/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:56:39,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:56:39,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:56:39,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:56:39,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:56:39,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:56:39,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:56:39,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 15:56:39,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:56:39,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:56:39,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:56:39,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:56:39,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:56:39,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:56:39,382 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:56:39,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:56:39,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:56:39,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:56:39,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:56:39,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:56:39,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:56:39,386 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:56:39,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:56:39,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:56:39,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:56:39,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:56:39,687 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:56:39,692 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:56:39,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-06-05 15:56:39,707 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-06-05 15:56:39,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:56:39,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:56:39,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:56:39,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:56:39,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:56:39,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:56:39,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:56:39,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:56:39,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:56:39,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... [2021-06-05 15:56:39,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:56:39,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:56:39,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:56:39,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:56:39,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:56:39,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:56:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:56:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:56:39,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:56:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:56:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:56:39,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:56:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:56:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:56:39,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:56:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:56:39,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:56:39,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:56:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:56:39,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:56:39,865 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:56:40,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:56:40,177 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:56:40,179 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:56:40 BoogieIcfgContainer [2021-06-05 15:56:40,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:56:40,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:56:40,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:56:40,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:56:40,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:56:39" (1/2) ... [2021-06-05 15:56:40,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e20bbdb and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:56:40, skipping insertion in model container [2021-06-05 15:56:40,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:56:40" (2/2) ... [2021-06-05 15:56:40,185 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-06-05 15:56:40,189 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:56:40,190 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:56:40,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:56:40,190 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:56:40,255 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:56:40,274 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:56:40,290 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:56:40,290 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:56:40,290 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:56:40,291 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:56:40,291 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:56:40,291 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:56:40,291 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:56:40,291 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:56:40,305 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 15:56:40,370 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:56:40,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:40,397 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:40,398 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:40,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1014933584, now seen corresponding path program 1 times [2021-06-05 15:56:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:40,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394313041] [2021-06-05 15:56:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:40,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:40,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394313041] [2021-06-05 15:56:40,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394313041] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:56:40,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:56:40,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:56:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732049074] [2021-06-05 15:56:40,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:56:40,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:40,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:56:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:56:40,600 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:40,647 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2021-06-05 15:56:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:56:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:56:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:40,670 INFO L225 Difference]: With dead ends: 691 [2021-06-05 15:56:40,670 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 15:56:40,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:56:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 15:56:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-06-05 15:56:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-06-05 15:56:40,781 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-06-05 15:56:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:40,782 INFO L482 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-06-05 15:56:40,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-06-05 15:56:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:56:40,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:40,786 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:40,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:56:40,786 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:40,787 INFO L82 PathProgramCache]: Analyzing trace with hash 810519764, now seen corresponding path program 1 times [2021-06-05 15:56:40,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:40,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183164478] [2021-06-05 15:56:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:40,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:40,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183164478] [2021-06-05 15:56:40,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183164478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630780769] [2021-06-05 15:56:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:56:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:40,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630780769] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:56:40,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:56:40,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 15:56:40,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451719140] [2021-06-05 15:56:40,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:56:40,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:41,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:56:41,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:56:41,007 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:41,053 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2021-06-05 15:56:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:56:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:56:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:41,066 INFO L225 Difference]: With dead ends: 1250 [2021-06-05 15:56:41,066 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 15:56:41,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:56:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 15:56:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-06-05 15:56:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-06-05 15:56:41,120 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-06-05 15:56:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:41,121 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-06-05 15:56:41,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-06-05 15:56:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:56:41,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:41,125 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:41,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:56:41,348 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 234896854, now seen corresponding path program 1 times [2021-06-05 15:56:41,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:41,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303418930] [2021-06-05 15:56:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:41,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:41,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303418930] [2021-06-05 15:56:41,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303418930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:41,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919505611] [2021-06-05 15:56:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:56:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:41,660 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 15:56:41,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:41,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:41,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:41,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:56:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:41,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919505611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:41,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:41,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 15:56:41,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699588316] [2021-06-05 15:56:41,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:56:41,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:56:41,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:56:41,702 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:41,807 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2021-06-05 15:56:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:56:41,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:56:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:41,819 INFO L225 Difference]: With dead ends: 1934 [2021-06-05 15:56:41,819 INFO L226 Difference]: Without dead ends: 1807 [2021-06-05 15:56:41,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:56:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-05 15:56:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-06-05 15:56:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-06-05 15:56:41,870 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-06-05 15:56:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:41,872 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-06-05 15:56:41,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-06-05 15:56:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:56:41,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:41,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:42,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:42,089 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1112061528, now seen corresponding path program 2 times [2021-06-05 15:56:42,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:42,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731930142] [2021-06-05 15:56:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:42,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:42,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731930142] [2021-06-05 15:56:42,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731930142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:42,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474879696] [2021-06-05 15:56:42,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:42,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:42,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:42,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:56:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474879696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:42,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:42,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 15:56:42,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467572456] [2021-06-05 15:56:42,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:56:42,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:42,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:56:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:56:42,314 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:42,384 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2021-06-05 15:56:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:56:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:56:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:42,398 INFO L225 Difference]: With dead ends: 2404 [2021-06-05 15:56:42,398 INFO L226 Difference]: Without dead ends: 2234 [2021-06-05 15:56:42,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:56:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-06-05 15:56:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-06-05 15:56:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-06-05 15:56:42,496 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-06-05 15:56:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:42,496 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-06-05 15:56:42,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-06-05 15:56:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:56:42,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:42,504 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:42,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:42,726 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:42,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1469512084, now seen corresponding path program 1 times [2021-06-05 15:56:42,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:42,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580621351] [2021-06-05 15:56:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:42,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:42,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580621351] [2021-06-05 15:56:42,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580621351] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:56:42,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:56:42,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:56:42,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506579807] [2021-06-05 15:56:42,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:56:42,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:42,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:56:42,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:56:42,792 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:42,834 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2021-06-05 15:56:42,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:56:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:56:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:42,855 INFO L225 Difference]: With dead ends: 3426 [2021-06-05 15:56:42,855 INFO L226 Difference]: Without dead ends: 3255 [2021-06-05 15:56:42,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:56:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-06-05 15:56:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-06-05 15:56:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-06-05 15:56:42,951 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-06-05 15:56:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:42,954 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-06-05 15:56:42,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-06-05 15:56:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:56:42,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:42,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:42,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:56:42,965 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1414582092, now seen corresponding path program 3 times [2021-06-05 15:56:42,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:42,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341297617] [2021-06-05 15:56:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:43,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341297617] [2021-06-05 15:56:43,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341297617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:43,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984217292] [2021-06-05 15:56:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:43,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:56:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:56:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:43,322 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:56:43,322 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 28 treesize of output 12 [2021-06-05 15:56:43,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:43,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:43,329 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 15:56:43,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:3 [2021-06-05 15:56:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:43,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984217292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:43,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:43,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:56:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970086575] [2021-06-05 15:56:43,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:56:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:56:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:56:43,364 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:43,944 INFO L93 Difference]: Finished difference Result 7730 states and 29466 transitions. [2021-06-05 15:56:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:56:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:56:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:43,999 INFO L225 Difference]: With dead ends: 7730 [2021-06-05 15:56:43,999 INFO L226 Difference]: Without dead ends: 7083 [2021-06-05 15:56:44,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:56:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-06-05 15:56:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2938. [2021-06-05 15:56:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-06-05 15:56:44,162 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-06-05 15:56:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:44,163 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-06-05 15:56:44,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-06-05 15:56:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:56:44,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:44,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:44,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:44,398 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash -278300307, now seen corresponding path program 1 times [2021-06-05 15:56:44,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:44,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209785944] [2021-06-05 15:56:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:44,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209785944] [2021-06-05 15:56:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209785944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250049246] [2021-06-05 15:56:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:56:44,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:44,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250049246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:44,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:44,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 15:56:44,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508657600] [2021-06-05 15:56:44,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:56:44,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:56:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:56:44,578 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:44,858 INFO L93 Difference]: Finished difference Result 10521 states and 39058 transitions. [2021-06-05 15:56:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:56:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:56:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:44,897 INFO L225 Difference]: With dead ends: 10521 [2021-06-05 15:56:44,897 INFO L226 Difference]: Without dead ends: 10471 [2021-06-05 15:56:44,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:56:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2021-06-05 15:56:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 4032. [2021-06-05 15:56:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 4.0637558918382535) internal successors, (16381), 4031 states have internal predecessors, (16381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 16381 transitions. [2021-06-05 15:56:45,087 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 16381 transitions. Word has length 29 [2021-06-05 15:56:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:45,087 INFO L482 AbstractCegarLoop]: Abstraction has 4032 states and 16381 transitions. [2021-06-05 15:56:45,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 16381 transitions. [2021-06-05 15:56:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:56:45,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:45,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:45,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 15:56:45,313 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1740155411, now seen corresponding path program 2 times [2021-06-05 15:56:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:45,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857640794] [2021-06-05 15:56:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:45,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:45,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857640794] [2021-06-05 15:56:45,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857640794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:45,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948104360] [2021-06-05 15:56:45,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:45,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:45,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:56:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:56:45,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948104360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:45,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:45,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 15:56:45,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207267465] [2021-06-05 15:56:45,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:56:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:45,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:56:45,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:56:45,491 INFO L87 Difference]: Start difference. First operand 4032 states and 16381 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:45,752 INFO L93 Difference]: Finished difference Result 9257 states and 34579 transitions. [2021-06-05 15:56:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:56:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:56:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:45,785 INFO L225 Difference]: With dead ends: 9257 [2021-06-05 15:56:45,785 INFO L226 Difference]: Without dead ends: 9257 [2021-06-05 15:56:45,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:56:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2021-06-05 15:56:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 4377. [2021-06-05 15:56:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.039076782449726) internal successors, (17675), 4376 states have internal predecessors, (17675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 17675 transitions. [2021-06-05 15:56:45,945 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 17675 transitions. Word has length 29 [2021-06-05 15:56:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:45,945 INFO L482 AbstractCegarLoop]: Abstraction has 4377 states and 17675 transitions. [2021-06-05 15:56:45,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 17675 transitions. [2021-06-05 15:56:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:56:45,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:45,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:46,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:46,177 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash 805726646, now seen corresponding path program 4 times [2021-06-05 15:56:46,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:46,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919671319] [2021-06-05 15:56:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:46,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:46,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919671319] [2021-06-05 15:56:46,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919671319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:46,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501538065] [2021-06-05 15:56:46,240 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:46,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:56:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:46,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501538065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:46,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:46,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 15:56:46,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176830865] [2021-06-05 15:56:46,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:56:46,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:56:46,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:56:46,371 INFO L87 Difference]: Start difference. First operand 4377 states and 17675 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:46,466 INFO L93 Difference]: Finished difference Result 8693 states and 34994 transitions. [2021-06-05 15:56:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:56:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:56:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:46,495 INFO L225 Difference]: With dead ends: 8693 [2021-06-05 15:56:46,496 INFO L226 Difference]: Without dead ends: 8349 [2021-06-05 15:56:46,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:56:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-06-05 15:56:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 6935. [2021-06-05 15:56:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 4.129795211998847) internal successors, (28636), 6934 states have internal predecessors, (28636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 28636 transitions. [2021-06-05 15:56:46,720 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 28636 transitions. Word has length 31 [2021-06-05 15:56:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:46,720 INFO L482 AbstractCegarLoop]: Abstraction has 6935 states and 28636 transitions. [2021-06-05 15:56:46,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 28636 transitions. [2021-06-05 15:56:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:56:46,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:46,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:46,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:46,971 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2078445969, now seen corresponding path program 3 times [2021-06-05 15:56:46,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:46,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850148810] [2021-06-05 15:56:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:46,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:47,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850148810] [2021-06-05 15:56:47,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850148810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:47,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738194429] [2021-06-05 15:56:47,000 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 15:56:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:56:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:56:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:56:47,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738194429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:47,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:47,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 15:56:47,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567897461] [2021-06-05 15:56:47,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:56:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:56:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:56:47,151 INFO L87 Difference]: Start difference. First operand 6935 states and 28636 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:47,206 INFO L93 Difference]: Finished difference Result 8766 states and 35643 transitions. [2021-06-05 15:56:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:56:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:56:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:47,232 INFO L225 Difference]: With dead ends: 8766 [2021-06-05 15:56:47,232 INFO L226 Difference]: Without dead ends: 8766 [2021-06-05 15:56:47,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:56:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8766 states. [2021-06-05 15:56:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8766 to 6543. [2021-06-05 15:56:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6543 states, 6542 states have (on average 4.076123509630083) internal successors, (26666), 6542 states have internal predecessors, (26666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6543 states to 6543 states and 26666 transitions. [2021-06-05 15:56:47,416 INFO L78 Accepts]: Start accepts. Automaton has 6543 states and 26666 transitions. Word has length 32 [2021-06-05 15:56:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:47,416 INFO L482 AbstractCegarLoop]: Abstraction has 6543 states and 26666 transitions. [2021-06-05 15:56:47,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6543 states and 26666 transitions. [2021-06-05 15:56:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:47,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:47,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:47,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:56:47,648 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2103834406, now seen corresponding path program 5 times [2021-06-05 15:56:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:47,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125109378] [2021-06-05 15:56:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:47,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125109378] [2021-06-05 