-06-05 23:42:42,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:42:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:42:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:42:42,209 INFO L87 Difference]: Start difference. First operand 100992 states and 306066 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:44,520 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 23:42:46,213 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 23:42:46,397 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 23:42:46,532 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 23:42:46,744 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 23:42:47,602 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 23:42:47,967 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 23:42:48,894 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 23:42:49,247 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 23:42:49,589 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-05 23:42:50,009 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 23:42:50,241 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 23:42:50,715 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2021-06-05 23:42:51,003 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 23:42:51,288 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 23:42:51,870 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-06-05 23:42:52,876 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-05 23:42:53,022 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 23:42:53,871 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-05 23:42:54,017 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 23:42:55,007 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 23:42:55,253 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 23:42:55,676 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 23:42:56,358 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 23:42:57,435 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-05 23:42:59,444 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 23:42:59,664 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 23:43:00,624 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 23:43:01,588 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 23:43:01,994 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-06-05 23:43:02,342 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-05 23:43:02,598 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 23:43:03,497 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-05 23:43:03,754 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-05 23:43:04,117 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-06-05 23:43:04,313 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-05 23:43:04,969 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 23:43:05,456 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 23:43:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:06,789 INFO L93 Difference]: Finished difference Result 153664 states and 460251 transitions. [2021-06-05 23:43:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-06-05 23:43:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:43:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:07,037 INFO L225 Difference]: With dead ends: 153664 [2021-06-05 23:43:07,037 INFO L226 Difference]: Without dead ends: 153513 [2021-06-05 23:43:07,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39684 ImplicationChecksByTransitivity, 22317.1ms TimeCoverageRelationStatistics Valid=9396, Invalid=82716, Unknown=0, NotChecked=0, Total=92112 [2021-06-05 23:43:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153513 states. [2021-06-05 23:43:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153513 to 101262. [2021-06-05 23:43:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101262 states, 101261 states have (on average 3.0316706333139116) internal successors, (306990), 101261 states have internal predecessors, (306990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101262 states to 101262 states and 306990 transitions. [2021-06-05 23:43:09,415 INFO L78 Accepts]: Start accepts. Automaton has 101262 states and 306990 transitions. Word has length 56 [2021-06-05 23:43:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:09,415 INFO L482 AbstractCegarLoop]: Abstraction has 101262 states and 306990 transitions. [2021-06-05 23:43:09,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 101262 states and 306990 transitions. [2021-06-05 23:43:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:43:09,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:09,573 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:09,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:09,774 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash 841396681, now seen corresponding path program 57 times [2021-06-05 23:43:09,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:09,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082365688] [2021-06-05 23:43:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 23:43:09,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:09,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082365688] [2021-06-05 23:43:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082365688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:09,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667424071] [2021-06-05 23:43:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:10,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:43:10,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:43:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:10,144 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:43:10,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:43:10,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:10,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:10,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:10,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:43:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 23:43:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667424071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:10,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:10,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2021-06-05 23:43:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773256139] [2021-06-05 23:43:10,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:10,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:10,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:10,191 INFO L87 Difference]: Start difference. First operand 101262 states and 306990 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:11,191 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-06-05 23:43:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:23,798 INFO L93 Difference]: Finished difference Result 280650 states and 841868 transitions. [2021-06-05 23:43:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-06-05 23:43:23,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:43:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:24,314 INFO L225 Difference]: With dead ends: 280650 [2021-06-05 23:43:24,314 INFO L226 Difference]: Without dead ends: 279584 [2021-06-05 23:43:24,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42473 ImplicationChecksByTransitivity, 9933.8ms TimeCoverageRelationStatistics Valid=10285, Invalid=84271, Unknown=0, NotChecked=0, Total=94556 [2021-06-05 23:43:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279584 states. [2021-06-05 