/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:34:10,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:34:10,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:34:10,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:34:10,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:34:10,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:34:10,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:34:10,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:34:10,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:34:10,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:34:10,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:34:10,482 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:34:10,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:34:10,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:34:10,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:34:10,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:34:10,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:34:10,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:34:10,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:34:10,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:34:10,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:34:10,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:34:10,753 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:34:10,753 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:34:10,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2021-06-05 23:34:10,754 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-06-05 23:34:11,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:34:11,026 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:34:11,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:34:11,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:34:11,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:34:11,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:34:11,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:34:11,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:34:11,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:34:11,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... [2021-06-05 23:34:11,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:34:11,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:34:11,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:34:11,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:34:11,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:34:11,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:34:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:34:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:34:11,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:34:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:34:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:34:11,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:34:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:34:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:34:11,103 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:34:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:34:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:34:11,103 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:34:11,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:34:11,357 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:34:11,358 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:34:11 BoogieIcfgContainer [2021-06-05 23:34:11,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:34:11,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:34:11,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:34:11,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:34:11,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:11" (1/2) ... [2021-06-05 23:34:11,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7bf3c3 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:34:11, skipping insertion in model container [2021-06-05 23:34:11,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:34:11" (2/2) ... [2021-06-05 23:34:11,380 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-06-05 23:34:11,383 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:34:11,383 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:34:11,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:34:11,384 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:34:11,429 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:34:11,444 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:34:11,466 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:34:11,467 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:34:11,467 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:34:11,467 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:34:11,468 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:34:11,468 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:34:11,468 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:34:11,468 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:34:11,477 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-06-05 23:34:11,531 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:11,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:11,553 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:11,554 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:11,558 INFO L82 PathProgramCache]: Analyzing trace with hash 425333675, now seen corresponding path program 1 times [2021-06-05 23:34:11,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:11,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146698162] [2021-06-05 23:34:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:11,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146698162] [2021-06-05 23:34:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146698162] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:11,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:11,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:34:11,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144226932] [2021-06-05 23:34:11,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:34:11,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:34:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:11,680 INFO L87 Difference]: Start difference. First operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 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 7.333333333333333) 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 23:34:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:11,726 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-06-05 23:34:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:34:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) 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 23:34:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:11,746 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 23:34:11,746 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 23:34:11,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 23:34:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-05 23:34:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.976639712488769) internal successors, (3313), 1113 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-06-05 23:34:11,825 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-06-05 23:34:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:11,825 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-06-05 23:34:11,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) 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 23:34:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-06-05 23:34:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:11,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:11,828 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:11,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:34:11,829 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash -266133116, now seen corresponding path program 1 times [2021-06-05 23:34:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:11,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765408198] [2021-06-05 23:34:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:11,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:11,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765408198] [2021-06-05 23:34:11,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765408198] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:11,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:11,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:34:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128560410] [2021-06-05 23:34:11,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:34:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:11,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:34:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:11,874 INFO L87 Difference]: Start difference. First operand 1114 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:11,886 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-06-05 23:34:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:34:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:11,892 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 23:34:11,892 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 23:34:11,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 23:34:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-06-05 23:34:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9659498207885306) internal successors, (3310), 1116 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-06-05 23:34:11,920 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-06-05 23:34:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:11,920 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-06-05 23:34:11,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-06-05 23:34:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:11,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:11,923 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:11,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:34:11,923 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 562503080, now seen corresponding path program 2 times [2021-06-05 23:34:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:11,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845328589] [2021-06-05 23:34:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:11,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845328589] [2021-06-05 23:34:11,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845328589] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:11,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:11,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:34:11,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824704296] [2021-06-05 