15:56:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125109378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189065743] [2021-06-05 15:56:47,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:47,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:56:47,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:56:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:48,159 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:56:48,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 15:56:48,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:48,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:48,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:48,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:3 [2021-06-05 15:56:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:48,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189065743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:48,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:48,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 15:56:48,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556972506] [2021-06-05 15:56:48,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:56:48,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:56:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:56:48,200 INFO L87 Difference]: Start difference. First operand 6543 states and 26666 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:48,802 INFO L93 Difference]: Finished difference Result 15514 states and 62640 transitions. [2021-06-05 15:56:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:56:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:56:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:48,867 INFO L225 Difference]: With dead ends: 15514 [2021-06-05 15:56:48,867 INFO L226 Difference]: Without dead ends: 14945 [2021-06-05 15:56:48,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:56:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14945 states. [2021-06-05 15:56:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14945 to 6988. [2021-06-05 15:56:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6988 states, 6987 states have (on average 4.0978960927436665) internal successors, (28632), 6987 states have internal predecessors, (28632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 28632 transitions. [2021-06-05 15:56:49,217 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 28632 transitions. Word has length 34 [2021-06-05 15:56:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:49,217 INFO L482 AbstractCegarLoop]: Abstraction has 6988 states and 28632 transitions. [2021-06-05 15:56:49,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 28632 transitions. [2021-06-05 15:56:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:49,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:49,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:49,460 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -261271277, now seen corresponding path program 4 times [2021-06-05 15:56:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:49,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590873769] [2021-06-05 15:56:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:49,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:49,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590873769] [2021-06-05 15:56:49,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590873769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:49,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491174791] [2021-06-05 15:56:49,599 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:49,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:56:49,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:56:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:49,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:56:49,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 15:56:49,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:49,872 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-05 15:56:49,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:49,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 15:56:49,947 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 11 [2021-06-05 15:56:49,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:49,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:49,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:49,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-05 15:56:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491174791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:49,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:49,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:56:49,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665410064] [2021-06-05 15:56:49,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:56:49,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:49,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:56:49,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:56:49,966 INFO L87 Difference]: Start difference. First operand 6988 states and 28632 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:50,704 INFO L93 Difference]: Finished difference Result 25400 states and 103218 transitions. [2021-06-05 15:56:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:56:50,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:56:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:50,767 INFO L225 Difference]: With dead ends: 25400 [2021-06-05 15:56:50,767 INFO L226 Difference]: Without dead ends: 25281 [2021-06-05 15:56:50,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:56:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25281 states. [2021-06-05 15:56:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25281 to 9001. [2021-06-05 15:56:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 4.129111111111111) internal successors, (37162), 9000 states have internal predecessors, (37162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 37162 transitions. [2021-06-05 15:56:51,187 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 37162 transitions. Word has length 34 [2021-06-05 15:56:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:51,187 INFO L482 AbstractCegarLoop]: Abstraction has 9001 states and 37162 transitions. [2021-06-05 15:56:51,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 37162 transitions. [2021-06-05 15:56:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:51,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:51,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:51,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:51,522 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:51,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2139027627, now seen corresponding path program 5 times [2021-06-05 15:56:51,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:51,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862670424] [2021-06-05 15:56:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:51,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:51,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862670424] [2021-06-05 15:56:51,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862670424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:51,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787748245] [2021-06-05 15:56:51,641 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:51,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:56:51,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:56:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:51,835 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 23 treesize of output 19 [2021-06-05 15:56:51,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:51,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:51,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:51,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:32 [2021-06-05 15:56:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:56:51,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 15:56:51,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:56:51,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:51,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:56:51,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:19 [2021-06-05 15:56:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:52,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787748245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:52,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:52,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:56:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242242174] [2021-06-05 15:56:52,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:56:52,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:56:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:56:52,038 INFO L87 Difference]: Start difference. First operand 9001 states and 37162 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:53,175 INFO L93 Difference]: Finished difference Result 32458 states and 131491 transitions. [2021-06-05 15:56:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:56:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:56:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:53,256 INFO L225 Difference]: With dead ends: 32458 [2021-06-05 15:56:53,256 INFO L226 Difference]: Without dead ends: 32180 [2021-06-05 15:56:53,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 686.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:56:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32180 states. [2021-06-05 15:56:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32180 to 10707. [2021-06-05 15:56:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10706 states have (on average 4.137492994582477) internal successors, (44296), 10706 states have internal predecessors, (44296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 44296 transitions. [2021-06-05 15:56:53,826 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 44296 transitions. Word has length 34 [2021-06-05 15:56:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:53,826 INFO L482 AbstractCegarLoop]: Abstraction has 10707 states and 44296 transitions. [2021-06-05 15:56:53,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 44296 transitions. [2021-06-05 15:56:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:53,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:53,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:54,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 15:56:54,153 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 558139797, now seen corresponding path program 6 times [2021-06-05 15:56:54,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:54,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323598979] [2021-06-05 15:56:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:54,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323598979] [2021-06-05 15:56:54,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323598979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103339856] [2021-06-05 15:56:54,241 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:54,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:56:54,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:54,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:56:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:54,409 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 26 treesize of output 20 [2021-06-05 15:56:54,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:54,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:54,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:54,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-06-05 15:56:54,472 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:56:54,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:56:54,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:54,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:54,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:54,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:56:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:54,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103339856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:54,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:54,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:56:54,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632307478] [2021-06-05 15:56:54,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:56:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:54,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:56:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:56:54,498 INFO L87 Difference]: Start difference. First operand 10707 states and 44296 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:55,218 INFO L93 Difference]: Finished difference Result 26534 states and 108256 transitions. [2021-06-05 15:56:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:56:55,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:56:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:55,307 INFO L225 Difference]: With dead ends: 26534 [2021-06-05 15:56:55,307 INFO L226 Difference]: Without dead ends: 26159 [2021-06-05 15:56:55,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:56:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26159 states. [2021-06-05 15:56:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26159 to 10839. [2021-06-05 15:56:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 4.141169957556745) internal successors, (44882), 10838 states have internal predecessors, (44882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 44882 transitions. [2021-06-05 15:56:55,726 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 44882 transitions. Word has length 34 [2021-06-05 15:56:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:55,726 INFO L482 AbstractCegarLoop]: Abstraction has 10839 states and 44882 transitions. [2021-06-05 15:56:55,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 44882 transitions. [2021-06-05 15:56:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:55,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:55,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:55,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:55,946 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:55,946 INFO L82 PathProgramCache]: Analyzing trace with hash -915631833, now seen corresponding path program 7 times [2021-06-05 15:56:55,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:55,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122878122] [2021-06-05 15:56:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:56,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:56,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122878122] [2021-06-05 15:56:56,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122878122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:56,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954342128] [2021-06-05 15:56:56,036 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:56:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:56,204 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:56:56,204 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 15:56:56,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:56,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:56,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:56,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:12 [2021-06-05 15:56:56,315 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 27 treesize of output 21 [2021-06-05 15:56:56,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:56,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:56,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:56,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 15:56:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:56,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954342128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:56,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:56,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:56:56,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947142949] [2021-06-05 15:56:56,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:56:56,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:56:56,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:56:56,338 INFO L87 Difference]: Start difference. First operand 10839 states and 44882 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:57,406 INFO L93 Difference]: Finished difference Result 26318 states and 105170 transitions. [2021-06-05 15:56:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:56:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:56:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:57,476 INFO L225 Difference]: With dead ends: 26318 [2021-06-05 15:56:57,476 INFO L226 Difference]: Without dead ends: 26199 [2021-06-05 15:56:57,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:56:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26199 states. [2021-06-05 15:56:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26199 to 11097. [2021-06-05 15:56:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 11096 states have (on average 4.143294881038212) internal successors, (45974), 11096 states have internal predecessors, (45974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 45974 transitions. [2021-06-05 15:56:57,860 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 45974 transitions. Word has length 34 [2021-06-05 15:56:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 11097 states and 45974 transitions. [2021-06-05 15:56:57,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 45974 transitions. [2021-06-05 15:56:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:57,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:57,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:58,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:56:58,080 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1690450347, now seen corresponding path program 8 times [2021-06-05 15:56:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:58,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469964937] [2021-06-05 15:56:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:58,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469964937] [2021-06-05 15:56:58,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469964937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427915331] [2021-06-05 15:56:58,167 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:58,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:56:58,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:56:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:56:58,349 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:56:58,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 15:56:58,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:58,358 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-05 15:56:58,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:58,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 15:56:58,406 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 11 [2021-06-05 15:56:58,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:56:58,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:56:58,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:56:58,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-05 15:56:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427915331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:58,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:56:58,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:56:58,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262961015] [2021-06-05 15:56:58,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:56:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:56:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:56:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:56:58,427 INFO L87 Difference]: Start difference. First operand 11097 states and 45974 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:56:59,072 INFO L93 Difference]: Finished difference Result 27574 states and 112518 transitions. [2021-06-05 15:56:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:56:59,073 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:56:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:56:59,156 INFO L225 Difference]: With dead ends: 27574 [2021-06-05 15:56:59,156 INFO L226 Difference]: Without dead ends: 27455 [2021-06-05 15:56:59,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:56:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27455 states. [2021-06-05 15:56:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27455 to 11115. [2021-06-05 15:56:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11115 states, 11114 states have (on average 4.143332733489292) internal successors, (46049), 11114 states have internal predecessors, (46049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11115 states to 11115 states and 46049 transitions. [2021-06-05 15:56:59,442 INFO L78 Accepts]: Start accepts. Automaton has 11115 states and 46049 transitions. Word has length 34 [2021-06-05 15:56:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:56:59,442 INFO L482 AbstractCegarLoop]: Abstraction has 11115 states and 46049 transitions. [2021-06-05 15:56:59,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:56:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 11115 states and 46049 transitions. [2021-06-05 15:56:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:56:59,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:56:59,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:56:59,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:59,781 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:56:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:56:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash 726760599, now seen corresponding path program 9 times [2021-06-05 15:56:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:56:59,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475649698] [2021-06-05 15:56:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:56:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:56:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:56:59,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:56:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475649698] [2021-06-05 15:56:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475649698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:56:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706450187] [2021-06-05 15:56:59,868 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:56:59,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:56:59,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:56:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:56:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:00,101 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 30 treesize of output 24 [2021-06-05 15:57:00,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:00,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:00,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:00,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:27 [2021-06-05 15:57:00,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:00,156 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 17 [2021-06-05 15:57:00,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:57:00,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:00,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:00,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-06-05 15:57:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:00,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706450187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:00,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:00,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:57:00,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484626925] [2021-06-05 15:57:00,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:57:00,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:00,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:57:00,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:57:00,217 INFO L87 Difference]: Start difference. First operand 11115 states and 46049 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:01,195 INFO L93 Difference]: Finished difference Result 36724 states and 147844 transitions. [2021-06-05 15:57:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:57:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:01,294 INFO L225 Difference]: With dead ends: 36724 [2021-06-05 15:57:01,294 INFO L226 Difference]: Without dead ends: 36230 [2021-06-05 15:57:01,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:57:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36230 states. [2021-06-05 15:57:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36230 to 12619. [2021-06-05 15:57:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12619 states, 12618 states have (on average 4.176890156918687) internal successors, (52704), 12618 states have internal predecessors, (52704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12619 states to 12619 states and 52704 transitions. [2021-06-05 15:57:01,727 INFO L78 Accepts]: Start accepts. Automaton has 12619 states and 52704 transitions. Word has length 34 [2021-06-05 15:57:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:01,728 INFO L482 AbstractCegarLoop]: Abstraction has 12619 states and 52704 transitions. [2021-06-05 15:57:01,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 12619 states and 52704 transitions. [2021-06-05 15:57:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:01,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:01,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:01,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:57:01,966 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1859008693, now seen corresponding path program 10 times [2021-06-05 15:57:01,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:01,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685853007] [2021-06-05 15:57:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:02,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:02,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685853007] [2021-06-05 15:57:02,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685853007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:02,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042929347] [2021-06-05 15:57:02,077 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:02,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:02,383 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 15:57:02,395 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:02,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 15:57:02,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:02,404 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-05 15:57:02,404 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 15:57:02,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 15:57:02,447 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 11 [2021-06-05 15:57:02,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:02,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:02,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:02,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-05 15:57:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042929347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:02,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:02,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:02,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219309515] [2021-06-05 15:57:02,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:02,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:02,466 INFO L87 Difference]: Start difference. First operand 12619 states and 52704 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:03,061 INFO L93 Difference]: Finished difference Result 29754 states and 122735 transitions. [2021-06-05 15:57:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:57:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:03,135 INFO L225 Difference]: With dead ends: 29754 [2021-06-05 15:57:03,135 INFO L226 Difference]: Without dead ends: 29635 [2021-06-05 15:57:03,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:57:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29635 states. [2021-06-05 15:57:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29635 to 13941. [2021-06-05 15:57:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13941 states, 13940 states have (on average 4.193615494978479) internal successors, (58459), 13940 states have internal predecessors, (58459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13941 states to 13941 states and 58459 transitions. [2021-06-05 15:57:03,524 INFO L78 Accepts]: Start accepts. Automaton has 13941 states and 58459 transitions. Word has length 34 [2021-06-05 15:57:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:03,524 INFO L482 AbstractCegarLoop]: Abstraction has 13941 states and 58459 transitions. [2021-06-05 15:57:03,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 13941 states and 58459 transitions. [2021-06-05 15:57:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:03,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:03,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:03,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:57:03,773 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash 558202253, now seen corresponding path program 11 times [2021-06-05 15:57:03,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:03,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343213347] [2021-06-05 15:57:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:03,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:03,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343213347] [2021-06-05 15:57:03,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343213347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:03,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902373506] [2021-06-05 15:57:03,877 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:03,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:57:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:57:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:04,282 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 28 treesize of output 22 [2021-06-05 15:57:04,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:04,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:04,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:57:04,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:38 [2021-06-05 15:57:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:04,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:57:04,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:57:04,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:04,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:04,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:04,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:3 [2021-06-05 15:57:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:04,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902373506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:04,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:04,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556695764] [2021-06-05 15:57:04,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:04,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:04,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:04,399 INFO L87 Difference]: Start difference. First operand 13941 states and 58459 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:05,313 INFO L93 Difference]: Finished difference Result 26327 states and 107474 transitions. [2021-06-05 15:57:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:57:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:05,385 INFO L225 Difference]: With dead ends: 26327 [2021-06-05 15:57:05,385 INFO L226 Difference]: Without dead ends: 26057 [2021-06-05 15:57:05,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:57:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-06-05 15:57:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 13741. [2021-06-05 15:57:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13741 states, 13740 states have (on average 4.189010189228529) internal successors, (57557), 13740 states have internal predecessors, (57557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 57557 transitions. [2021-06-05 15:57:05,764 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 57557 transitions. Word has length 34 [2021-06-05 15:57:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:05,764 INFO L482 AbstractCegarLoop]: Abstraction has 13741 states and 57557 transitions. [2021-06-05 15:57:05,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 57557 transitions. [2021-06-05 15:57:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:05,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:05,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:57:05,997 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1039597619, now seen corresponding path program 12 times [2021-06-05 15:57:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:05,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836040606] [2021-06-05 