23:43:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279584 to 108104. [2021-06-05 23:43:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108104 states, 108103 states have (on average 3.028750358454437) internal successors, (327417), 108103 states have internal predecessors, (327417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108104 states to 108104 states and 327417 transitions. [2021-06-05 23:43:28,066 INFO L78 Accepts]: Start accepts. Automaton has 108104 states and 327417 transitions. Word has length 58 [2021-06-05 23:43:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:28,066 INFO L482 AbstractCegarLoop]: Abstraction has 108104 states and 327417 transitions. [2021-06-05 23:43:28,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 108104 states and 327417 transitions. [2021-06-05 23:43:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:43:28,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:28,241 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:28,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:28,443 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1222967297, now seen corresponding path program 58 times [2021-06-05 23:43:28,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:28,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327496186] [2021-06-05 23:43:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 23:43:28,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:28,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327496186] [2021-06-05 23:43:28,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327496186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:28,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149902145] [2021-06-05 23:43:28,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:28,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:43:28,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:28,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:28,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:28,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 23:43:28,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:28,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:28,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:28,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-05 23:43:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 23:43:28,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149902145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:28,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:28,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:43:28,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313203062] [2021-06-05 23:43:28,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:43:28,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:28,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:43:28,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:43:28,836 INFO L87 Difference]: Start difference. First operand 108104 states and 327417 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:30,214 INFO L93 Difference]: Finished difference Result 146539 states and 441815 transitions. [2021-06-05 23:43:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:43:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:43:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:30,481 INFO L225 Difference]: With dead ends: 146539 [2021-06-05 23:43:30,481 INFO L226 Difference]: Without dead ends: 146539 [2021-06-05 23:43:30,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:43:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146539 states. [2021-06-05 23:43:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146539 to 107384. [2021-06-05 23:43:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107384 states, 107383 states have (on average 3.028775504502575) internal successors, (325239), 107383 states have internal predecessors, (325239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107384 states to 107384 states and 325239 transitions. [2021-06-05 23:43:32,517 INFO L78 Accepts]: Start accepts. Automaton has 107384 states and 325239 transitions. Word has length 58 [2021-06-05 23:43:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:32,518 INFO L482 AbstractCegarLoop]: Abstraction has 107384 states and 325239 transitions. [2021-06-05 23:43:32,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 107384 states and 325239 transitions. [2021-06-05 23:43:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:43:33,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:33,206 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:33,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:33,441 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1895291265, now seen corresponding path program 59 times [2021-06-05 23:43:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:33,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437821897] [2021-06-05 23:43:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:43:33,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:33,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437821897] [2021-06-05 23:43:33,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437821897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212585431] [2021-06-05 23:43:33,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:33,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:43:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:43:33,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:33,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:33,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 23:43:33,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-05 23:43:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:43:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212585431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:33,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:43:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541678410] [2021-06-05 23:43:33,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:43:33,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:43:33,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:43:33,889 INFO L87 Difference]: Start difference. First operand 107384 states and 325239 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:34,977 INFO L93 Difference]: Finished difference Result 163977 states and 495737 transitions. [2021-06-05 23:43:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:43:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:43:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:35,716 INFO L225 Difference]: With dead ends: 163977 [2021-06-05 23:43:35,717 INFO L226 Difference]: Without dead ends: 163977 [2021-06-05 23:43:35,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:43:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163977 states. [2021-06-05 23:43:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163977 to 111759. [2021-06-05 23:43:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111759 states, 111758 states have (on average 3.0281769537751213) internal successors, (338423), 111758 states have internal predecessors, (338423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111759 states to 111759 states and 338423 transitions. [2021-06-05 23:43:37,950 INFO L78 Accepts]: Start accepts. Automaton has 111759 states and 338423 transitions. Word has length 58 [2021-06-05 23:43:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:37,951 INFO L482 AbstractCegarLoop]: Abstraction has 111759 states and 338423 