23:34:11,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:34:11,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:34:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:11,957 INFO L87 Difference]: Start difference. First operand 1117 states and 3310 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:11,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:11,971 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-06-05 23:34:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:34:11,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:11,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:11,976 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 23:34:11,977 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 23:34:11,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 23:34:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-06-05 23:34:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.967400162999185) internal successors, (3641), 1227 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-06-05 23:34:12,000 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-06-05 23:34:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:12,000 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-06-05 23:34:12,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-06-05 23:34:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:34:12,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:12,003 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:12,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:34:12,003 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 630436378, now seen corresponding path program 1 times [2021-06-05 23:34:12,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:12,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566726009] [2021-06-05 23:34:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:12,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:12,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566726009] [2021-06-05 23:34:12,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566726009] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:12,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:12,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:34:12,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914564736] [2021-06-05 23:34:12,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:34:12,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:34:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:12,054 INFO L87 Difference]: Start difference. First operand 1228 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:12,069 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2021-06-05 23:34:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:34:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:34:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:12,075 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 23:34:12,075 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 23:34:12,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 23:34:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-06-05 23:34:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.9382402707275803) internal successors, (3473), 1182 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2021-06-05 23:34:12,100 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2021-06-05 23:34:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:12,100 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2021-06-05 23:34:12,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2021-06-05 23:34:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:34:12,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:12,103 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:12,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:34:12,104 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash -321367481, now seen corresponding path program 1 times [2021-06-05 23:34:12,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:12,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616787585] [2021-06-05 23:34:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:12,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:12,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616787585] [2021-06-05 23:34:12,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616787585] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:12,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:34:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610119188] [2021-06-05 23:34:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:34:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:34:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:12,156 INFO L87 Difference]: Start difference. First operand 1183 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 23:34:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:12,168 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2021-06-05 23:34:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:34:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 37 [2021-06-05 23:34:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:12,172 INFO L225 Difference]: With dead ends: 915 [2021-06-05 23:34:12,172 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 23:34:12,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 23:34:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-06-05 23:34:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.8555798687089715) internal successors, (2610), 914 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2021-06-05 23:34:12,193 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2021-06-05 23:34:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:12,194 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2021-06-05 23:34:12,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 23:34:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2021-06-05 23:34:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:34:12,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:12,196 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:12,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:34:12,196 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1106779099, now seen corresponding path program 2 times [2021-06-05 23:34:12,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:12,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490519532] [2021-06-05 23:34:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:12,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:12,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490519532] [2021-06-05 23:34:12,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490519532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:12,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434694506] [2021-06-05 23:34:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:12,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:12,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:34:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:12,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:12,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:12,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:12,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434694506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:12,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:12,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 23:34:12,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167199309] [2021-06-05 23:34:12,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:34:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:34:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:34:12,514 INFO L87 Difference]: Start difference. First operand 915 states and 2610 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:12,592 INFO L93 Difference]: Finished difference Result 1329 states and 3816 transitions. [2021-06-05 23:34:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:34:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:34:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:12,599 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 23:34:12,600 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 23:34:12,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:34:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 23:34:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1260. [2021-06-05 23:34:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.871326449563145) internal successors, (3615), 1259 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3615 transitions. [2021-06-05 23:34:12,629 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3615 transitions. Word has length 37 [2021-06-05 23:34:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:12,631 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 3615 transitions. [2021-06-05 23:34:12,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3615 transitions. [2021-06-05 23:34:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:34:12,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:12,634 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 23:34:12,849 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1059420440, now seen corresponding path program 3 times [2021-06-05 23:34:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:12,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996088778] [2021-06-05 23:34:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:12,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996088778] [2021-06-05 23:34:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996088778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949601754] [2021-06-05 23:34:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:12,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:34:12,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:12,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:34:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:13,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949601754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:13,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:34:13,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-06-05 23:34:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841365545] [2021-06-05 23:34:13,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:34:13,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:34:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:34:13,061 INFO L87 Difference]: Start difference. First operand 1260 states and 3615 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:13,088 INFO L93 Difference]: Finished difference Result 2714 states and 7974 transitions. [2021-06-05 