15:57:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:06,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:06,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836040606] [2021-06-05 15:57:06,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836040606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:06,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932759205] [2021-06-05 15:57:06,096 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:06,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:57:06,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:57:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:06,270 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 26 treesize of output 20 [2021-06-05 15:57:06,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:06,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-06-05 15:57:06,335 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:06,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:06,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:06,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:06,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:06,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932759205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:06,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:06,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:06,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948617202] [2021-06-05 15:57:06,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:06,360 INFO L87 Difference]: Start difference. First operand 13741 states and 57557 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:07,074 INFO L93 Difference]: Finished difference Result 29050 states and 119504 transitions. [2021-06-05 15:57:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:57:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:07,154 INFO L225 Difference]: With dead ends: 29050 [2021-06-05 15:57:07,154 INFO L226 Difference]: Without dead ends: 28675 [2021-06-05 15:57:07,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:57:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28675 states. [2021-06-05 15:57:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28675 to 12934. [2021-06-05 15:57:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12934 states, 12933 states have (on average 4.187582154179231) internal successors, (54158), 12933 states have internal predecessors, (54158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12934 states to 12934 states and 54158 transitions. [2021-06-05 15:57:07,549 INFO L78 Accepts]: Start accepts. Automaton has 12934 states and 54158 transitions. Word has length 34 [2021-06-05 15:57:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:07,549 INFO L482 AbstractCegarLoop]: Abstraction has 12934 states and 54158 transitions. [2021-06-05 15:57:07,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12934 states and 54158 transitions. [2021-06-05 15:57:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:07,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:07,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:07,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:07,773 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1263963071, now seen corresponding path program 13 times [2021-06-05 15:57:07,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:07,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81170246] [2021-06-05 15:57:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:07,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:07,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81170246] [2021-06-05 15:57:07,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81170246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:07,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056966233] [2021-06-05 15:57:07,893 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:08,087 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:08,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 15:57:08,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:08,097 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-05 15:57:08,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:08,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 15:57:08,147 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 11 [2021-06-05 15:57:08,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:08,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:08,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:08,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-05 15:57:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056966233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:08,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:08,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:08,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513543978] [2021-06-05 15:57:08,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:08,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:08,170 INFO L87 Difference]: Start difference. First operand 12934 states and 54158 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:09,177 INFO L93 Difference]: Finished difference Result 29789 states and 122414 transitions. [2021-06-05 15:57:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:57:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:09,254 INFO L225 Difference]: With dead ends: 29789 [2021-06-05 15:57:09,254 INFO L226 Difference]: Without dead ends: 29670 [2021-06-05 15:57:09,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 661.3ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:57:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29670 states. [2021-06-05 15:57:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29670 to 13720. [2021-06-05 15:57:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13720 states, 13719 states have (on average 4.202638676288359) internal successors, (57656), 13719 states have internal predecessors, (57656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13720 states to 13720 states and 57656 transitions. [2021-06-05 15:57:09,597 INFO L78 Accepts]: Start accepts. Automaton has 13720 states and 57656 transitions. Word has length 34 [2021-06-05 15:57:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:09,597 INFO L482 AbstractCegarLoop]: Abstraction has 13720 states and 57656 transitions. [2021-06-05 15:57:09,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 13720 states and 57656 transitions. [2021-06-05 15:57:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:09,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:09,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:09,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:09,829 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:09,830 INFO L82 PathProgramCache]: Analyzing trace with hash 308825101, now seen corresponding path program 14 times [2021-06-05 15:57:09,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:09,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398253430] [2021-06-05 15:57:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:09,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:09,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398253430] [2021-06-05 15:57:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398253430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:09,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964737207] [2021-06-05 15:57:09,937 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:09,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:10,136 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 32 treesize of output 26 [2021-06-05 15:57:10,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:10,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:10,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:10,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-06-05 15:57:10,178 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:10,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:10,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:10,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:10,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:10,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:10,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964737207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:10,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:10,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805984659] [2021-06-05 15:57:10,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:10,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:10,202 INFO L87 Difference]: Start difference. First operand 13720 states and 57656 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:10,900 INFO L93 Difference]: Finished difference Result 26211 states and 107588 transitions. [2021-06-05 15:57:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:57:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:10,971 INFO L225 Difference]: With dead ends: 26211 [2021-06-05 15:57:10,971 INFO L226 Difference]: Without dead ends: 25964 [2021-06-05 15:57:10,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:57:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25964 states. [2021-06-05 15:57:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25964 to 13612. [2021-06-05 15:57:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13612 states, 13611 states have (on average 4.200573065902579) internal successors, (57174), 13611 states have internal predecessors, (57174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13612 states to 13612 states and 57174 transitions. [2021-06-05 15:57:11,339 INFO L78 Accepts]: Start accepts. Automaton has 13612 states and 57174 transitions. Word has length 34 [2021-06-05 15:57:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:11,339 INFO L482 AbstractCegarLoop]: Abstraction has 13612 states and 57174 transitions. [2021-06-05 15:57:11,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13612 states and 57174 transitions. [2021-06-05 15:57:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:11,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:11,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:11,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 15:57:11,564 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1831752029, now seen corresponding path program 15 times [2021-06-05 15:57:11,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:11,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671013777] [2021-06-05 15:57:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:11,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:11,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671013777] [2021-06-05 15:57:11,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671013777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695607658] [2021-06-05 15:57:11,684 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:11,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:57:11,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:57:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:11,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 15:57:11,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:11,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:11,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:11,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:20 [2021-06-05 15:57:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:11,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:11,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 15:57:11,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:57:11,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:11,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:11,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-06-05 15:57:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:11,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695607658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:11,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:11,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:57:11,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065780357] [2021-06-05 15:57:11,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:57:11,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:11,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:57:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:57:11,991 INFO L87 Difference]: Start difference. First operand 13612 states and 57174 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:13,355 INFO L93 Difference]: Finished difference Result 30449 states and 124370 transitions. [2021-06-05 15:57:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:57:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:13,440 INFO L225 Difference]: With dead ends: 30449 [2021-06-05 15:57:13,440 INFO L226 Difference]: Without dead ends: 30138 [2021-06-05 15:57:13,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:57:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30138 states. [2021-06-05 15:57:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30138 to 14418. [2021-06-05 15:57:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14418 states, 14417 states have (on average 4.224942775889575) internal successors, (60911), 14417 states have internal predecessors, (60911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14418 states to 14418 states and 60911 transitions. [2021-06-05 15:57:13,862 INFO L78 Accepts]: Start accepts. Automaton has 14418 states and 60911 transitions. Word has length 34 [2021-06-05 15:57:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:13,862 INFO L482 AbstractCegarLoop]: Abstraction has 14418 states and 60911 transitions. [2021-06-05 15:57:13,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14418 states and 60911 transitions. [2021-06-05 15:57:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:13,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:13,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:14,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:57:14,093 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1129425885, now seen corresponding path program 16 times [2021-06-05 15:57:14,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:14,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342150163] [2021-06-05 15:57:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:14,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:14,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342150163] [2021-06-05 15:57:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342150163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:14,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600454102] [2021-06-05 15:57:14,203 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:14,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:14,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:14,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:57:14,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:14,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:14,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:14,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:57:14,412 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:14,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:14,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:14,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:14,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:14,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:14,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600454102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:14,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:14,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:14,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503756983] [2021-06-05 15:57:14,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:14,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:14,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:14,443 INFO L87 Difference]: Start difference. First operand 14418 states and 60911 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:15,055 INFO L93 Difference]: Finished difference Result 25997 states and 107292 transitions. [2021-06-05 15:57:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:57:15,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:15,125 INFO L225 Difference]: With dead ends: 25997 [2021-06-05 15:57:15,125 INFO L226 Difference]: Without dead ends: 25750 [2021-06-05 15:57:15,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:57:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25750 states. [2021-06-05 15:57:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25750 to 14703. [2021-06-05 15:57:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14703 states, 14702 states have (on average 4.2260916882056865) internal successors, (62132), 14702 states have internal predecessors, (62132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14703 states to 14703 states and 62132 transitions. [2021-06-05 15:57:15,505 INFO L78 Accepts]: Start accepts. Automaton has 14703 states and 62132 transitions. Word has length 34 [2021-06-05 15:57:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:15,506 INFO L482 AbstractCegarLoop]: Abstraction has 14703 states and 62132 transitions. [2021-06-05 15:57:15,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 14703 states and 62132 transitions. [2021-06-05 15:57:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:15,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:15,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:15,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:15,737 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1413995999, now seen corresponding path program 17 times [2021-06-05 15:57:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:15,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645810445] [2021-06-05 15:57:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:15,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:15,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645810445] [2021-06-05 15:57:15,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645810445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:15,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118508491] [2021-06-05 15:57:15,833 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:15,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:57:15,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:15,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:57:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:15,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:57:15,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:15,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:15,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:15,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 15:57:16,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:16,073 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 17 [2021-06-05 15:57:16,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:57:16,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:16,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:16,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-06-05 15:57:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118508491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:16,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:16,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:57:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39294383] [2021-06-05 15:57:16,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:57:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:57:16,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:57:16,137 INFO L87 Difference]: Start difference. First operand 14703 states and 62132 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:17,355 INFO L93 Difference]: Finished difference Result 36778 states and 151443 transitions. [2021-06-05 15:57:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:57:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:17,454 INFO L225 Difference]: With dead ends: 36778 [2021-06-05 15:57:17,454 INFO L226 Difference]: Without dead ends: 36316 [2021-06-05 15:57:17,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:57:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36316 states. [2021-06-05 15:57:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36316 to 15167. [2021-06-05 15:57:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15167 states, 15166 states have (on average 4.236845575629698) internal successors, (64256), 15166 states have internal predecessors, (64256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15167 states to 15167 states and 64256 transitions. [2021-06-05 15:57:18,015 INFO L78 Accepts]: Start accepts. Automaton has 15167 states and 64256 transitions. Word has length 34 [2021-06-05 15:57:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:18,015 INFO L482 AbstractCegarLoop]: Abstraction has 15167 states and 64256 transitions. [2021-06-05 15:57:18,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15167 states and 64256 transitions. [2021-06-05 15:57:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:18,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:18,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:18,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:57:18,242 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 445557917, now seen corresponding path program 18 times [2021-06-05 15:57:18,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:18,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315052572] [2021-06-05 15:57:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:18,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:18,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315052572] [2021-06-05 15:57:18,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315052572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:18,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005028445] [2021-06-05 15:57:18,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:18,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:57:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:57:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:18,490 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:18,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 15:57:18,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,499 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-05 15:57:18,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 15:57:18,538 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 11 [2021-06-05 15:57:18,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:18,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:18,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-05 15:57:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:18,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005028445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:18,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450470565] [2021-06-05 15:57:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:18,554 INFO L87 Difference]: Start difference. First operand 15167 states and 64256 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:19,530 INFO L93 Difference]: Finished difference Result 34137 states and 142225 transitions. [2021-06-05 15:57:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:57:19,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:19,622 INFO L225 Difference]: With dead ends: 34137 [2021-06-05 15:57:19,622 INFO L226 Difference]: Without dead ends: 34018 [2021-06-05 15:57:19,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:57:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34018 states. [2021-06-05 15:57:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34018 to 16582. [2021-06-05 15:57:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16582 states, 16581 states have (on average 4.253844762077076) internal successors, (70533), 16581 states have internal predecessors, (70533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16582 states to 16582 states and 70533 transitions. [2021-06-05 15:57:20,148 INFO L78 Accepts]: Start accepts. Automaton has 16582 states and 70533 transitions. Word has length 34 [2021-06-05 15:57:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:20,148 INFO L482 AbstractCegarLoop]: Abstraction has 16582 states and 70533 transitions. [2021-06-05 15:57:20,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 16582 states and 70533 transitions. [2021-06-05 15:57:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:20,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:20,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:20,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:20,377 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1432198433, now seen corresponding path program 19 times [2021-06-05 15:57:20,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:20,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959419119] [2021-06-05 15:57:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:20,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959419119] [2021-06-05 15:57:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959419119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405251516] [2021-06-05 15:57:20,446 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:20,808 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 32 treesize of output 26 [2021-06-05 15:57:20,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:20,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:20,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:20,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-06-05 15:57:20,838 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:20,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:20,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:20,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:20,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:20,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:20,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405251516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:20,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:20,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:20,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432837168] [2021-06-05 15:57:20,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:20,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:20,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:20,856 INFO L87 Difference]: Start difference. First operand 16582 states and 70533 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:21,414 INFO L93 Difference]: Finished difference Result 31839 states and 133096 transitions. [2021-06-05 15:57:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:57:21,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:21,494 INFO L225 Difference]: With dead ends: 31839 [2021-06-05 15:57:21,494 INFO L226 Difference]: Without dead ends: 31592 [2021-06-05 15:57:21,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:57:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31592 states. [2021-06-05 15:57:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31592 to 16366. [2021-06-05 15:57:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16366 states, 16365 states have (on average 4.249984723495264) internal successors, (69551), 16365 states have internal predecessors, (69551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16366 states to 16366 states and 69551 transitions. [2021-06-05 15:57:21,983 INFO L78 Accepts]: Start accepts. Automaton has 16366 states and 69551 transitions. Word has length 34 [2021-06-05 15:57:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:21,983 INFO L482 AbstractCegarLoop]: Abstraction has 16366 states and 69551 transitions. [2021-06-05 15:57:21,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16366 states and 69551 transitions. [2021-06-05 15:57:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:22,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:22,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:22,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:57:22,213 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1264968991, now seen corresponding path program 20 times [2021-06-05 15:57:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667742107] [2021-06-05 15:57:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:22,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667742107] [2021-06-05 15:57:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667742107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117169919] [2021-06-05 15:57:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:22,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:22,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:22,410 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 26 treesize of output 20 [2021-06-05 15:57:22,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:22,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:22,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:22,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-06-05 15:57:22,459 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:22,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:22,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:22,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:22,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:22,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117169919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:22,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:22,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:22,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552568350] [2021-06-05 15:57:22,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:22,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:22,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:22,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:22,478 INFO L87 Difference]: Start difference. First operand 16366 states and 69551 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:23,170 INFO L93 Difference]: Finished difference Result 34697 states and 144829 transitions. [2021-06-05 15:57:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:57:23,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:23,256 INFO L225 Difference]: With dead ends: 34697 [2021-06-05 15:57:23,257 INFO L226 Difference]: Without dead ends: 34322 [2021-06-05 15:57:23,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:57:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2021-06-05 15:57:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 15541. [2021-06-05 15:57:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15541 states, 15540 states have (on average 4.251287001287001) internal successors, (66065), 15540 states have internal predecessors, (66065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15541 states to 15541 states and 66065 transitions. [2021-06-05 15:57:23,845 INFO L78 Accepts]: Start accepts. Automaton has 15541 states and 66065 transitions. Word has length 34 [2021-06-05 15:57:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:23,845 INFO L482 AbstractCegarLoop]: Abstraction has 15541 states and 66065 transitions. [2021-06-05 15:57:23,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15541 states and 66065 transitions. [2021-06-05 15:57:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:23,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:23,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:24,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:57:24,073 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash 472814581, now seen corresponding path program 21 times [2021-06-05 15:57:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:24,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992777214] [2021-06-05 15:57:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:24,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:24,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992777214] [2021-06-05 15:57:24,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992777214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:24,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024197800] [2021-06-05 15:57:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:24,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:57:24,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:24,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:24,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 15:57:24,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:24,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:24,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:24,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-06-05 15:57:24,394 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:57:24,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:57:24,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:24,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:24,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:24,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-05 