transitions. [2021-06-05 23:43:37,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:37,951 INFO L276 IsEmpty]: Start isEmpty. Operand 111759 states and 338423 transitions. [2021-06-05 23:43:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:43:38,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:38,600 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:38,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 23:43:38,815 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1075319171, now seen corresponding path program 60 times [2021-06-05 23:43:38,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:38,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003822487] [2021-06-05 23:43:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:39,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003822487] [2021-06-05 23:43:39,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003822487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772876703] [2021-06-05 23:43:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:39,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:43:39,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:39,874 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:43:39,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:43:39,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:39,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:39,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:39,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-05 23:43:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:39,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:43:39,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:39,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:39,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:39,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:43:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:43:40,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772876703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:40,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:40,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 42 [2021-06-05 23:43:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214304114] [2021-06-05 23:43:40,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:43:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:43:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:43:40,003 INFO L87 Difference]: Start difference. First operand 111759 states and 338423 transitions. Second operand has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:59,224 INFO L93 Difference]: Finished difference Result 264126 states and 795381 transitions. [2021-06-05 23:43:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-06-05 23:43:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:43:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:00,074 INFO L225 Difference]: With dead ends: 264126 [2021-06-05 23:44:00,074 INFO L226 Difference]: Without dead ends: 263139 [2021-06-05 23:44:00,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53310 ImplicationChecksByTransitivity, 16466.2ms TimeCoverageRelationStatistics Valid=13949, Invalid=101991, Unknown=0, NotChecked=0, Total=115940 [2021-06-05 23:44:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263139 states. [2021-06-05 23:44:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263139 to 121290. [2021-06-05 23:44:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121290 states, 121289 states have (on average 3.028906166264047) internal successors, (367373), 121289 states have internal predecessors, (367373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121290 states to 121290 states and 367373 transitions. [2021-06-05 23:44:03,304 INFO L78 Accepts]: Start accepts. Automaton has 121290 states and 367373 transitions. Word has length 58 [2021-06-05 23:44:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:03,304 INFO L482 AbstractCegarLoop]: Abstraction has 121290 states and 367373 transitions. [2021-06-05 23:44:03,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 121290 states and 367373 transitions. [2021-06-05 23:44:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:44:03,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:03,497 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:03,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:03,699 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:03,699 INFO L82 PathProgramCache]: Analyzing trace with hash -321303673, now seen corresponding path program 61 times [2021-06-05 23:44:03,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:03,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550473742] [2021-06-05 23:44:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:44:03,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:03,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550473742] [2021-06-05 23:44:03,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550473742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:03,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109276884] [2021-06-05 23:44:03,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:44:03,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:04,184 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:04,184 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 41 treesize of output 29 [2021-06-05 23:44:04,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:04,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:04,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:04,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:48 [2021-06-05 23:44:04,584 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 23:44:05,304 INFO L446 ElimStorePlain]: Different costs {1=[q3, v_prenex_171, v_prenex_167], 6=[q1], 10=[v_prenex_170, v_prenex_166]} [2021-06-05 23:44:05,311 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:44:05,311 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 24 [2021-06-05 23:44:05,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:05,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 23:44:05,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,389 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:44:05,389 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 34 treesize of output 22 [2021-06-05 23:44:05,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,452 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:44:05,452 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 22 [2021-06-05 23:44:05,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,511 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:44:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 21 [2021-06-05 23:44:05,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,579 INFO L628 ElimStorePlain]: treesize reduction 51, result has 70.7 percent of original size [2021-06-05 23:44:05,584 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:44:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 21 [2021-06-05 23:44:05,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,614 INFO L628 ElimStorePlain]: treesize reduction 51, result has 40.7 percent of original size [2021-06-05 23:44:05,614 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-05 23:44:05,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:44:05,615 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:305, output treesize:31 [2021-06-05 