23:34:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:34:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:34:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:13,097 INFO L225 Difference]: With dead ends: 2714 [2021-06-05 23:34:13,097 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 23:34:13,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:34:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 23:34:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2421. [2021-06-05 23:34:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.997520661157025) internal successors, (7254), 2420 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 7254 transitions. [2021-06-05 23:34:13,170 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 7254 transitions. Word has length 42 [2021-06-05 23:34:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:13,171 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 7254 transitions. [2021-06-05 23:34:13,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 7254 transitions. [2021-06-05 23:34:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:34:13,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:13,175 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:13,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:13,389 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 41400296, now seen corresponding path program 4 times [2021-06-05 23:34:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:13,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953327690] [2021-06-05 23:34:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:13,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953327690] [2021-06-05 23:34:13,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953327690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149676021] [2021-06-05 23:34:13,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:13,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:13,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:13,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:34:13,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:13,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:13,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:13,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:13,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:13,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 23:34:13,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:13,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:13,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:13,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:13,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:13,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149676021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:13,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:13,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 23:34:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839107913] [2021-06-05 23:34:13,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:34:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:34:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:34:13,640 INFO L87 Difference]: Start difference. First operand 2421 states and 7254 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:13,805 INFO L93 Difference]: Finished difference Result 2592 states and 7796 transitions. [2021-06-05 23:34:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:34:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:34:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:13,816 INFO L225 Difference]: With dead ends: 2592 [2021-06-05 23:34:13,817 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 23:34:13,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:34:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 23:34:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2369. [2021-06-05 23:34:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.00464527027027) internal successors, (7115), 2368 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 7115 transitions. [2021-06-05 23:34:13,857 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 7115 transitions. Word has length 42 [2021-06-05 23:34:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:13,858 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 7115 transitions. [2021-06-05 23:34:13,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 7115 transitions. [2021-06-05 23:34:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:34:13,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:13,862 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:14,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:14,077 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:14,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2037460374, now seen corresponding path program 5 times [2021-06-05 23:34:14,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:14,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565910503] [2021-06-05 23:34:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:14,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565910503] [2021-06-05 23:34:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565910503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113849664] [2021-06-05 23:34:14,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:14,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:34:14,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:34:14,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:14,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113849664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:14,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:14,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-05 23:34:14,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144172258] [2021-06-05 23:34:14,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:34:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:34:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:34:14,255 INFO L87 Difference]: Start difference. First operand 2369 states and 7115 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 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 23:34:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:14,276 INFO L93 Difference]: Finished difference Result 4663 states and 13882 transitions. [2021-06-05 23:34:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:34:14,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 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 47 [2021-06-05 23:34:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:14,292 INFO L225 Difference]: With dead ends: 4663 [2021-06-05 23:34:14,292 INFO L226 Difference]: Without dead ends: 4635 [2021-06-05 23:34:14,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:34:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-05 23:34:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3953. [2021-06-05 23:34:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 3.0587044534412957) internal successors, (12088), 3952 states have internal predecessors, (12088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 12088 transitions. [2021-06-05 23:34:14,370 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 12088 transitions. Word has length 47 [2021-06-05 23:34:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:14,370 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 12088 transitions. [2021-06-05 23:34:14,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 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 23:34:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 12088 transitions. [2021-06-05 23:34:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:34:14,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:14,376 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:14,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:14,599 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash 31320406, now seen corresponding path program 6 times [2021-06-05 23:34:14,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:14,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738169625] [2021-06-05 23:34:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:14,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:14,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738169625] [2021-06-05 23:34:14,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738169625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:14,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85663392] [2021-06-05 23:34:14,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:14,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:34:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:34:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:14,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:14,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:14,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:14,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:14,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 23:34:15,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:15,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:15,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:15,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:15,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 23:34:15,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:34:15,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:15,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:15,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:15,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:15 [2021-06-05 23:34:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:15,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85663392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:15,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:15,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 23:34:15,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595594577] [2021-06-05 23:34:15,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:34:15,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:34:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:34:15,226 INFO L87 Difference]: Start difference. First operand 3953 states and 12088 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 23:34:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:15,757 INFO L93 Difference]: Finished difference Result 4432 states and 13258 transitions. [2021-06-05 23:34:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:34:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 47 [2021-06-05 23:34:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:15,766 INFO L225 Difference]: With dead ends: 4432 [2021-06-05 23:34:15,766 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 