15:57:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:24,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024197800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:24,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:24,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:24,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732050092] [2021-06-05 15:57:24,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:24,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:24,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:24,420 INFO L87 Difference]: Start difference. First operand 15541 states and 66065 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:24,850 INFO L93 Difference]: Finished difference Result 27012 states and 112621 transitions. [2021-06-05 15:57:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:57:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:24,919 INFO L225 Difference]: With dead ends: 27012 [2021-06-05 15:57:24,919 INFO L226 Difference]: Without dead ends: 26829 [2021-06-05 15:57:24,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:57:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26829 states. [2021-06-05 15:57:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26829 to 15541. [2021-06-05 15:57:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15541 states, 15540 states have (on average 4.251287001287001) internal successors, (66065), 15540 states have internal predecessors, (66065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15541 states to 15541 states and 66065 transitions. [2021-06-05 15:57:25,421 INFO L78 Accepts]: Start accepts. Automaton has 15541 states and 66065 transitions. Word has length 34 [2021-06-05 15:57:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 15541 states and 66065 transitions. [2021-06-05 15:57:25,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 15541 states and 66065 transitions. [2021-06-05 15:57:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:25,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:25,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:25,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:57:25,649 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1175140725, now seen corresponding path program 22 times [2021-06-05 15:57:25,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:25,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863930977] [2021-06-05 15:57:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:25,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:25,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863930977] [2021-06-05 15:57:25,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863930977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:25,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086630099] [2021-06-05 15:57:25,738 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:25,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:25,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:25,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:57:25,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:57:25,938 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:25,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:25,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:25,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:25,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:25,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086630099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:25,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:25,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342284940] [2021-06-05 15:57:25,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:25,963 INFO L87 Difference]: Start difference. First operand 15541 states and 66065 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:26,677 INFO L93 Difference]: Finished difference Result 27776 states and 114590 transitions. [2021-06-05 15:57:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:57:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:26,746 INFO L225 Difference]: With dead ends: 27776 [2021-06-05 15:57:26,746 INFO L226 Difference]: Without dead ends: 27529 [2021-06-05 15:57:26,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:57:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27529 states. [2021-06-05 15:57:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27529 to 15553. [2021-06-05 15:57:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15553 states, 15552 states have (on average 4.251993312757202) internal successors, (66127), 15552 states have internal predecessors, (66127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15553 states to 15553 states and 66127 transitions. [2021-06-05 15:57:27,191 INFO L78 Accepts]: Start accepts. Automaton has 15553 states and 66127 transitions. Word has length 34 [2021-06-05 15:57:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:27,191 INFO L482 AbstractCegarLoop]: Abstraction has 15553 states and 66127 transitions. [2021-06-05 15:57:27,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 15553 states and 66127 transitions. [2021-06-05 15:57:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:27,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:27,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:27,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:27,426 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash -576404687, now seen corresponding path program 23 times [2021-06-05 15:57:27,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:27,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131273409] [2021-06-05 15:57:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:27,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:27,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131273409] [2021-06-05 15:57:27,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131273409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:27,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500487183] [2021-06-05 15:57:27,498 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:27,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:57:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:57:27,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:27,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:27,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:27,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:57:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:27,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 15:57:27,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:57:27,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:27,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:27,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:19 [2021-06-05 15:57:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:27,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500487183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:27,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:27,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:57:27,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257288498] [2021-06-05 15:57:27,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:57:27,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:57:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:57:27,740 INFO L87 Difference]: Start difference. First operand 15553 states and 66127 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:28,653 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-06-05 15:57:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:29,651 INFO L93 Difference]: Finished difference Result 59585 states and 244408 transitions. [2021-06-05 15:57:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:57:29,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:30,009 INFO L225 Difference]: With dead ends: 59585 [2021-06-05 15:57:30,010 INFO L226 Difference]: Without dead ends: 58310 [2021-06-05 15:57:30,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1220.9ms TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:57:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58310 states. [2021-06-05 15:57:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58310 to 21722. [2021-06-05 15:57:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21722 states, 21721 states have (on average 4.3382440955757104) internal successors, (94231), 21721 states have internal predecessors, (94231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21722 states to 21722 states and 94231 transitions. [2021-06-05 15:57:30,788 INFO L78 Accepts]: Start accepts. Automaton has 21722 states and 94231 transitions. Word has length 34 [2021-06-05 15:57:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:30,788 INFO L482 AbstractCegarLoop]: Abstraction has 21722 states and 94231 transitions. [2021-06-05 15:57:30,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 21722 states and 94231 transitions. [2021-06-05 15:57:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:30,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:30,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:31,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 15:57:31,025 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1390644577, now seen corresponding path program 24 times [2021-06-05 15:57:31,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:31,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478464392] [2021-06-05 15:57:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:31,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478464392] [2021-06-05 15:57:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478464392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564064724] [2021-06-05 15:57:31,120 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:31,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:57:31,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:57:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:31,200 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 13 treesize of output 9 [2021-06-05 15:57:31,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:31,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-05 15:57:31,286 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:31,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:31,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:31,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:31,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564064724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:31,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:31,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:31,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369134820] [2021-06-05 15:57:31,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:31,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:31,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:31,307 INFO L87 Difference]: Start difference. First operand 21722 states and 94231 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:31,924 INFO L93 Difference]: Finished difference Result 29627 states and 125061 transitions. [2021-06-05 15:57:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:57:31,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:32,044 INFO L225 Difference]: With dead ends: 29627 [2021-06-05 15:57:32,044 INFO L226 Difference]: Without dead ends: 29380 [2021-06-05 15:57:32,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:57:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29380 states. [2021-06-05 15:57:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29380 to 21760. [2021-06-05 15:57:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21760 states, 21759 states have (on average 4.339078082632474) internal successors, (94414), 21759 states have internal predecessors, (94414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21760 states to 21760 states and 94414 transitions. [2021-06-05 15:57:32,750 INFO L78 Accepts]: Start accepts. Automaton has 21760 states and 94414 transitions. Word has length 34 [2021-06-05 15:57:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:32,751 INFO L482 AbstractCegarLoop]: Abstraction has 21760 states and 94414 transitions. [2021-06-05 15:57:32,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 21760 states and 94414 transitions. [2021-06-05 15:57:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:57:32,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:32,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:32,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:32,991 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1360942373, now seen corresponding path program 25 times [2021-06-05 15:57:32,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:32,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770029731] [2021-06-05 15:57:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:33,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:33,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770029731] [2021-06-05 15:57:33,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770029731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:33,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503014675] [2021-06-05 15:57:33,066 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:57:33,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:33,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:57:33,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:33,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:33,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:33,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-05 15:57:33,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:57:33,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:57:33,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:33,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:33,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:33,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 15:57:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:33,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503014675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:33,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:33,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:57:33,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525670586] [2021-06-05 15:57:33,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:57:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:57:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:57:33,296 INFO L87 Difference]: Start difference. First operand 21760 states and 94414 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:33,829 INFO L93 Difference]: Finished difference Result 32322 states and 135246 transitions. [2021-06-05 15:57:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:57:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:57:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:34,108 INFO L225 Difference]: With dead ends: 32322 [2021-06-05 15:57:34,108 INFO L226 Difference]: Without dead ends: 32075 [2021-06-05 15:57:34,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:57:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32075 states. [2021-06-05 15:57:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32075 to 22027. [2021-06-05 15:57:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22027 states, 22026 states have (on average 4.337691818759648) internal successors, (95542), 22026 states have internal predecessors, (95542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22027 states to 22027 states and 95542 transitions. [2021-06-05 15:57:34,661 INFO L78 Accepts]: Start accepts. Automaton has 22027 states and 95542 transitions. Word has length 34 [2021-06-05 15:57:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:34,661 INFO L482 AbstractCegarLoop]: Abstraction has 22027 states and 95542 transitions. [2021-06-05 15:57:34,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 22027 states and 95542 transitions. [2021-06-05 15:57:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:57:34,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:34,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:34,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 15:57:34,904 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1393308049, now seen corresponding path program 26 times [2021-06-05 15:57:34,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:34,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886518407] [2021-06-05 15:57:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:57:34,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:34,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886518407] [2021-06-05 15:57:34,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886518407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:34,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267089872] [2021-06-05 15:57:34,937 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:34,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:57:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:57:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:57:35,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267089872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:35,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:35,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 15:57:35,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624207761] [2021-06-05 15:57:35,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:57:35,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:35,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:57:35,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:57:35,043 INFO L87 Difference]: Start difference. First operand 22027 states and 95542 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:35,563 INFO L93 Difference]: Finished difference Result 43342 states and 183730 transitions. [2021-06-05 15:57:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:57:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:57:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:35,717 INFO L225 Difference]: With dead ends: 43342 [2021-06-05 15:57:35,718 INFO L226 Difference]: Without dead ends: 42784 [2021-06-05 15:57:35,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:57:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-06-05 15:57:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 34955. [2021-06-05 15:57:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34955 states, 34954 states have (on average 4.434056188132975) internal successors, (154988), 34954 states have internal predecessors, (154988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34955 states to 34955 states and 154988 transitions. [2021-06-05 15:57:36,601 INFO L78 Accepts]: Start accepts. Automaton has 34955 states and 154988 transitions. Word has length 36 [2021-06-05 15:57:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:36,602 INFO L482 AbstractCegarLoop]: Abstraction has 34955 states and 154988 transitions. [2021-06-05 15:57:36,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 34955 states and 154988 transitions. [2021-06-05 15:57:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:57:36,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:36,670 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:36,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:57:36,873 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 860471134, now seen corresponding path program 6 times [2021-06-05 15:57:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:36,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934941197] [2021-06-05 15:57:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:57:36,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934941197] [2021-06-05 15:57:36,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934941197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119482591] [2021-06-05 15:57:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:36,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:57:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:57:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:57:37,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119482591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:37,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:37,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 15:57:37,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489302932] [2021-06-05 15:57:37,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:57:37,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:57:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:57:37,049 INFO L87 Difference]: Start difference. First operand 34955 states and 154988 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:37,682 INFO L93 Difference]: Finished difference Result 55639 states and 244869 transitions. [2021-06-05 15:57:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:57:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:57:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:37,849 INFO L225 Difference]: With dead ends: 55639 [2021-06-05 15:57:37,850 INFO L226 Difference]: Without dead ends: 54701 [2021-06-05 15:57:37,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:57:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54701 states. [2021-06-05 15:57:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54701 to 49555. [2021-06-05 15:57:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49555 states, 49554 states have (on average 4.447673245348509) internal successors, (220400), 49554 states have internal predecessors, (220400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49555 states to 49555 states and 220400 transitions. [2021-06-05 15:57:39,543 INFO L78 Accepts]: Start accepts. Automaton has 49555 states and 220400 transitions. Word has length 38 [2021-06-05 15:57:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:39,546 INFO L482 AbstractCegarLoop]: Abstraction has 49555 states and 220400 transitions. [2021-06-05 15:57:39,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 49555 states and 220400 transitions. [2021-06-05 15:57:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:57:39,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:39,690 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:57:39,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:39,891 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash -776500820, now seen corresponding path program 7 times [2021-06-05 15:57:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:39,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963137913] [2021-06-05 15:57:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:40,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:40,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963137913] [2021-06-05 15:57:40,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963137913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:40,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932608433] [2021-06-05 15:57:40,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:57:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:40,355 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:57:40,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-06-05 15:57:40,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:40,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:40,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:40,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:3 [2021-06-05 15:57:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:40,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932608433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:40,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:40,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:57:40,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052015137] [2021-06-05 15:57:40,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:57:40,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:57:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:57:40,394 INFO L87 Difference]: Start difference. First operand 49555 states and 220400 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:41,831 INFO L93 Difference]: Finished difference Result 65881 states and 285221 transitions. [2021-06-05 15:57:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:57:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:57:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:42,024 INFO L225 Difference]: With dead ends: 65881 [2021-06-05 15:57:42,024 INFO L226 Difference]: Without dead ends: 64441 [2021-06-05 15:57:42,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:57:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64441 states. [2021-06-05 15:57:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64441 to 50807. [2021-06-05 15:57:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50807 states, 50806 states have (on average 4.431996220918789) internal successors, (225172), 50806 states have internal predecessors, (225172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50807 states to 50807 states and 225172 transitions. [2021-06-05 15:57:43,678 INFO L78 Accepts]: Start accepts. Automaton has 50807 states and 225172 transitions. Word has length 39 [2021-06-05 15:57:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:43,678 INFO L482 AbstractCegarLoop]: Abstraction has 50807 states and 225172 transitions. [2021-06-05 15:57:43,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 50807 states and 225172 transitions. [2021-06-05 15:57:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:57:43,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:43,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:57:44,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:57:44,015 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1317826417, now seen corresponding path program 27 times [2021-06-05 15:57:44,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:44,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789855946] [2021-06-05 15:57:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:44,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789855946] [2021-06-05 15:57:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789855946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617982064] [2021-06-05 15:57:44,143 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:44,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:57:44,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:44,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:57:44,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:44,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:44,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2021-06-05 15:57:44,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:57:44,582 INFO L628 ElimStorePlain]: treesize reduction 122, result has 26.5 percent of original size [2021-06-05 15:57:44,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:44,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:40 [2021-06-05 15:57:44,668 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 27 treesize of output 21 [2021-06-05 15:57:44,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:44,675 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-06-05 15:57:44,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:44,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 15:57:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:44,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617982064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:44,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:44,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:57:44,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169126296] [2021-06-05 15:57:44,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:57:44,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:57:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:57:44,718 INFO L87 Difference]: Start difference. First operand 50807 states and 225172 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:48,006 INFO L93 Difference]: Finished difference Result 149860 states and 639243 transitions. [2021-06-05 15:57:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:57:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:57:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:48,537 INFO L225 Difference]: With dead ends: 149860 [2021-06-05 15:57:48,538 INFO L226 Difference]: Without dead ends: 149387 [2021-06-05 15:57:48,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1140.0ms TimeCoverageRelationStatistics Valid=317, Invalid=2439, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:57:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149387 states. [2021-06-05 15:57:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149387 to 64034. [2021-06-05 15:57:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64034 states, 64033 states have (on average 4.4623709649711865) internal successors, (285739), 64033 states have internal predecessors, (285739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64034 states to 64034 states and 285739 transitions. [2021-06-05 15:57:51,212 INFO L78 Accepts]: Start accepts. Automaton has 64034 states and 285739 transitions. Word has length 39 [2021-06-05 15:57:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:51,212 INFO L482 AbstractCegarLoop]: Abstraction has 64034 states and 285739 transitions. [2021-06-05 15:57:51,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 64034 states and 285739 transitions. [2021-06-05 15:57:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:57:51,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:51,358 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:57:51,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:51,560 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash -559929933, now seen corresponding path program 28 times [2021-06-05 15:57:51,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:51,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502570894] [2021-06-05 15:57:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:51,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502570894] [2021-06-05 15:57:51,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502570894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595733560] [2021-06-05 15:57:51,665 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:51,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:57:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:57:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:52,001 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 48 treesize of output 40 [2021-06-05 15:57:52,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2021-06-05 15:57:52,061 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:57:52,061 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 55 treesize of output 25 [2021-06-05 15:57:52,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:52,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:52,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 15:57:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:52,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595733560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:52,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:52,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:57:52,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046417447] [2021-06-05 15:57:52,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:57:52,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:57:52,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:57:52,096 INFO L87 Difference]: Start difference. First operand 64034 states and 285739 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:57:54,985 INFO L93 Difference]: Finished difference Result 159340 states and 683963 transitions. [2021-06-05 15:57:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:57:54,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:57:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:57:55,560 INFO L225 Difference]: With dead ends: 159340 [2021-06-05 15:57:55,560 INFO L226 Difference]: Without dead ends: 158714 [2021-06-05 15:57:55,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:57:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158714 states. [2021-06-05 15:57:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158714 to 66422. [2021-06-05 15:57:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66422 states, 66421 states have (on average 4.454088315442405) internal successors, (295845), 66421 states have internal predecessors, (295845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66422 states to 66422 states and 295845 transitions. [2021-06-05 15:57:58,497 INFO L78 Accepts]: Start accepts. Automaton has 66422 states and 295845 transitions. Word has length 39 [2021-06-05 15:57:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:57:58,498 INFO L482 AbstractCegarLoop]: Abstraction has 66422 states and 295845 transitions. [2021-06-05 15:57:58,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:57:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 66422 states and 295845 transitions. [2021-06-05 15:57:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:57:58,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:57:58,663 