23:44:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:44:05,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109276884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:05,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:05,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 32 [2021-06-05 23:44:05,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685604969] [2021-06-05 23:44:05,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:44:05,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:44:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:44:05,703 INFO L87 Difference]: Start difference. First operand 121290 states and 367373 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:12,292 INFO L93 Difference]: Finished difference Result 211726 states and 639910 transitions. [2021-06-05 23:44:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-05 23:44:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:44:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:12,680 INFO L225 Difference]: With dead ends: 211726 [2021-06-05 23:44:12,680 INFO L226 Difference]: Without dead ends: 207952 [2021-06-05 23:44:12,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6137 ImplicationChecksByTransitivity, 4593.9ms TimeCoverageRelationStatistics Valid=2145, Invalid=14625, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:44:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207952 states. [2021-06-05 23:44:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207952 to 124431. [2021-06-05 23:44:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124431 states, 124430 states have (on average 3.0311339709073373) internal successors, (377164), 124430 states have internal predecessors, (377164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124431 states to 124431 states and 377164 transitions. [2021-06-05 23:44:15,601 INFO L78 Accepts]: Start accepts. Automaton has 124431 states and 377164 transitions. Word has length 58 [2021-06-05 23:44:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:15,601 INFO L482 AbstractCegarLoop]: Abstraction has 124431 states and 377164 transitions. [2021-06-05 23:44:15,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 124431 states and 377164 transitions. [2021-06-05 23:44:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:44:15,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:15,791 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:15,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-05 23:44:15,992 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash 66159645, now seen corresponding path program 62 times [2021-06-05 23:44:15,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:15,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284645121] [2021-06-05 23:44:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:44:16,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:16,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284645121] [2021-06-05 23:44:16,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284645121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:16,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476336434] [2021-06-05 23:44:16,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:16,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:16,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:44:16,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:16,900 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:44:16,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:44:16,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:44:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476336434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:16,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:16,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:44:16,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005259714] [2021-06-05 23:44:16,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:44:16,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:16,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:44:16,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:44:16,968 INFO L87 Difference]: Start difference. First operand 124431 states and 377164 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:18,315 INFO L93 Difference]: Finished difference Result 253327 states and 771814 transitions. [2021-06-05 23:44:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:44:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:44:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:19,469 INFO L225 Difference]: With dead ends: 253327 [2021-06-05 23:44:19,469 INFO L226 Difference]: Without dead ends: 253327 [2021-06-05 23:44:19,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:44:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253327 states. [2021-06-05 23:44:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253327 to 161233. [2021-06-05 23:44:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161233 states, 161232 states have (on average 3.0270541827924977) internal successors, (488058), 161232 states have internal predecessors, (488058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161233 states to 161233 states and 488058 transitions. [2021-06-05 23:44:22,990 INFO L78 Accepts]: Start accepts. Automaton has 161233 states and 488058 transitions. Word has length 58 [2021-06-05 23:44:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:22,990 INFO L482 AbstractCegarLoop]: Abstraction has 161233 states and 488058 transitions. [2021-06-05 23:44:22,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 161233 states and 488058 transitions. [2021-06-05 23:44:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:44:24,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:24,029 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:24,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:24,253 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1915394303, now seen corresponding path program 63 times [2021-06-05 23:44:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:24,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609750346] [2021-06-05 23:44:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:44:24,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:24,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609750346] [2021-06-05 23:44:24,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609750346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:24,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045049829] [2021-06-05 23:44:24,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:24,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:44:24,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:44:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:24,588 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:44:24,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:44:24,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:24,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:24,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:24,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:44:24,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045049829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:24,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:24,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 23:44:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047858166] [2021-06-05 23:44:24,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:44:24,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:44:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:44:24,615 INFO L87 Difference]: Start difference. First operand 