23:34:15,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:34:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 23:34:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3885. [2021-06-05 23:34:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.058444902162719) internal successors, (11879), 3884 states have internal predecessors, (11879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 11879 transitions. [2021-06-05 23:34:15,863 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 11879 transitions. Word has length 47 [2021-06-05 23:34:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:15,863 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 11879 transitions. [2021-06-05 23:34:15,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 23:34:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 11879 transitions. [2021-06-05 23:34:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 23:34:15,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:15,869 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:16,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 23:34:16,085 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2006073215, now seen corresponding path program 7 times [2021-06-05 23:34:16,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:16,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080141885] [2021-06-05 23:34:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:34:16,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:16,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080141885] [2021-06-05 23:34:16,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080141885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:16,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026406347] [2021-06-05 23:34:16,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:34:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:34:16,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026406347] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:16,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:34:16,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-06-05 23:34:16,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379192421] [2021-06-05 23:34:16,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:34:16,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:34:16,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:34:16,237 INFO L87 Difference]: Start difference. First operand 3885 states and 11879 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:16,243 INFO L93 Difference]: Finished difference Result 836 states and 2021 transitions. [2021-06-05 23:34:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:34:16,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 23:34:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:16,246 INFO L225 Difference]: With dead ends: 836 [2021-06-05 23:34:16,246 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 23:34:16,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:34:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 23:34:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 689. [2021-06-05 23:34:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.457848837209302) internal successors, (1691), 688 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1691 transitions. [2021-06-05 23:34:16,256 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1691 transitions. Word has length 52 [2021-06-05 23:34:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:16,256 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1691 transitions. [2021-06-05 23:34:16,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1691 transitions. [2021-06-05 23:34:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 23:34:16,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:16,258 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:16,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:16,461 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash 535250071, now seen corresponding path program 8 times [2021-06-05 23:34:16,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:16,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773565689] [2021-06-05 23:34:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:34:16,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:16,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773565689] [2021-06-05 23:34:16,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773565689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:16,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118430480] [2021-06-05 23:34:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:16,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:16,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:34:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:16,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:16,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:16,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:16,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:34:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118430480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 23:34:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608503129] [2021-06-05 23:34:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:34:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:34:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:34:16,649 INFO L87 Difference]: Start difference. First operand 689 states and 1691 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:16,719 INFO L93 Difference]: Finished difference Result 629 states and 1516 transitions. [2021-06-05 23:34:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:34:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 52 [2021-06-05 23:34:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:16,720 INFO L225 Difference]: With dead ends: 629 [2021-06-05 23:34:16,720 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 23:34:16,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:34:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 23:34:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-06-05 23:34:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.4140127388535033) internal successors, (1516), 628 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2021-06-05 23:34:16,728 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2021-06-05 23:34:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:16,729 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2021-06-05 23:34:16,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2021-06-05 23:34:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 23:34:16,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:16,730 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:16,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:16,941 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1828697708, now seen corresponding path program 9 times [2021-06-05 23:34:16,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:16,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226811254] [2021-06-05 23:34:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:34:17,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226811254] [2021-06-05 23:34:17,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226811254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976705469] [2021-06-05 23:34:17,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:17,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:34:17,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:34:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:17,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:17,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 23:34:17,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:34:17,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:17,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:17,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2021-06-05 23:34:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:34:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:34:17,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:34:17,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:34:17,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:34:17,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:17,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:17,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:34:17,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:52, output treesize:22 [2021-06-05 23:34:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:17,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976705469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:17,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:17,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 23:34:17,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374139166] [2021-06-05 23:34:17,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:34:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:17,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:34:17,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:34:17,581 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:18,204 INFO L93 Difference]: Finished difference Result 619 states and 1454 transitions. [2021-06-05 23:34:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:34:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 23:34:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:18,205 INFO L225 Difference]: With dead ends: 619 [2021-06-05 23:34:18,205 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 23:34:18,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:34:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 23:34:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 584. [2021-06-05 23:34:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.3825042881646654) internal successors, (1389), 583 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1389 transitions. [2021-06-05 23:34:18,213 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1389 transitions. Word has length 57 [2021-06-05 23:34:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:18,213 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1389 transitions. [2021-06-05 23:34:18,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1389 transitions. [2021-06-05 23:34:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 23:34:18,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:18,214 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:18,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:34:18,432 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:18,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1694652934, now seen corresponding path program 10 times [2021-06-05 