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:57:58,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:58,864 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:57:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:57:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2137237491, now seen corresponding path program 29 times [2021-06-05 15:57:58,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:57:58,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543706324] [2021-06-05 15:57:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:57:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:57:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:58,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:57:58,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543706324] [2021-06-05 15:57:58,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543706324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:58,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058672369] [2021-06-05 15:57:58,982 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:57:59,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:57:59,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:57:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:57:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:57:59,445 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 15:57:59,634 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 45 treesize of output 37 [2021-06-05 15:57:59,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:57:59,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:59,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:57:59,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:61 [2021-06-05 15:57:59,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:57:59,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:57:59,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 100 [2021-06-05 15:57:59,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:57:59,918 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.5 percent of original size [2021-06-05 15:57:59,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:57:59,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:21 [2021-06-05 15:57:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:57:59,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058672369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:57:59,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:57:59,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:57:59,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289843799] [2021-06-05 15:57:59,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:57:59,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:57:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:57:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:57:59,969 INFO L87 Difference]: Start difference. First operand 66422 states and 295845 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:07,875 INFO L93 Difference]: Finished difference Result 236913 states and 996130 transitions. [2021-06-05 15:58:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 15:58:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:58:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:09,206 INFO L225 Difference]: With dead ends: 236913 [2021-06-05 15:58:09,206 INFO L226 Difference]: Without dead ends: 235564 [2021-06-05 15:58:09,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 4975.1ms TimeCoverageRelationStatistics Valid=1751, Invalid=10459, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 15:58:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235564 states. [2021-06-05 15:58:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235564 to 77279. [2021-06-05 15:58:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 4.434625637309455) internal successors, (342699), 77278 states have internal predecessors, (342699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 342699 transitions. [2021-06-05 15:58:13,001 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 342699 transitions. Word has length 39 [2021-06-05 15:58:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:13,001 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 342699 transitions. [2021-06-05 15:58:13,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 342699 transitions. [2021-06-05 15:58:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:58:13,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:13,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:58:13,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-05 15:58:13,986 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:13,987 INFO L82 PathProgramCache]: Analyzing trace with hash -45114829, now seen corresponding path program 30 times [2021-06-05 15:58:13,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:13,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278916876] [2021-06-05 15:58:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:14,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278916876] [2021-06-05 15:58:14,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278916876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536884668] [2021-06-05 15:58:14,100 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:14,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:58:14,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:58:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:14,289 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 37 treesize of output 29 [2021-06-05 15:58:14,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:14,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:14,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:14,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:45 [2021-06-05 15:58:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:14,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 15:58:14,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:58:14,448 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.5 percent of original size [2021-06-05 15:58:14,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:58:14,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-06-05 15:58:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:14,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536884668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:14,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:14,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:58:14,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451723986] [2021-06-05 15:58:14,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:58:14,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:58:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:58:14,508 INFO L87 Difference]: Start difference. First operand 77279 states and 342699 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:19,755 INFO L93 Difference]: Finished difference Result 217776 states and 923556 transitions. [2021-06-05 15:58:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 15:58:19,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:58:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:20,534 INFO L225 Difference]: With dead ends: 217776 [2021-06-05 15:58:20,534 INFO L226 Difference]: Without dead ends: 215775 [2021-06-05 15:58:20,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 2839.6ms TimeCoverageRelationStatistics Valid=1389, Invalid=6443, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:58:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215775 states. [2021-06-05 15:58:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215775 to 78064. [2021-06-05 15:58:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78064 states, 78063 states have (on average 4.445742541280761) internal successors, (347048), 78063 states have internal predecessors, (347048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78064 states to 78064 states and 347048 transitions. [2021-06-05 15:58:24,630 INFO L78 Accepts]: Start accepts. Automaton has 78064 states and 347048 transitions. Word has length 39 [2021-06-05 15:58:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:24,630 INFO L482 AbstractCegarLoop]: Abstraction has 78064 states and 347048 transitions. [2021-06-05 15:58:24,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 78064 states and 347048 transitions. [2021-06-05 15:58:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:58:24,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:24,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:58:24,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:58:24,999 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1382165761, now seen corresponding path program 31 times [2021-06-05 15:58:24,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:24,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233700584] [2021-06-05 15:58:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:25,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233700584] [2021-06-05 15:58:25,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233700584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925905724] [2021-06-05 15:58:25,116 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:58:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:25,322 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:58:25,322 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 36 treesize of output 16 [2021-06-05 15:58:25,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:25,329 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 15:58:25,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:12 [2021-06-05 15:58:25,421 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 27 treesize of output 21 [2021-06-05 15:58:25,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,433 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-06-05 15:58:25,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:25,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 15:58:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:25,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925905724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:25,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:25,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:58:25,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849109437] [2021-06-05 15:58:25,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:58:25,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:58:25,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:58:25,464 INFO L87 Difference]: Start difference. First operand 78064 states and 347048 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:27,589 INFO L93 Difference]: Finished difference Result 128954 states and 559651 transitions. [2021-06-05 15:58:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:58:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:58:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:28,511 INFO L225 Difference]: With dead ends: 128954 [2021-06-05 15:58:28,511 INFO L226 Difference]: Without dead ends: 128528 [2021-06-05 15:58:28,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:58:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128528 states. [2021-06-05 15:58:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128528 to 78044. [2021-06-05 15:58:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78044 states, 78043 states have (on average 4.4453186064092876) internal successors, (346926), 78043 states have internal predecessors, (346926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78044 states to 78044 states and 346926 transitions. [2021-06-05 15:58:31,400 INFO L78 Accepts]: Start accepts. Automaton has 78044 states and 346926 transitions. Word has length 39 [2021-06-05 15:58:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:31,401 INFO L482 AbstractCegarLoop]: Abstraction has 78044 states and 346926 transitions. [2021-06-05 15:58:31,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 78044 states and 346926 transitions. [2021-06-05 15:58:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:58:31,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:31,689 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:58:31,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:58:31,905 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 388518517, now seen corresponding path program 32 times [2021-06-05 15:58:31,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:31,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907865971] [2021-06-05 15:58:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:32,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907865971] [2021-06-05 15:58:32,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907865971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859241872] [2021-06-05 15:58:32,022 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:32,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:58:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:58:32,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:32,301 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 48 treesize of output 40 [2021-06-05 15:58:32,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:32,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:32,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:32,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2021-06-05 15:58:32,347 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:58:32,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 15:58:32,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:32,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:32,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:32,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 15:58:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:32,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859241872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:32,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:32,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:58:32,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418333881] [2021-06-05 15:58:32,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:58:32,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:58:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:58:32,374 INFO L87 Difference]: Start difference. First operand 78044 states and 346926 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:34,858 INFO L93 Difference]: Finished difference Result 175625 states and 758274 transitions. [2021-06-05 15:58:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:58:34,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:58:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:35,434 INFO L225 Difference]: With dead ends: 175625 [2021-06-05 15:58:35,434 INFO L226 Difference]: Without dead ends: 175138 [2021-06-05 15:58:35,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:58:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175138 states. [2021-06-05 15:58:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175138 to 80706. [2021-06-05 15:58:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80706 states, 80705 states have (on average 4.441397682919274) internal successors, (358443), 80705 states have internal predecessors, (358443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80706 states to 80706 states and 358443 transitions. [2021-06-05 15:58:39,303 INFO L78 Accepts]: Start accepts. Automaton has 80706 states and 358443 transitions. Word has length 39 [2021-06-05 15:58:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:39,303 INFO L482 AbstractCegarLoop]: Abstraction has 80706 states and 358443 transitions. [2021-06-05 15:58:39,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 80706 states and 358443 transitions. [2021-06-05 15:58:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:58:39,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:39,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:58:39,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:39,703 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash -804505687, now seen corresponding path program 33 times [2021-06-05 15:58:39,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:39,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785856662] [2021-06-05 15:58:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:39,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785856662] [2021-06-05 15:58:39,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785856662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657183080] [2021-06-05 15:58:39,810 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:39,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:58:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:58:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:40,156 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-05 15:58:40,157 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 65 treesize of output 87 [2021-06-05 15:58:40,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 15:58:40,324 INFO L628 ElimStorePlain]: treesize reduction 288, result has 12.7 percent of original size [2021-06-05 15:58:40,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:58:40,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:30 [2021-06-05 15:58:40,424 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 27 treesize of output 21 [2021-06-05 15:58:40,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:40,431 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-06-05 15:58:40,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:40,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 15:58:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:40,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657183080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:40,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:40,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:58:40,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783332046] [2021-06-05 15:58:40,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:58:40,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:58:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:58:40,460 INFO L87 Difference]: Start difference. First operand 80706 states and 358443 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:41,798 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-06-05 15:58:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:44,707 INFO L93 Difference]: Finished difference Result 183461 states and 788528 transitions. [2021-06-05 15:58:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:58:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:58:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:46,152 INFO L225 Difference]: With dead ends: 183461 [2021-06-05 15:58:46,153 INFO L226 Difference]: Without dead ends: 183092 [2021-06-05 15:58:46,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1992.4ms TimeCoverageRelationStatistics Valid=448, Invalid=3212, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:58:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183092 states. [2021-06-05 15:58:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183092 to 86084. [2021-06-05 15:58:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86084 states, 86083 states have (on average 4.445477039601315) internal successors, (382680), 86083 states have internal predecessors, (382680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86084 states to 86084 states and 382680 transitions. [2021-06-05 15:58:49,816 INFO L78 Accepts]: Start accepts. Automaton has 86084 states and 382680 transitions. Word has length 39 [2021-06-05 15:58:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:49,816 INFO L482 AbstractCegarLoop]: Abstraction has 86084 states and 382680 transitions. [2021-06-05 15:58:49,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 86084 states and 382680 transitions. [2021-06-05 15:58:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:58:50,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:50,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:58:50,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:58:50,200 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1612705259, now seen corresponding path program 34 times [2021-06-05 15:58:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:50,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734187712] [2021-06-05 15:58:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:50,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:50,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734187712] [2021-06-05 15:58:50,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734187712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:50,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595319838] [2021-06-05 15:58:50,331 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:50,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:58:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:50,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:58:50,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:50,575 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 48 treesize of output 40 [2021-06-05 15:58:50,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:50,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:50,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:50,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2021-06-05 15:58:50,620 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:58:50,620 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 55 treesize of output 25 [2021-06-05 15:58:50,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:50,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:50,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:50,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 15:58:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:50,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595319838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:50,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:50,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:58:50,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416882673] [2021-06-05 15:58:50,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:58:50,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:50,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:58:50,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:58:50,645 INFO L87 Difference]: Start difference. First operand 86084 states and 382680 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:58:53,512 INFO L93 Difference]: Finished difference Result 162770 states and 705968 transitions. [2021-06-05 15:58:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:58:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:58:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:58:54,093 INFO L225 Difference]: With dead ends: 162770 [2021-06-05 15:58:54,093 INFO L226 Difference]: Without dead ends: 162511 [2021-06-05 15:58:54,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:58:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162511 states. [2021-06-05 15:58:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162511 to 85089. [2021-06-05 15:58:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85089 states, 85088 states have (on average 4.4406614328695) internal successors, (377847), 85088 states have internal predecessors, (377847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85089 states to 85089 states and 377847 transitions. [2021-06-05 15:58:57,254 INFO L78 Accepts]: Start accepts. Automaton has 85089 states and 377847 transitions. Word has length 39 [2021-06-05 15:58:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:58:57,255 INFO L482 AbstractCegarLoop]: Abstraction has 85089 states and 377847 transitions. [2021-06-05 15:58:57,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:58:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 85089 states and 377847 transitions. [2021-06-05 15:58:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:58:57,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:58:57,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:58:57,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:57,644 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:58:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:58:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash 14905387, now seen corresponding path program 35 times [2021-06-05 15:58:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:58:57,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213082821] [2021-06-05 15:58:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:58:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:58:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:57,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:58:57,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213082821] [2021-06-05 15:58:57,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213082821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:57,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422967524] [2021-06-05 15:58:57,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:58:57,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:58:57,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:58:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:58:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:58:58,608 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 47 treesize of output 31 [2021-06-05 15:58:58,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:58,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:58,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:58:58,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:79, output treesize:56 [2021-06-05 15:58:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:58,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:58:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:58:58,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:58:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 25 [2021-06-05 15:58:58,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:58:58,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:58:58,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:58:58,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:82, output treesize:3 [2021-06-05 15:58:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:58:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422967524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:58:58,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:58:58,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:58:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634088097] [2021-06-05 15:58:58,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:58:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:58:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:58:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:58:58,806 INFO L87 Difference]: Start difference. First operand 85089 states and 377847 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:03,296 INFO L93 Difference]: Finished difference Result 174347 states and 749702 transitions. [2021-06-05 15:59:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:59:03,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:03,880 INFO L225 Difference]: With dead ends: 174347 [2021-06-05 15:59:03,880 INFO L226 Difference]: Without dead ends: 173645 [2021-06-05 15:59:03,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1764.7ms TimeCoverageRelationStatistics Valid=489, Invalid=3543, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:59:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173645 states. [2021-06-05 15:59:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173645 to 84941. [2021-06-05 15:59:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84941 states, 84940 states have (on average 4.44385448551919) internal successors, (377461), 84940 states have internal predecessors, (377461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84941 states to 84941 states and 377461 transitions. [2021-06-05 15:59:07,764 INFO L78 Accepts]: Start accepts. Automaton has 84941 states and 377461 transitions. Word has length 39 [2021-06-05 15:59:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:07,764 INFO L482 AbstractCegarLoop]: Abstraction has 84941 states and 377461 transitions. [2021-06-05 15:59:07,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84941 states and 377461 transitions. [2021-06-05 15:59:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:59:07,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:07,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:59:08,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:08,162 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2127520363, now seen corresponding path program 36 times [2021-06-05 15:59:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:08,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108938415] [2021-06-05 15:59:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:08,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:08,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108938415] [2021-06-05 15:59:08,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108938415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:08,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993662622] [2021-06-05 15:59:08,280 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:08,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:59:08,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:08,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:59:08,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:08,467 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 37 treesize of output 29 [2021-06-05 15:59:08,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:08,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:08,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:08,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:50 [2021-06-05 15:59:08,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:08,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 85 [2021-06-05 15:59:08,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:59:08,667 INFO L628 ElimStorePlain]: treesize reduction 17, result has 62.2 percent of original size [2021-06-05 15:59:08,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:08,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:26 [2021-06-05 15:59:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993662622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:08,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:08,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:59:08,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753496485] [2021-06-05 15:59:08,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:59:08,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:59:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:59:08,719 INFO L87 Difference]: Start difference. First operand 84941 states and 377461 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:12,688 INFO L93 Difference]: Finished difference Result 182711 states and 782395 transitions. [2021-06-05 15:59:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:59:12,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:13,351 INFO L225 Difference]: With dead ends: 182711 [2021-06-05 15:59:13,351 INFO L226 Difference]: Without dead ends: 181880 [2021-06-05 15:59:13,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1551.6ms TimeCoverageRelationStatistics Valid=612, Invalid=3170, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:59:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181880 states. [2021-06-05 15:59:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181880 to 83759. [2021-06-05 15:59:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83759 states, 83758 states have (on average 4.44780200100289) internal successors, (372539), 83758 states have internal predecessors, (372539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83759 states to 83759 states and 372539 transitions. [2021-06-05 15:59:16,482 INFO L78 Accepts]: Start accepts. Automaton has 83759 states and 372539 transitions. Word has length 39 [2021-06-05 15:59:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:16,482 INFO L482 AbstractCegarLoop]: Abstraction has 83759 states and 372539 transitions. [2021-06-05 15:59:16,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 83759 states and 372539 transitions. [2021-06-05 15:59:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:59:16,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:16,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:59:16,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 15:59:16,864 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1749736931, now seen corresponding path program 37 times [2021-06-05 15:59:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930230815] [2021-06-05 15:59:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:16,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:16,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930230815] [2021-06-05 15:59:16,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930230815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:16,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598777902] [2021-06-05 