161233 states and 488058 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:26,644 INFO L93 Difference]: Finished difference Result 235832 states and 713334 transitions. [2021-06-05 23:44:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:44:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:44:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:27,159 INFO L225 Difference]: With dead ends: 235832 [2021-06-05 23:44:27,159 INFO L226 Difference]: Without dead ends: 235832 [2021-06-05 23:44:27,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:44:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235832 states. [2021-06-05 23:44:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235832 to 157685. [2021-06-05 23:44:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157685 states, 157684 states have (on average 3.02498668222521) internal successors, (476992), 157684 states have internal predecessors, (476992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157685 states to 157685 states and 476992 transitions. [2021-06-05 23:44:30,567 INFO L78 Accepts]: Start accepts. Automaton has 157685 states and 476992 transitions. Word has length 58 [2021-06-05 23:44:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:30,567 INFO L482 AbstractCegarLoop]: Abstraction has 157685 states and 476992 transitions. [2021-06-05 23:44:30,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 157685 states and 476992 transitions. [2021-06-05 23:44:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:44:31,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:31,525 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:31,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:31,761 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash -593309503, now seen corresponding path program 64 times [2021-06-05 23:44:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451113234] [2021-06-05 23:44:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:32,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:32,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451113234] [2021-06-05 23:44:32,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451113234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:32,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806218300] [2021-06-05 23:44:32,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:32,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:44:32,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:32,612 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:44:32,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:44:32,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:32,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:32,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:32,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:44:32,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806218300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:32,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:32,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 36 [2021-06-05 23:44:32,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847321526] [2021-06-05 23:44:32,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:44:32,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:44:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:44:32,659 INFO L87 Difference]: Start difference. First operand 157685 states and 476992 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:34,666 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 Received shutdown request... [2021-06-05 23:44:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:44:36,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:36,210 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:44:36,212 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:44:36,213 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:44:36,213 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:44:36 BasicIcfg [2021-06-05 23:44:36,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:44:36,214 INFO L168 Benchmark]: Toolchain (without parser) took 696265.75 ms. Allocated memory was 356.5 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 335.8 MB in the beginning and 14.4 GB in the end (delta: -14.0 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 23:44:36,214 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory is still 337.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:44:36,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.00 ms. Allocated memory is still 356.5 MB. Free memory was 335.7 MB in the beginning and 334.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:44:36,214 INFO L168 Benchmark]: Boogie Preprocessor took 25.82 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 333.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:44:36,214 INFO L168 Benchmark]: RCFGBuilder took 400.43 ms. Allocated memory is still 356.5 MB. Free memory was 333.2 MB in the beginning and 340.4 MB in the end (delta: -7.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.0 GB. [2021-06-05 23:44:36,214 INFO L168 Benchmark]: TraceAbstraction took 695806.98 ms. Allocated memory was 356.5 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 339.9 MB in the beginning and 14.4 GB in the end (delta: -14.0 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 23:44:36,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory is still 337.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.00 ms. Allocated memory is still 356.5 MB. Free memory was 335.7 MB in the beginning and 334.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.82 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 333.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 400.43 ms. Allocated memory is still 356.5 MB. Free memory was 333.2 MB in the beginning and 340.4 MB in the end (delta: -7.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 695806.98 ms. Allocated memory was 356.5 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 339.9 MB in the beginning and 14.4 GB in the end (delta: -14.0 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (157685states) and FLOYD_HOARE automaton (currently 60 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (408 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 695724.9ms, OverallIterations: 67, TraceHistogramMax: 6, EmptinessCheckTime: 9897.3ms, AutomataDifference: 518009.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9709 SDtfs, 52723 SDslu, 134395 SDs, 0 SdLazy, 176558 SolverSat, 13592 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81055.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11863 GetRequests, 2666 SyntacticMatches, 12 SemanticMatches, 9185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872710 ImplicationChecksByTransitivity, 408202.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=161233occurred in iteration=65, InterpolantAutomatonStates: 8350, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 94715.9ms AutomataMinimizationTime, 66 MinimizatonAttempts, 2845723 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 521.4ms SsaConstructionTime, 2427.0ms SatisfiabilityAnalysisTime, 55179.0ms InterpolantComputationTime, 6715 NumberOfCodeBlocks, 6715 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 6585 ConstructedInterpolants, 54 QuantifiedInterpolants, 114180 SizeOfPredicates, 617 NumberOfNonLiveVariables, 8537 ConjunctsInSsa, 1430 ConjunctsInUnsatCore, 130 InterpolantComputations, 4 PerfectInterpolantSequences, 1216/6642 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