23:34:18,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:18,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568274189] [2021-06-05 23:34:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:18,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:18,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568274189] [2021-06-05 23:34:18,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568274189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:18,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329663105] [2021-06-05 23:34:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:18,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:18,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:18,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:34:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:18,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:18,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:18,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:18,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:18,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 23:34:18,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:34:18,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:18,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:18,778 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 23:34:18,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:34:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:18,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329663105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:18,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:18,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-06-05 23:34:18,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566106527] [2021-06-05 23:34:18,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:34:18,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:34:18,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:34:18,804 INFO L87 Difference]: Start difference. First operand 584 states and 1389 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:19,124 INFO L93 Difference]: Finished difference Result 578 states and 1357 transitions. [2021-06-05 23:34:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:34:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 23:34:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:19,125 INFO L225 Difference]: With dead ends: 578 [2021-06-05 23:34:19,125 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 23:34:19,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:34:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 23:34:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 559. [2021-06-05 23:34:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.347670250896057) internal successors, (1310), 558 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2021-06-05 23:34:19,142 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2021-06-05 23:34:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:19,143 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2021-06-05 23:34:19,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2021-06-05 23:34:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 23:34:19,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:19,144 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:19,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:19,359 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1465250578, now seen corresponding path program 11 times [2021-06-05 23:34:19,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:19,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876424837] [2021-06-05 23:34:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:20,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:20,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876424837] [2021-06-05 23:34:20,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876424837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:20,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705247479] [2021-06-05 23:34:20,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:20,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:34:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:34:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:20,564 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:34:20,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:34:20,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:20,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:20,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:20,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:56 [2021-06-05 23:34:20,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:20,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:34:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:34:20,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:20,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:20,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:20,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:35 [2021-06-05 23:34:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:34:20,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:34:20,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:34:20,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 23:34:20,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:20,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:20,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:34:20,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:17 [2021-06-05 23:34:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:34:20,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705247479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:20,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:20,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2021-06-05 23:34:20,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263314471] [2021-06-05 23:34:20,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:34:20,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:20,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:34:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:34:20,960 INFO L87 Difference]: Start difference. First operand 559 states and 1310 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:23,213 INFO L93 Difference]: Finished difference Result 653 states and 1524 transitions. [2021-06-05 23:34:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:34:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 23:34:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:23,214 INFO L225 Difference]: With dead ends: 653 [2021-06-05 23:34:23,214 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 23:34:23,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2756.3ms TimeCoverageRelationStatistics Valid=539, Invalid=3751, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:34:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 23:34:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 23:34:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 23:34:23,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-06-05 23:34:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:23,215 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 23:34:23,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 23:34:23,215 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 23:34:23,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:23,418 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:34:23,419 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:34:23 BasicIcfg [2021-06-05 23:34:23,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:34:23,420 INFO L168 Benchmark]: Toolchain (without parser) took 12393.72 ms. Allocated memory was 339.7 MB in the beginning and 474.0 MB in the end (delta: 134.2 MB). Free memory was 319.4 MB in the beginning and 293.2 MB in the end (delta: 26.1 MB). Peak memory consumption was 160.4 MB. Max. memory is 16.0 GB. [2021-06-05 23:34:23,420 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:34:23,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.13 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 317.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:34:23,420 INFO L168 Benchmark]: Boogie Preprocessor took 11.98 ms. Allocated memory is still 339.7 MB. Free memory was 317.8 MB in the beginning and 316.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:34:23,420 INFO L168 Benchmark]: RCFGBuilder took 300.51 ms. Allocated memory is still 339.7 MB. Free memory was 316.6 MB in the beginning and 298.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 23:34:23,420 INFO L168 Benchmark]: TraceAbstraction took 12059.79 ms. Allocated memory was 339.7 MB in the beginning and 474.0 MB in the end (delta: 134.2 MB). Free memory was 298.2 MB in the beginning and 293.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 139.4 MB. Max. memory is 16.0 GB. [2021-06-05 23:34:23,420 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 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.13 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 317.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.98 ms. Allocated memory is still 339.7 MB. Free memory was 317.8 MB in the beginning and 316.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 300.51 ms. Allocated memory is still 339.7 MB. Free memory was 316.6 MB in the beginning and 298.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 12059.79 ms. Allocated memory was 339.7 MB in the beginning and 474.0 MB in the end (delta: 134.2 MB). Free memory was 298.2 MB in the beginning and 293.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 139.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11951.3ms, OverallIterations: 15, TraceHistogramMax: 3, EmptinessCheckTime: 60.0ms, AutomataDifference: 4329.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 839 SDtfs, 2426 SDslu, 4626 SDs, 0 SdLazy, 2523 SolverSat, 459 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1215.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 669 GetRequests, 452 SyntacticMatches, 6 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 4611.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3953occurred in iteration=9, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 521.8ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1863 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 102.1ms SsaConstructionTime, 345.9ms SatisfiabilityAnalysisTime, 4005.8ms InterpolantComputationTime, 1135 NumberOfCodeBlocks, 1135 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1110 ConstructedInterpolants, 7 QuantifiedInterpolants, 7258 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1280 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 164/407 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...