15:59:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:59:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:17,613 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 15:59:17,717 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:59:17,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-06-05 15:59:17,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:17,727 INFO L628 ElimStorePlain]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 15:59:17,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:17,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:13 [2021-06-05 15:59:17,780 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 15:59:17,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:17,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:17,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:17,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-06-05 15:59:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:17,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598777902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:17,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:17,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:59:17,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766348257] [2021-06-05 15:59:17,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:59:17,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:59:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:59:17,814 INFO L87 Difference]: Start difference. First operand 83759 states and 372539 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:20,730 INFO L93 Difference]: Finished difference Result 160061 states and 694172 transitions. [2021-06-05 15:59:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:59:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:21,288 INFO L225 Difference]: With dead ends: 160061 [2021-06-05 15:59:21,288 INFO L226 Difference]: Without dead ends: 159531 [2021-06-05 15:59:21,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1175.2ms TimeCoverageRelationStatistics Valid=308, Invalid=1948, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:59:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159531 states. [2021-06-05 15:59:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159531 to 88396. [2021-06-05 15:59:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88396 states, 88395 states have (on average 4.452197522484304) internal successors, (393552), 88395 states have internal predecessors, (393552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88396 states to 88396 states and 393552 transitions. [2021-06-05 15:59:24,795 INFO L78 Accepts]: Start accepts. Automaton has 88396 states and 393552 transitions. Word has length 39 [2021-06-05 15:59:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:24,795 INFO L482 AbstractCegarLoop]: Abstraction has 88396 states and 393552 transitions. [2021-06-05 15:59:24,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 88396 states and 393552 transitions. [2021-06-05 15:59:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:59:24,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:24,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:59:25,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 15:59:25,197 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1590092395, now seen corresponding path program 38 times [2021-06-05 15:59:25,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:25,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481719259] [2021-06-05 15:59:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:25,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481719259] [2021-06-05 15:59:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481719259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383738184] [2021-06-05 15:59:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:25,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:59:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:26,156 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 48 treesize of output 40 [2021-06-05 15:59:26,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:26,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:26,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:26,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2021-06-05 15:59:26,210 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:59:26,211 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 55 treesize of output 25 [2021-06-05 15:59:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:26,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:26,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:26,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 15:59:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:26,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383738184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:26,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:26,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:59:26,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258996400] [2021-06-05 15:59:26,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:59:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:59:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:59:26,241 INFO L87 Difference]: Start difference. First operand 88396 states and 393552 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:28,850 INFO L93 Difference]: Finished difference Result 157498 states and 685117 transitions. [2021-06-05 15:59:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:59:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:29,407 INFO L225 Difference]: With dead ends: 157498 [2021-06-05 15:59:29,407 INFO L226 Difference]: Without dead ends: 156944 [2021-06-05 15:59:29,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 979.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1612, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:59:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156944 states. [2021-06-05 15:59:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156944 to 87428. [2021-06-05 15:59:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87428 states, 87427 states have (on average 4.449632264632207) internal successors, (389018), 87427 states have internal predecessors, (389018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87428 states to 87428 states and 389018 transitions. [2021-06-05 15:59:32,660 INFO L78 Accepts]: Start accepts. Automaton has 87428 states and 389018 transitions. Word has length 39 [2021-06-05 15:59:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:32,660 INFO L482 AbstractCegarLoop]: Abstraction has 87428 states and 389018 transitions. [2021-06-05 15:59:32,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 87428 states and 389018 transitions. [2021-06-05 15:59:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:59:32,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:32,853 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:59:33,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 15:59:33,054 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash -550484735, now seen corresponding path program 39 times [2021-06-05 15:59:33,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:33,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445407612] [2021-06-05 15:59:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:33,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:33,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445407612] [2021-06-05 15:59:33,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445407612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:33,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410667510] [2021-06-05 15:59:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:33,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:59:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:59:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:33,434 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 28 treesize of output 20 [2021-06-05 15:59:33,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:33,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:33,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:33,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:36 [2021-06-05 15:59:33,505 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 15:59:33,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 25 [2021-06-05 15:59:33,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:33,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:33,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:33,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:3 [2021-06-05 15:59:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:34,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410667510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:34,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:34,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:59:34,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750499671] [2021-06-05 15:59:34,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:59:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:59:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:59:34,036 INFO L87 Difference]: Start difference. First operand 87428 states and 389018 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:36,832 INFO L93 Difference]: Finished difference Result 162261 states and 705260 transitions. [2021-06-05 15:59:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:59:36,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:37,432 INFO L225 Difference]: With dead ends: 162261 [2021-06-05 15:59:37,433 INFO L226 Difference]: Without dead ends: 161815 [2021-06-05 15:59:37,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1497.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:59:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161815 states. [2021-06-05 15:59:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161815 to 88925. [2021-06-05 15:59:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88925 states, 88924 states have (on average 4.448888938869147) internal successors, (395613), 88924 states have internal predecessors, (395613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88925 states to 88925 states and 395613 transitions. [2021-06-05 15:59:40,636 INFO L78 Accepts]: Start accepts. Automaton has 88925 states and 395613 transitions. Word has length 39 [2021-06-05 15:59:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:40,636 INFO L482 AbstractCegarLoop]: Abstraction has 88925 states and 395613 transitions. [2021-06-05 15:59:40,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 88925 states and 395613 transitions. [2021-06-05 15:59:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:59:40,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:40,832 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:59:41,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:41,033 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 881630891, now seen corresponding path program 40 times [2021-06-05 15:59:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:41,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231991756] [2021-06-05 15:59:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:41,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:41,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231991756] [2021-06-05 15:59:41,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231991756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:41,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865934887] [2021-06-05 15:59:41,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:41,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:41,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:59:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:41,354 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 43 treesize of output 35 [2021-06-05 15:59:41,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:47 [2021-06-05 15:59:41,423 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:59:41,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 15:59:41,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:41,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:41,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 15:59:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:41,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865934887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:41,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:41,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:59:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973458958] [2021-06-05 15:59:41,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:59:41,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:59:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:59:41,909 INFO L87 Difference]: Start difference. First operand 88925 states and 395613 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:44,596 INFO L93 Difference]: Finished difference Result 159429 states and 689252 transitions. [2021-06-05 15:59:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:59:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:45,162 INFO L225 Difference]: With dead ends: 159429 [2021-06-05 15:59:45,162 INFO L226 Difference]: Without dead ends: 158708 [2021-06-05 15:59:45,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1505.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:59:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158708 states. [2021-06-05 15:59:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158708 to 91673. [2021-06-05 15:59:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91673 states, 91672 states have (on average 4.450901038485034) internal successors, (408023), 91672 states have internal predecessors, (408023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91673 states to 91673 states and 408023 transitions. [2021-06-05 15:59:48,431 INFO L78 Accepts]: Start accepts. Automaton has 91673 states and 408023 transitions. Word has length 39 [2021-06-05 15:59:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:48,431 INFO L482 AbstractCegarLoop]: Abstraction has 91673 states and 408023 transitions. [2021-06-05 15:59:48,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:48,432 INFO L276 IsEmpty]: Start isEmpty. Operand 91673 states and 408023 transitions. [2021-06-05 15:59:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:59:48,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:48,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 15:59:48,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:48,853 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 151841409, now seen corresponding path program 41 times [2021-06-05 15:59:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174332856] [2021-06-05 15:59:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:48,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:48,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174332856] [2021-06-05 15:59:48,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174332856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:48,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218613467] [2021-06-05 15:59:48,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:49,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:59:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:59:49,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:49,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 15:59:49,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:49,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:49,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:59:49,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2021-06-05 15:59:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:59:49,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 98 [2021-06-05 15:59:49,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:59:50,000 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-06-05 15:59:50,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:59:50,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:15 [2021-06-05 15:59:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218613467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:50,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:50,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:59:50,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716559570] [2021-06-05 15:59:50,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:59:50,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:59:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:59:50,061 INFO L87 Difference]: Start difference. First operand 91673 states and 408023 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:53,402 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-06-05 15:59:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:58,296 INFO L93 Difference]: Finished difference Result 337062 states and 1444897 transitions. [2021-06-05 15:59:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 15:59:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:59:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:59,642 INFO L225 Difference]: With dead ends: 337062 [2021-06-05 15:59:59,643 INFO L226 Difference]: Without dead ends: 334180 [2021-06-05 15:59:59,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3900 ImplicationChecksByTransitivity, 5052.4ms TimeCoverageRelationStatistics Valid=1708, Invalid=10064, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 16:00:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334180 states. [2021-06-05 16:00:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334180 to 124244. [2021-06-05 16:00:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124244 states, 124243 states have (on average 4.48249800793606) internal successors, (556919), 124243 states have internal predecessors, (556919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124244 states to 124244 states and 556919 transitions. [2021-06-05 16:00:07,630 INFO L78 Accepts]: Start accepts. Automaton has 124244 states and 556919 transitions. Word has length 39 [2021-06-05 16:00:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:07,630 INFO L482 AbstractCegarLoop]: Abstraction has 124244 states and 556919 transitions. [2021-06-05 16:00:07,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 124244 states and 556919 transitions. [2021-06-05 16:00:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:00:07,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:07,967 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:00:08,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 16:00:08,181 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash 777400321, now seen corresponding path program 42 times [2021-06-05 16:00:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:08,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982759615] [2021-06-05 16:00:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:08,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:08,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982759615] [2021-06-05 16:00:08,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982759615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:08,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517835529] [2021-06-05 16:00:08,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:08,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:00:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:00:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:08,511 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 16:00:08,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:08,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:08,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:08,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-06-05 16:00:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:00:08,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:08,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 79 [2021-06-05 16:00:08,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:00:08,829 INFO L628 ElimStorePlain]: treesize reduction 52, result has 46.4 percent of original size [2021-06-05 16:00:08,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:00:08,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:89, output treesize:33 [2021-06-05 16:00:08,889 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 16:00:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517835529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:08,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:08,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 16:00:08,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698501097] [2021-06-05 16:00:08,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:00:08,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:00:08,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:00:08,890 INFO L87 Difference]: Start difference. First operand 124244 states and 556919 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:11,421 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 16:00:13,757 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 16:00:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:16,226 INFO L93 Difference]: Finished difference Result 295018 states and 1285677 transitions. [2021-06-05 16:00:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:00:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:00:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:17,413 INFO L225 Difference]: With dead ends: 295018 [2021-06-05 16:00:17,413 INFO L226 Difference]: Without dead ends: 293959 [2021-06-05 16:00:17,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 4165.0ms TimeCoverageRelationStatistics Valid=1149, Invalid=5171, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 16:00:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293959 states. [2021-06-05 16:00:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293959 to 130552. [2021-06-05 16:00:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130552 states, 130551 states have (on average 4.489057916063454) internal successors, (586051), 130551 states have internal predecessors, (586051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130552 states to 130552 states and 586051 transitions. [2021-06-05 16:00:23,855 INFO L78 Accepts]: Start accepts. Automaton has 130552 states and 586051 transitions. Word has length 39 [2021-06-05 16:00:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:23,855 INFO L482 AbstractCegarLoop]: Abstraction has 130552 states and 586051 transitions. [2021-06-05 16:00:23,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 130552 states and 586051 transitions. [2021-06-05 16:00:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:00:24,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:24,158 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:00:24,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 16:00:24,361 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -582105991, now seen corresponding path program 43 times [2021-06-05 16:00:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:24,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728687286] [2021-06-05 16:00:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:24,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728687286] [2021-06-05 16:00:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728687286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154769233] [2021-06-05 16:00:24,484 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 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 16:00:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:00:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:24,660 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 16:00:24,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:24,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:24,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:24,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-06-05 16:00:24,823 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:00:24,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:00:24,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:24,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:24,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:24,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:00:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:24,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154769233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:24,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:24,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:00:24,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572195699] [2021-06-05 16:00:24,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:00:24,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:00:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:00:24,860 INFO L87 Difference]: Start difference. First operand 130552 states and 586051 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:28,402 INFO L93 Difference]: Finished difference Result 222429 states and 966854 transitions. [2021-06-05 16:00:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:00:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:00:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:29,275 INFO L225 Difference]: With dead ends: 222429 [2021-06-05 16:00:29,276 INFO L226 Difference]: Without dead ends: 221816 [2021-06-05 16:00:29,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:00:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221816 states. [2021-06-05 16:00:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221816 to 130608. [2021-06-05 16:00:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130608 states, 130607 states have (on average 4.489491374888023) internal successors, (586359), 130607 states have internal predecessors, (586359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130608 states to 130608 states and 586359 transitions. [2021-06-05 16:00:34,623 INFO L78 Accepts]: Start accepts. Automaton has 130608 states and 586359 transitions. Word has length 39 [2021-06-05 16:00:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:34,624 INFO L482 AbstractCegarLoop]: Abstraction has 130608 states and 586359 transitions. [2021-06-05 16:00:34,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 130608 states and 586359 transitions. [2021-06-05 16:00:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:00:35,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:35,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:00:35,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 16:00:35,999 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1322795675, now seen corresponding path program 44 times [2021-06-05 16:00:36,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:36,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426893917] [2021-06-05 16:00:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:36,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426893917] [2021-06-05 16:00:36,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426893917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968481963] [2021-06-05 16:00:36,099 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 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 16:00:36,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:00:36,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:00:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:36,324 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:00:36,325 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 67 treesize of output 37 [2021-06-05 16:00:36,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:36,333 INFO L628 ElimStorePlain]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:00:36,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:36,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:13 [2021-06-05 16:00:36,374 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 16:00:36,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:00:36,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:00:36,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:00:36,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-06-05 16:00:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:00:36,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968481963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:36,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:36,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:00:36,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090021017] [2021-06-05 16:00:36,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:00:36,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:36,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:00:36,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:00:36,392 INFO L87 Difference]: Start difference. First operand 130608 states and 586359 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:39,075 INFO L93 Difference]: Finished difference Result 189249 states and 829490 transitions. [2021-06-05 16:00:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:00:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:00:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:39,777 INFO L225 Difference]: With dead ends: 189249 [2021-06-05 16:00:39,777 INFO L226 Difference]: Without dead ends: 188752 [2021-06-05 16:00:39,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:00:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188752 states. [2021-06-05 16:00:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188752 to 133213. [2021-06-05 16:00:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133213 states, 133212 states have (on average 4.494114644326337) internal successors, (598670), 133212 states have internal predecessors, (598670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133213 states to 133213 states and 598670 transitions. [2021-06-05 16:00:44,527 INFO L78 Accepts]: Start accepts. Automaton has 133213 states and 598670 transitions. Word has length 39 [2021-06-05 16:00:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:44,528 INFO L482 AbstractCegarLoop]: Abstraction has 133213 states and 598670 transitions. [2021-06-05 16:00:44,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 133213 states and 598670 transitions. [2021-06-05 16:00:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:00:45,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:45,521 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-06-05 16:00:45,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:00:45,733 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1071116294, now seen corresponding path program 45 times [2021-06-05 16:00:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:45,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513082935] [2021-06-05 16:00:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 16:00:45,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:45,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513082935] [2021-06-05 16:00:45,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513082935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:45,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606527366] [2021-06-05 16:00:45,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:00:45,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:00:45,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:00:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 16:00:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606527366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:45,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:45,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 16:00:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227799603] [2021-06-05 16:00:45,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:00:45,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:00:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:00:45,882 INFO L87 Difference]: Start difference. First operand 133213 states and 598670 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 16:00:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:00:48,450 INFO L93 Difference]: Finished difference Result 316715 states and 1360553 transitions. [2021-06-05 16:00:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:00:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 39 [2021-06-05 16:00:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:00:50,428 INFO L225 Difference]: With dead ends: 316715 [2021-06-05 16:00:50,429 INFO L226 Difference]: Without dead ends: 315898 [2021-06-05 16:00:50,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:00:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315898 states. [2021-06-05 16:00:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315898 to 180538. [2021-06-05 16:00:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180538 states, 180537 states have (on average 4.647911508444253) internal successors, (839120), 180537 states have internal predecessors, (839120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:00:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180538 states to 180538 states and 839120 transitions. [2021-06-05 16:00:58,785 INFO L78 Accepts]: Start accepts. Automaton has 180538 states and 839120 transitions. Word has length 39 [2021-06-05 16:00:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:00:58,785 INFO L482 AbstractCegarLoop]: Abstraction has 180538 states and 839120 transitions. [2021-06-05 16:00:58,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 16:00:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 180538 states and 839120 transitions. [2021-06-05 16:00:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:00:59,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:00:59,264 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-06-05 16:00:59,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 16:00:59,465 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:00:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:00:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 956369926, now seen corresponding path program 46 times [2021-06-05 16:00:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:00:59,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975174094] [2021-06-05 16:00:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:00:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:00:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:00:59,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:00:59,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975174094] [2021-06-05 16:00:59,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975174094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:59,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986897255] [2021-06-05 16:00:59,488 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 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 16:00:59,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:00:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:00:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:00:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:00:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:00:59,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986897255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:00:59,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:00:59,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 16:00:59,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803019589] [2021-06-05 16:00:59,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:00:59,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:00:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:00:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:00:59,632 INFO L87 Difference]: Start difference. First operand 180538 states and 839120 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:04,156 INFO L93 Difference]: Finished difference Result 381094 states and 1644024 transitions. [2021-06-05 16:01:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:01:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:01:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:06,862 INFO L225 Difference]: With dead ends: 381094 [2021-06-05 16:01:06,863 INFO L226 Difference]: Without dead ends: 372501 [2021-06-05 16:01:06,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:01:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372501 states. [2021-06-05 16:01:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372501 to 194112. [2021-06-05 16:01:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194112 states, 194111 states have (on average 4.636460581832044) internal successors, (899988), 194111 states have internal predecessors, (899988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194112 states to 194112 states and 899988 transitions. [2021-06-05 16:01:16,153 INFO L78 Accepts]: Start accepts. Automaton has 194112 states and 899988 transitions. Word has length 39 [2021-06-05 16:01:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:16,154 INFO L482 AbstractCegarLoop]: Abstraction has 194112 states and 899988 transitions. [2021-06-05 16:01:16,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 194112 states and 899988 transitions. [2021-06-05 16:01:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:01:16,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:16,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:01:16,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 16:01:16,853 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1975849083, now seen corresponding path program 47 times [2021-06-05 16:01:16,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:16,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381148340] [2021-06-05 16:01:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:16,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381148340] [2021-06-05 16:01:16,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381148340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028450655] [2021-06-05 16:01:16,960 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 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 16:01:16,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:01:17,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:01:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:18,081 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:01:18,082 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 55 treesize of output 23 [2021-06-05 16:01:18,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:18,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:18,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:18,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:15 [2021-06-05 16:01:18,141 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 27 treesize of output 21 [2021-06-05 16:01:18,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:18,149 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-06-05 16:01:18,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:18,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 16:01:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:18,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028450655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:18,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:18,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:01:18,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520797258] [2021-06-05 16:01:18,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:01:18,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:01:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:01:18,179 INFO L87 Difference]: Start difference. First operand 194112 states and 899988 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:21,931 INFO L93 Difference]: Finished difference Result 320847 states and 1457866 transitions. [2021-06-05 16:01:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:01:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:01:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:23,480 INFO L225 Difference]: With dead ends: 320847 [2021-06-05 16:01:23,480 INFO L226 Difference]: Without dead ends: 320263 [2021-06-05 16:01:23,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1325.8ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:01:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320263 states. [2021-06-05 16:01:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320263 to 209402. [2021-06-05 16:01:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209402 states, 209401 states have (on average 4.637623507051065) internal successors, (971123), 209401 states have internal predecessors, (971123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209402 states to 209402 states and 971123 transitions. [2021-06-05 16:01:32,484 INFO L78 Accepts]: Start accepts. Automaton has 209402 states and 971123 transitions. Word has length 39 [2021-06-05 16:01:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:32,485 INFO L482 AbstractCegarLoop]: Abstraction has 209402 states and 971123 transitions. [2021-06-05 16:01:32,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 209402 states and 971123 transitions. [2021-06-05 16:01:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:01:33,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:33,009 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:01:33,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:33,209 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 98092733, now seen corresponding path program 48 times [2021-06-05 16:01:33,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:33,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280092346] [2021-06-05 16:01:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:33,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:33,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280092346] [2021-06-05 16:01:33,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280092346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:33,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433980829] [2021-06-05 16:01:33,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:01:33,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:01:33,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:01:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:33,639 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 28 treesize of output 24 [2021-06-05 16:01:33,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:33,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:33,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:33,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 16:01:34,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:01:34,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:34,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 69 [2021-06-05 16:01:34,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:34,503 INFO L628 ElimStorePlain]: treesize reduction 19, result has 59.6 percent of original size [2021-06-05 16:01:34,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:01:34,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:26 [2021-06-05 16:01:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:34,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433980829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:34,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:34,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 16:01:34,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991469808] [2021-06-05 16:01:34,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:01:34,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:34,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:01:34,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:01:34,554 INFO L87 Difference]: Start difference. First operand 209402 states and 971123 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:39,301 INFO L93 Difference]: Finished difference Result 355326 states and 1610530 transitions. [2021-06-05 16:01:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:01:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:01:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:41,575 INFO L225 Difference]: With dead ends: 355326 [2021-06-05 16:01:41,575 INFO L226 Difference]: Without dead ends: 354844 [2021-06-05 16:01:41,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1097.9ms TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:01:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354844 states. [2021-06-05 16:01:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354844 to 214143. [2021-06-05 16:01:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214143 states, 214142 states have (on average 4.652221423167805) internal successors, (996236), 214142 states have internal predecessors, (996236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214143 states to 214143 states and 996236 transitions. [2021-06-05 16:01:50,791 INFO L78 Accepts]: Start accepts. Automaton has 214143 states and 996236 transitions. Word has length 39 [2021-06-05 16:01:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:50,791 INFO L482 AbstractCegarLoop]: Abstraction has 214143 states and 996236 transitions. [2021-06-05 16:01:50,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 214143 states and 996236 transitions. [2021-06-05 16:01:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:01:52,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:52,100 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:01:52,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:52,301 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1499707139, now seen corresponding path program 49 times [2021-06-05 16:01:52,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:52,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359980892] [2021-06-05 16:01:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:52,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:52,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359980892] [2021-06-05 16:01:52,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359980892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:52,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631269197] [2021-06-05 16:01:52,422 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 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 16:01:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:01:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:52,680 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 43 treesize of output 35 [2021-06-05 16:01:52,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:47 [2021-06-05 16:01:52,751 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:01:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:01:52,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:52,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:52,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:01:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631269197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:52,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:52,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:01:52,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893042178] [2021-06-05 16:01:52,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:01:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:52,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:01:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:01:52,786 INFO L87 Difference]: Start difference. First operand 214143 states and 996236 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:57,093 INFO L93 Difference]: Finished difference Result 358853 states and 1624029 transitions. [2021-06-05 16:01:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:01:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:01:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:59,447 INFO L225 Difference]: With dead ends: 358853 [2021-06-05 16:01:59,447 INFO L226 Difference]: Without dead ends: 358480 [2021-06-05 16:01:59,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 729.1ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:01:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358480 states. [2021-06-05 16:02:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358480 to 218687. [2021-06-05 16:02:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218687 states, 218686 states have (on average 4.647810102155602) internal successors, (1016411), 218686 states have internal predecessors, (1016411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218687 states to 218687 states and 1016411 transitions. [2021-06-05 16:02:10,779 INFO L78 Accepts]: Start accepts. Automaton has 218687 states and 1016411 transitions. Word has length 39 [2021-06-05 16:02:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:10,779 INFO L482 AbstractCegarLoop]: Abstraction has 218687 states and 1016411 transitions. [2021-06-05 16:02:10,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 218687 states and 1016411 transitions. [2021-06-05 16:02:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:02:11,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:11,468 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:02:11,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:11,690 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 612907837, now seen corresponding path program 50 times [2021-06-05 16:02:11,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:11,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855363273] [2021-06-05 16:02:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:11,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855363273] [2021-06-05 16:02:11,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855363273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686480840] [2021-06-05 16:02:11,805 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 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 16:02:11,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:02:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:11,986 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 37 treesize of output 29 [2021-06-05 16:02:11,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:11,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:11,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:11,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:45 [2021-06-05 16:02:12,095 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:02:12,095 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 55 treesize of output 25 [2021-06-05 16:02:12,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:12,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:12,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:02:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:12,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686480840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:12,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:12,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:02:12,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536858154] [2021-06-05 16:02:12,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:02:12,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:12,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:02:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:02:12,129 INFO L87 Difference]: Start difference. First operand 218687 states and 1016411 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:16,439 INFO L93 Difference]: Finished difference Result 365493 states and 1652210 transitions. [2021-06-05 16:02:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:02:16,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:02:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:18,848 INFO L225 Difference]: With dead ends: 365493 [2021-06-05 16:02:18,848 INFO L226 Difference]: Without dead ends: 364804 [2021-06-05 16:02:18,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 743.7ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:02:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364804 states. [2021-06-05 16:02:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364804 to 217457. [2021-06-05 16:02:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217457 states, 217456 states have (on average 4.650683356633066) internal successors, (1011319), 217456 states have internal predecessors, (1011319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217457 states to 217457 states and 1011319 transitions. [2021-06-05 16:02:28,191 INFO L78 Accepts]: Start accepts. Automaton has 217457 states and 1011319 transitions. Word has length 39 [2021-06-05 16:02:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:28,192 INFO L482 AbstractCegarLoop]: Abstraction has 217457 states and 1011319 transitions. [2021-06-05 16:02:28,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 217457 states and 1011319 transitions. [2021-06-05 16:02:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:02:29,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:29,552 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:02:29,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 16:02:29,773 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1030617839, now seen corresponding path program 51 times [2021-06-05 16:02:29,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:29,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962703470] [2021-06-05 16:02:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:29,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962703470] [2021-06-05 16:02:29,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962703470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132840126] [2021-06-05 16:02:29,923 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 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 16:02:29,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:02:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:02:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 91 [2021-06-05 16:02:30,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 16:02:30,326 INFO L628 ElimStorePlain]: treesize reduction 182, result has 17.3 percent of original size [2021-06-05 16:02:30,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:02:30,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:35 [2021-06-05 16:02:30,407 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 27 treesize of output 21 [2021-06-05 16:02:30,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:30,414 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-06-05 16:02:30,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:30,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-05 16:02:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:30,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132840126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:30,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:30,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 16:02:30,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728486212] [2021-06-05 16:02:30,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:02:30,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:30,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:02:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:02:30,444 INFO L87 Difference]: Start difference. First operand 217457 states and 1011319 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:37,095 INFO L93 Difference]: Finished difference Result 360833 states and 1636061 transitions. [2021-06-05 16:02:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:02:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:02:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:38,669 INFO L225 Difference]: With dead ends: 360833 [2021-06-05 16:02:38,669 INFO L226 Difference]: Without dead ends: 360264 [2021-06-05 16:02:38,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2285.8ms TimeCoverageRelationStatistics Valid=747, Invalid=3945, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:02:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360264 states. [2021-06-05 16:02:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360264 to 224298. [2021-06-05 16:02:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224298 states, 224297 states have (on average 4.64806930097148) internal successors, (1042548), 224297 states have internal predecessors, (1042548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224298 states to 224298 states and 1042548 transitions. [2021-06-05 16:02:48,484 INFO L78 Accepts]: Start accepts. Automaton has 224298 states and 1042548 transitions. Word has length 39 [2021-06-05 16:02:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:48,484 INFO L482 AbstractCegarLoop]: Abstraction has 224298 states and 1042548 transitions. [2021-06-05 16:02:48,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 224298 states and 1042548 transitions. [2021-06-05 16:02:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:02:49,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:49,157 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:02:49,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 16:02:49,357 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 75479869, now seen corresponding path program 52 times [2021-06-05 16:02:49,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:49,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131508510] [2021-06-05 16:02:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:49,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:49,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131508510] [2021-06-05 16:02:49,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131508510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:49,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300268630] [2021-06-05 16:02:49,489 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 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 16:02:49,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:49,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:02:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:49,730 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 48 treesize of output 40 [2021-06-05 16:02:49,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:49,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:49,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:49,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2021-06-05 16:02:49,775 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:02:49,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:02:49,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:49,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:49,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:49,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:02:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:49,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300268630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:49,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:49,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:02:49,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033976604] [2021-06-05 16:02:49,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:02:49,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:02:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:02:49,801 INFO L87 Difference]: Start difference. First operand 224298 states and 1042548 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:54,378 INFO L93 Difference]: Finished difference Result 314551 states and 1434836 transitions. [2021-06-05 16:02:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:02:54,378 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:02:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:56,742 INFO L225 Difference]: With dead ends: 314551 [2021-06-05 16:02:56,742 INFO L226 Difference]: Without dead ends: 314292 [2021-06-05 16:02:56,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 861.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:02:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314292 states. [2021-06-05 16:03:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314292 to 224026. [2021-06-05 16:03:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224026 states, 224025 states have (on average 4.648847226872001) internal successors, (1041458), 224025 states have internal predecessors, (1041458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224026 states to 224026 states and 1041458 transitions. [2021-06-05 16:03:06,527 INFO L78 Accepts]: Start accepts. Automaton has 224026 states and 1041458 transitions. Word has length 39 [2021-06-05 16:03:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:06,527 INFO L482 AbstractCegarLoop]: Abstraction has 224026 states and 1041458 transitions. [2021-06-05 16:03:06,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 224026 states and 1041458 transitions. [2021-06-05 16:03:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:03:07,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:07,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:03:07,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 16:03:07,404 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2065097261, now seen corresponding path program 53 times [2021-06-05 16:03:07,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:07,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579121372] [2021-06-05 16:03:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:07,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579121372] [2021-06-05 16:03:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579121372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587437678] [2021-06-05 16:03:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:03:07,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:03:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:03:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:07,799 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 20 [2021-06-05 16:03:07,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:07,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:07,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:07,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:38 [2021-06-05 16:03:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:07,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 98 [2021-06-05 16:03:08,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:03:08,032 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-06-05 16:03:08,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:03:08,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:15 [2021-06-05 16:03:08,120 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 16:03:08,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587437678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:08,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:08,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 16:03:08,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283621790] [2021-06-05 16:03:08,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:08,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:08,121 INFO L87 Difference]: Start difference. First operand 224026 states and 1041458 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:09,732 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-05 16:03:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:17,291 INFO L93 Difference]: Finished difference Result 612291 states and 2770531 transitions. [2021-06-05 16:03:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:03:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:03:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:20,916 INFO L225 Difference]: With dead ends: 612291 [2021-06-05 16:03:20,916 INFO L226 Difference]: Without dead ends: 611085 [2021-06-05 16:03:20,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 3281.1ms TimeCoverageRelationStatistics Valid=1022, Invalid=5784, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:03:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611085 states. [2021-06-05 16:03:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611085 to 251396. [2021-06-05 16:03:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251396 states, 251395 states have (on average 4.652522922094711) internal successors, (1169621), 251395 states have internal predecessors, (1169621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251396 states to 251396 states and 1169621 transitions. [2021-06-05 16:03:35,760 INFO L78 Accepts]: Start accepts. Automaton has 251396 states and 1169621 transitions. Word has length 39 [2021-06-05 16:03:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:35,761 INFO L482 AbstractCegarLoop]: Abstraction has 251396 states and 1169621 transitions. [2021-06-05 16:03:35,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 251396 states and 1169621 transitions. [2021-06-05 16:03:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:03:36,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:36,430 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:03:36,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:36,631 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2096718517, now seen corresponding path program 54 times [2021-06-05 16:03:36,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:36,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929576046] [2021-06-05 16:03:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:36,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929576046] [2021-06-05 16:03:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929576046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891431481] [2021-06-05 16:03:36,742 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 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 16:03:36,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:03:36,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:03:36,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:36,907 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 16:03:36,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:36,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:36,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:36,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-06-05 16:03:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:37,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:37,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:37,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:03:37,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:03:37,079 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.5 percent of original size [2021-06-05 16:03:37,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:03:37,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-06-05 16:03:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:37,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891431481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:37,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:37,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 16:03:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117253549] [2021-06-05 16:03:37,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:37,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:37,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:37,138 INFO L87 Difference]: Start difference. First operand 251396 states and 1169621 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:38,008 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-06-05 16:03:41,057 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 16:03:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:45,436 INFO L93 Difference]: Finished difference Result 489726 states and 2215398 transitions. [2021-06-05 16:03:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 16:03:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:03:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:48,561 INFO L225 Difference]: With dead ends: 489726 [2021-06-05 16:03:48,561 INFO L226 Difference]: Without dead ends: 488171 [2021-06-05 16:03:48,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 3448.4ms TimeCoverageRelationStatistics Valid=1358, Invalid=6124, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:03:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488171 states. [2021-06-05 16:03:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488171 to 256860. [2021-06-05 16:03:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256860 states, 256859 states have (on average 4.660412911363822) internal successors, (1197069), 256859 states have internal predecessors, (1197069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256860 states to 256860 states and 1197069 transitions. [2021-06-05 16:04:02,286 INFO L78 Accepts]: Start accepts. Automaton has 256860 states and 1197069 transitions. Word has length 39 [2021-06-05 16:04:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:02,286 INFO L482 AbstractCegarLoop]: Abstraction has 256860 states and 1197069 transitions. [2021-06-05 16:04:02,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 256860 states and 1197069 transitions. [2021-06-05 16:04:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:04:03,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:03,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:04:03,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:03,625 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -289523717, now seen corresponding path program 55 times [2021-06-05 16:04:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023335916] [2021-06-05 16:04:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:03,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:03,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023335916] [2021-06-05 16:04:03,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023335916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:03,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896181772] [2021-06-05 16:04:03,817 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 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 16:04:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:03,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:04:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:04,177 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 48 treesize of output 40 [2021-06-05 16:04:04,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:04,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:04,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:04,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2021-06-05 16:04:04,238 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:04:04,238 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 55 treesize of output 25 [2021-06-05 16:04:04,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:04,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:04,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:04,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:04:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:04,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896181772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:04,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:04,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:04:04,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135987466] [2021-06-05 16:04:04,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:04:04,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:04:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:04:04,264 INFO L87 Difference]: Start difference. First operand 256860 states and 1197069 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:09,186 INFO L93 Difference]: Finished difference Result 355175 states and 1636263 transitions. [2021-06-05 16:04:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:04:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:04:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:12,043 INFO L225 Difference]: With dead ends: 355175 [2021-06-05 16:04:12,043 INFO L226 Difference]: Without dead ends: 354916 [2021-06-05 16:04:12,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1270.7ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:04:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354916 states. [2021-06-05 16:04:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354916 to 267823. [2021-06-05 16:04:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267823 states, 267822 states have (on average 4.665624929990814) internal successors, (1249557), 267822 states have internal predecessors, (1249557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267823 states to 267823 states and 1249557 transitions. [2021-06-05 16:04:22,773 INFO L78 Accepts]: Start accepts. Automaton has 267823 states and 1249557 transitions. Word has length 39 [2021-06-05 16:04:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:22,773 INFO L482 AbstractCegarLoop]: Abstraction has 267823 states and 1249557 transitions. [2021-06-05 16:04:22,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 267823 states and 1249557 transitions. [2021-06-05 16:04:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:04:23,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:23,450 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:04:23,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:23,651 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:23,651 INFO L82 PathProgramCache]: Analyzing trace with hash 950062975, now seen corresponding path program 56 times [2021-06-05 16:04:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:23,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101084470] [2021-06-05 16:04:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:23,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:23,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101084470] [2021-06-05 16:04:23,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101084470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:23,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825683483] [2021-06-05 16:04:23,767 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:23,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:04:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:04:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:23,964 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 43 treesize of output 35 [2021-06-05 16:04:23,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:23,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:23,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:23,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:47 [2021-06-05 16:04:24,039 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:04:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:04:24,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:24,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:24,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:24,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:04:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:24,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825683483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:24,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:24,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:04:24,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304406641] [2021-06-05 16:04:24,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:04:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:24,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:04:24,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:04:24,693 INFO L87 Difference]: Start difference. First operand 267823 states and 1249557 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:29,083 INFO L93 Difference]: Finished difference Result 398493 states and 1822101 transitions. [2021-06-05 16:04:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:04:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:04:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:31,702 INFO L225 Difference]: With dead ends: 398493 [2021-06-05 16:04:31,702 INFO L226 Difference]: Without dead ends: 397964 [2021-06-05 16:04:31,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1143.1ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:04:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397964 states. [2021-06-05 16:04:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397964 to 270504. [2021-06-05 16:04:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270504 states, 270503 states have (on average 4.662314281172482) internal successors, (1261170), 270503 states have internal predecessors, (1261170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270504 states to 270504 states and 1261170 transitions. [2021-06-05 16:04:43,417 INFO L78 Accepts]: Start accepts. Automaton has 270504 states and 1261170 transitions. Word has length 39 [2021-06-05 16:04:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:43,417 INFO L482 AbstractCegarLoop]: Abstraction has 270504 states and 1261170 transitions. [2021-06-05 16:04:43,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 270504 states and 1261170 transitions. [2021-06-05 16:04:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:04:45,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:45,294 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:04:45,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:45,517 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -15140167, now seen corresponding path program 57 times [2021-06-05 16:04:45,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:45,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106793385] [2021-06-05 16:04:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:45,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:45,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106793385] [2021-06-05 16:04:45,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106793385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:45,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319463581] [2021-06-05 16:04:45,725 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:45,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:04:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:04:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:45,891 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 16:04:45,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:45,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:45,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:45,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:20 [2021-06-05 16:04:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 85 [2021-06-05 16:04:46,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:46,166 INFO L628 ElimStorePlain]: treesize reduction 23, result has 54.9 percent of original size [2021-06-05 16:04:46,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:04:46,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:26 [2021-06-05 16:04:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:46,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319463581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:46,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:46,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:04:46,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524901745] [2021-06-05 16:04:46,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:04:46,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:46,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:04:46,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:04:46,226 INFO L87 Difference]: Start difference. First operand 270504 states and 1261170 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:55,130 INFO L93 Difference]: Finished difference Result 515150 states and 2333357 transitions. [2021-06-05 16:04:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:04:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:04:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:58,328 INFO L225 Difference]: With dead ends: 515150 [2021-06-05 16:04:58,328 INFO L226 Difference]: Without dead ends: 514353 [2021-06-05 16:04:58,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2685.1ms TimeCoverageRelationStatistics Valid=549, Invalid=3111, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:04:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514353 states. [2021-06-05 16:05:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514353 to 270972. [2021-06-05 16:05:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270972 states, 270971 states have (on average 4.662605961523558) internal successors, (1263431), 270971 states have internal predecessors, (1263431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270972 states to 270972 states and 1263431 transitions. [2021-06-05 16:05:12,868 INFO L78 Accepts]: Start accepts. Automaton has 270972 states and 1263431 transitions. Word has length 39 [2021-06-05 16:05:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:12,868 INFO L482 AbstractCegarLoop]: Abstraction has 270972 states and 1263431 transitions. [2021-06-05 16:05:12,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 270972 states and 1263431 transitions. [2021-06-05 16:05:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:05:13,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:13,677 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:05:13,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 16:05:13,877 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1397762361, now seen corresponding path program 58 times [2021-06-05 16:05:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:13,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642383140] [2021-06-05 16:05:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:13,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:13,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642383140] [2021-06-05 16:05:13,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642383140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:13,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194441725] [2021-06-05 16:05:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:14,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:05:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:14,123 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 13 treesize of output 9 [2021-06-05 16:05:14,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:14,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:14,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:14,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-06-05 16:05:14,273 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:05:14,274 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 55 treesize of output 25 [2021-06-05 16:05:14,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:14,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:14,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:14,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:3 [2021-06-05 16:05:14,300 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 16:05:14,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194441725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:14,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:14,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:05:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627781996] [2021-06-05 16:05:14,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:05:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:14,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:05:14,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:05:14,301 INFO L87 Difference]: Start difference. First operand 270972 states and 1263431 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:15,903 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-06-05 16:05:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:20,038 INFO L93 Difference]: Finished difference Result 409958 states and 1861467 transitions. [2021-06-05 16:05:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:05:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:05:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:21,962 INFO L225 Difference]: With dead ends: 409958 [2021-06-05 16:05:21,962 INFO L226 Difference]: Without dead ends: 409423 [2021-06-05 16:05:21,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1613.5ms TimeCoverageRelationStatistics Valid=430, Invalid=2326, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:05:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409423 states. [2021-06-05 16:05:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409423 to 271954. [2021-06-05 16:05:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271954 states, 271953 states have (on average 4.663971347990278) internal successors, (1268381), 271953 states have internal predecessors, (1268381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271954 states to 271954 states and 1268381 transitions. [2021-06-05 16:05:36,309 INFO L78 Accepts]: Start accepts. Automaton has 271954 states and 1268381 transitions. Word has length 39 [2021-06-05 16:05:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:36,309 INFO L482 AbstractCegarLoop]: Abstraction has 271954 states and 1268381 transitions. [2021-06-05 16:05:36,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 271954 states and 1268381 transitions. [2021-06-05 16:05:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:05:37,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:37,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:05:37,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 16:05:37,305 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash -107967239, now seen corresponding path program 59 times [2021-06-05 16:05:37,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:37,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578757314] [2021-06-05 16:05:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:37,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:37,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578757314] [2021-06-05 16:05:37,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578757314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616825321] [2021-06-05 16:05:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:37,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:05:37,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:05:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:37,729 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 50 treesize of output 42 [2021-06-05 16:05:37,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:37,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:37,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:37,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:82 [2021-06-05 16:05:37,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:37,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:37,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 100 [2021-06-05 16:05:37,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:37,908 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.5 percent of original size [2021-06-05 16:05:37,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:05:37,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:21 [2021-06-05 16:05:37,950 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 16:05:37,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616825321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:37,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:37,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:05:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959529909] [2021-06-05 16:05:37,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:05:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:05:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:05:37,951 INFO L87 Difference]: Start difference. First operand 271954 states and 1268381 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:39,331 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 16:05:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:46,650 INFO L93 Difference]: Finished difference Result 580813 states and 2626661 transitions. [2021-06-05 16:05:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:05:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:05:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:50,218 INFO L225 Difference]: With dead ends: 580813 [2021-06-05 16:05:50,218 INFO L226 Difference]: Without dead ends: 580401 [2021-06-05 16:05:50,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2577.9ms TimeCoverageRelationStatistics Valid=631, Invalid=4199, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:05:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580401 states. [2021-06-05 16:06:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580401 to 310012. [2021-06-05 16:06:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310012 states, 310011 states have (on average 4.674063178403347) internal successors, (1449011), 310011 states have internal predecessors, (1449011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310012 states to 310012 states and 1449011 transitions. [2021-06-05 16:06:05,262 INFO L78 Accepts]: Start accepts. Automaton has 310012 states and 1449011 transitions. Word has length 39 [2021-06-05 16:06:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:05,262 INFO L482 AbstractCegarLoop]: Abstraction has 310012 states and 1449011 transitions. [2021-06-05 16:06:05,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 310012 states and 1449011 transitions. [2021-06-05 16:06:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:06:06,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:06,850 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 16:06:07,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:07,065 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1131619453, now seen corresponding path program 60 times [2021-06-05 16:06:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:07,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972941236] [2021-06-05 16:06:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:07,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:07,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972941236] [2021-06-05 16:06:07,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972941236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:07,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123529486] [2021-06-05 16:06:07,201 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:07,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:06:07,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:07,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:06:07,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:07,428 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 45 treesize of output 37 [2021-06-05 16:06:07,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:07,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:07,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:07,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:61 [2021-06-05 16:06:07,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:07,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:07,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 77 treesize of output 64 [2021-06-05 16:06:07,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:06:07,606 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:06:07,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:07,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:34 [2021-06-05 16:06:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:07,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123529486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:07,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:07,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:06:07,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735348795] [2021-06-05 16:06:07,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:06:07,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:07,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:06:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:06:07,670 INFO L87 Difference]: Start difference. First operand 310012 states and 1449011 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:14,836 INFO L93 Difference]: Finished difference Result 448706 states and 2048230 transitions. [2021-06-05 16:06:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:06:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:06:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:18,577 INFO L225 Difference]: With dead ends: 448706 [2021-06-05 16:06:18,577 INFO L226 Difference]: Without dead ends: 448177 [2021-06-05 16:06:18,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1015.5ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:06:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448177 states. [2021-06-05 16:06:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448177 to 305103. [2021-06-05 16:06:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305103 states, 305102 states have (on average 4.674771060170041) internal successors, (1426282), 305102 states have internal predecessors, (1426282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305103 states to 305103 states and 1426282 transitions. [2021-06-05 16:06:32,127 INFO L78 Accepts]: Start accepts. Automaton has 305103 states and 1426282 transitions. Word has length 39 [2021-06-05 16:06:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:32,127 INFO L482 AbstractCegarLoop]: Abstraction has 305103 states and 1426282 transitions. [2021-06-05 16:06:32,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 305103 states and 1426282 transitions. [2021-06-05 16:06:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:06:33,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:33,706 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-06-05 16:06:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 16:06:33,906 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -978356060, now seen corresponding path program 61 times [2021-06-05 16:06:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016399172] [2021-06-05 16:06:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 16:06:33,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:33,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016399172] [2021-06-05 16:06:33,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016399172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:33,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372728065] [2021-06-05 16:06:33,924 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:06:33,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:06:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372728065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:34,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:34,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 16:06:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352073762] [2021-06-05 16:06:34,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:06:34,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:06:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:06:34,042 INFO L87 Difference]: Start difference. First operand 305103 states and 1426282 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:39,905 INFO L93 Difference]: Finished difference Result 575590 states and 2583644 transitions. [2021-06-05 16:06:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:06:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:06:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 16:06:43,399 INFO L225 Difference]: With dead ends: 575590 [2021-06-05 16:06:43,399 INFO L226 Difference]: Without dead ends: 575380 [2021-06-05 16:06:43,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:06:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575380 states. [2021-06-05 16:06:44,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:44,319 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:06:44,320 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:06:44,322 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:06:44,322 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:06:44 BasicIcfg [2021-06-05 16:06:44,322 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:06:44,323 INFO L168 Benchmark]: Toolchain (without parser) took 604593.50 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 354.6 MB in the beginning and 9.8 GB in the end (delta: -9.4 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. [2021-06-05 16:06:44,323 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 375.4 MB. Free memory is still 355.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:06:44,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.39 ms. Allocated memory is still 375.4 MB. Free memory was 354.4 MB in the beginning and 353.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:06:44,323 INFO L168 Benchmark]: Boogie Preprocessor took 20.66 ms. Allocated memory is still 375.4 MB. Free memory was 353.0 MB in the beginning and 352.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:06:44,323 INFO L168 Benchmark]: RCFGBuilder took 395.68 ms. Allocated memory is still 375.4 MB. Free memory was 351.8 MB in the beginning and 336.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 16:06:44,323 INFO L168 Benchmark]: TraceAbstraction took 604142.20 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 336.1 MB in the beginning and 9.8 GB in the end (delta: -9.4 GB). Peak memory consumption was 6.3 GB. Max. memory is 16.0 GB. [2021-06-05 16:06:44,323 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 375.4 MB. Free memory is still 355.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.39 ms. Allocated memory is still 375.4 MB. Free memory was 354.4 MB in the beginning and 353.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.66 ms. Allocated memory is still 375.4 MB. Free memory was 353.0 MB in the beginning and 352.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 395.68 ms. Allocated memory is still 375.4 MB. Free memory was 351.8 MB in the beginning and 336.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 604142.20 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 336.1 MB in the beginning and 9.8 GB in the end (delta: -9.4 GB). Peak memory consumption was 6.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 604031.2ms, OverallIterations: 71, TraceHistogramMax: 5, EmptinessCheckTime: 22793.1ms, AutomataDifference: 257467.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11598 SDtfs, 31053 SDslu, 117008 SDs, 0 SdLazy, 72046 SolverSat, 2790 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34647.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4492 GetRequests, 1976 SyntacticMatches, 31 SemanticMatches, 2485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33066 ImplicationChecksByTransitivity, 70463.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=310012occurred in iteration=69, InterpolantAutomatonStates: 2042, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 273402.4ms AutomataMinimizationTime, 71 MinimizatonAttempts, 4871480 StatesRemovedByMinimization, 69 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 458.2ms SsaConstructionTime, 1407.1ms SatisfiabilityAnalysisTime, 32057.1ms InterpolantComputationTime, 5009 NumberOfCodeBlocks, 5005 NumberOfCodeBlocksAsserted, 253 NumberOfCheckSat, 4869 ConstructedInterpolants, 55 QuantifiedInterpolants, 83020 SizeOfPredicates, 309 NumberOfNonLiveVariables, 7658 ConjunctsInSsa, 1428 ConjunctsInUnsatCore, 140 InterpolantComputations, 3 PerfectInterpolantSequences, 241/2381 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